Domains. Equipment degreasing methods. General Process Requirements Flushing Oxygen Gauges
No. ________ "__" ______ 20__
Representative of the builder or customer _____________________________________
(job title,
Representative of the person carrying out the construction, __________________________
(job title,
__________________________________________________________________________
surname, initials, details of the representation document)
Representative of the person carrying out the construction on the issues of construction control __________________________________________________________________
(job title,
__________________________________________________________________________
surname, initials, details of the representation document)
Representative of the person carrying out the construction, performing the technical management installation work, (chief engineer) _____________________________
__________________________________________________________________________
Representative of the person preparing project documentation, ______
__________________________________________________________________________
(position, surname, initials
__________________________________________________________________________
details of the representation document)
Representative of the person carrying out the construction, who performed the degreasing of the equipment, _______________________________________________
(position, surname, initials,
__________________________________________________________________________
details of the representation document)
as well as other representatives of persons involved in degreasing, _________________
__________________________________________________________________________
(position, surname, initials,
__________________________________________________________________________
details of the representation document)
carried out control of processes and consideration of the results of degreasing of equipment, fittings, pipelines, assembly units and parts (hereinafter referred to as the product), presented by ____________________________________________
(name of the person, in fact
__________________________________________________________________________
presenting the product for degreasing)
and have drawn up this act as follows:
1. The product has been degreased:
a) technological equipment (apparatus, container, etc.)
b) fittings of the same type
c) pipeline, pipeline network
d) assembly unit, detail
2. Accompanying documents are presented __________________________________
__________________________________________________________________________
__________________________________________________________________________
as well as project documentation for non-standard equipment ________________
__________________________________________________________________________
(number, other details of the drawing, name of the design
__________________________________________________________________________
documentation, information about persons carrying out
__________________________________________________________________________
preparation of a section of project documentation)
3. Documents were presented confirming the compliance of the product with the requirements for it, including:
a) for compliance with the requirements of the technical documentation of manufacturers and design documentation of developers, technical regulations (norms and rules), other regulatory legal acts _______________________________
(Name
__________________________________________________________________________
document of conformity, date, number, other details)
b) the results of examinations, surveys, laboratory and other tests and work performed, carried out in building control
__________________________________________________________________________
(document name, date, number, other details)
4. Necessary tests and tests have been carried out ___________________________
__________________________________________________________________________
(document name, date, number, other details)
5. Documents were presented confirming the quality of degreasing of the product from the manufacturer, ______________________________________________________________
__________________________________________________________________________
(document name, date, number, other details)
6. The product is manufactured (delivered) __________________________________________
(name of the manufacturer (supplier, intermediary),
__________________________________________________________________________
name, number and date of issue of the certificate of state registration, PSRN, TIN,
__________________________________________________________________________
postal details, telephone, fax - for legal entities;
__________________________________________________________________________
Full Name, passport details,
__________________________________________________________________________
place of residence, telephone, fax - for individuals)
7. Characteristics of the product subjected to degreasing of internal surfaces, ______________________________________________________________
(product purpose, technological
__________________________________________________________________________
environment in the product, its condition and characteristics,
__________________________________________________________________________
requirements for cleanliness of internal surfaces)
8. A work permit has been presented for work
__________________________________________________________________________
(document name, date, number, other details)
Oxygen pressure gauges are instruments that measure the pressure of oxygen. According to GOST 12.2.052–81/19/, media with an oxygen content of 23% or more are oxygen.
The contact of oxygen with mineral oils and some organic substances causes an explosion that occurs even at their small proportions. The power of such an explosion, as well as its occurrence, is not determined by the amount of oil.
Therefore, the main condition for packing and transporting oxygen manometers is the following: it is strictly forbidden to take them with gloves and hands that may contain traces of mineral oil, as well as lay them out when packing on tables that have not been previously degreased with a solvent. Pallets should be cut with fat-free cutters or scissors according to the number of devices to be shipped.
Oxygen manometers structurally practically do not differ from general industrial ones. The requirements for measuring ranges, accuracy classes, housing sizes, etc. are the same. Increased requirements remain for reliability. They are identical to gas. principled distinguishing feature oxygen manometers - strict observance of the maximum permissible oil concentrations on the surfaces of the meter that come into contact with oxygen-containing media.
The presence of oil, which can be determined visually, on the outer parts of oxygen manometers is also unacceptable.
Oxygen manometers must have full or conventions: oxygen, oil hazardous. In addition, in order to externally distinguish oxygen manometers from industrial ones, European standards recommend painting the case and (or) part of the scale in blue. GOST 2405-88/4/ does not regulate such requirements. However, GOST 12.2.052-81/19/ regulates the obligation to paint oxygen equipment in blue or apply a strip of the same color to it.
In the process of checking pressure gauges, it is mandatory to test the internal surfaces of the sensitive element and the inlet fitting for the presence of oil. It consists in washing the internal surfaces of the device with a solvent and then monitoring the oil concentration in it.
In industrial conditions, for degreasing, gasoline-solvent BR-1 "Galosha" is used.
Control over the absence of oil on the internal surfaces of the manometer is carried out as follows: hot water is injected into the inlet of the fitting with a syringe, shaken inside the device, and then poured into a vessel with clean water or shaken out onto a white sheet of paper. The appearance of an iridescent film on the surface of the water or fatty stains on paper indicates the presence of an oil fraction. It is necessary to pour the flushing liquid only into water, since in other media oil, as a fraction with a large specific gravity, can sink to the bottom and will not be noticeable during visual assessment.
To degrease assembled pressure gauges, the internal measuring cavity is washed with a solvent using a syringe or other devices that allow liquid to be injected into the nozzle inlet.
The solvent must be in the degreased cavities for at least 20 minutes.
Thus, the rules for operation, transportation and storage are as follows:
Transport and storage oxygen manometers should only be carried out in a special form and a box protected from the penetration of oily liquids.
Exploitation oxygen manometers should be carried out where there are no fatty contamination on surfaces in contact with oxygen-containing media.
The interaction of compressed gaseous oxygen with organic substances (fats, lubricants) leads to their self-ignition and explosion. Therefore, it is so important when working with the appropriate equipment to exclude such contact for all devices. One of the obligatory measures in this case is the degreasing of oxygen manometers that perform a control and measuring function. It is carried out after each state verification of the device.
How to determine the presence of organic oils inside the pressure gauge? To do this, hot water must be injected into the inlet of the fitting using a syringe. After vigorous shaking, pour it into a test tube with ordinary clean water or onto a white paper sheet. The presence of oil will be indicated by an iridescent film on the surface of the liquid or greasy spots on paper.
Solvent degreasing
If there is an oil fraction inside the device, it is necessary to thoroughly degrease the pressure gauge. To do this, chlorine-containing solvents (trichlorethylene, perchlorethylene, freon 113) are injected into the cavity of its tubular spring, which must be inside the measuring device for at least 20 minutes. After exposure, they are removed by evacuation or by free flow into the prepared vessel.
The quality of solvent degreasing is controlled by checking its last portion. The spent liquid is poured onto an absorbent paper napkin and the presence of oil inclusions is determined by fluorescence of its surface in ultraviolet light. Compared to water wetting, they have a different luminescence intensity.
Degreasing the pressure gauge with chlorine-containing solvents provides no more than 20 mg / sq.m. residual oil content.
As for checking the oil content on the outer surface of the pressure gauge, it is carried out in two ways: with ultraviolet illuminators and with a special thin glass fiber cloth.
In the latter case, the presence of fatty contaminants is checked with a luminescent device or the so-called quantitative method. With it, the used napkin is washed in 100 cm 3 of the solvent. After that, 10 cm 3 of this solution is poured into the cuvette of a luminescent device, where the oil content is determined.
Control over the degreasing of oxygen manometers is based on measurements of the concentration of fatty contaminants in the spent solvent. The figures obtained should not exceed the normative values, depending on the pressure of the measured oxygen-containing medium.
Change No. 2 to this OST has been amendedIndustry Standard
OST 26-04-312-83
Equipment degreasing methods. General requirements for technological processes
(introduced by letter Technical management Minkhimmash dated November 29, 1983 N 11-10-4 / 1685)
The validity period is set from January 1, 1985. Instead of OST 26-04-312-71 This standard applies to cryogenic, cryogenic-vacuum equipment and equipment operating with oxygen, including medical, nitrogen and other air separation products, and establishes general technological requirements for methods for removing fatty contaminants from the surface of products (degreasing). The standard does not establish requirements for the processes of depreservation of products. Explanations of the terms used in this standard are given in reference annex 1.
| 1. General provisions 2. Technical requirements 3. Safety requirements 4. General technological requirements 5. Degreasing quality control Appendix 1 Explanation of terms Appendix 2 Features of degreasing various types equipment 1. General provisions 2. Degreasing of air separation units 3. Degreasing of cryogenic vessels, cylinders and transport tanks 4. Degreasing of liquid oxygen pumps 5. Degreasing of gasification plants 6. Degreasing of cryogenic cold gasifiers of the GKH type 7. Degreasing of oxygen compressors 8. Degreasing of pipelines and hoses 9. Degreasing fittings and appliances Appendix 3 Requirements for solvents Appendix 4 Preparation of baths with aqueous cleaning solutions, their control and adjustment 1. Preparation of baths 2. Control and adjustment of baths |
1. General Provisions
1.1. Degreasing of equipment should be carried out in case of exceeding the norms for the content of fatty contaminants on the surface, established by regulatory and technical documents, technical documentation (drawings, specifications and operational documentation), during manufacture, installation, repair and operation. The standards for equipment operating with gaseous oxygen are established in accordance with GOST 12.2.052, for equipment operating with liquid oxygen - according to OST 26-04-1362, for cryogenic vacuum equipment - according to OST 26-04-2600. The method and means of degreasing are indicated in the technological documentation. The operational documentation indicates the method, means and frequency of degreasing or criteria that determine the need for degreasingDepending on design features products, it is allowed to indicate the degreasing method in the technical documentation (drawings, specifications), if this method is the only one that guarantees the required quality of degreasing, or to limit the use of individual methods. 1.1.1. Excluded since July 1, 1987 1.2. The procedure for degreasing equipment during manufacture should be established by instructions and technological processes developed at the manufacturer in accordance with the requirements of this standard. When carrying out installation or repair work, the procedure and technological process of degreasing, developed in accordance with the requirements of this standard, must be determined by the organization conducting the installation or repair work, degreasing during operation is carried out in accordance with the operational documentation. Change No. 1 , approved by the Deputy Minister of Chemical and Petroleum Engineering on January 4, 1987, paragraph 1.3 of this OST has been amended to come into force on July 1, 1987. 1.3. Degreasing of individual parts before assembly or products after assembly at the factory and during installation may not be carried out if, during the manufacturing process, the parts from which the product is assembled were degreased or underwent chemical or galvanic treatment in accordance with GOST 9.305 (clarification, passivation, zinc plating, etc.). .p.), and surface contamination was excluded during storage and assembly. In case of contact with fatty contaminants on parts with galvanized coatings, it is allowed to degrease them by wiping with aqueous detergent solutions at a temperature not exceeding 40°C. Please note that this may damage the appearance of the coating. 1.4. Degreasing during installation is not subject to equipment that meets the requirements of technical documentation for the content of fatty contaminants on the surface, has confirmation in the passport and arrived at the installation site with intact plugs and in a whole package. 1.5. Features of degreasing of various types of equipment are given in the recommended Appendix 2. 1.6. Compliance of the content of fatty contaminants with the established standards is confirmed by a mark in the control route chart, in the technological passport of the product or in other technical documentation. On the basis of these documents, marks are entered in the product passport, for example: "The content of fatty contaminants does not exceed the standards established by GOST 12.2.052" * or "fat-free." 1.7. The preparation and conduct of all degreasing work should be supervised by a responsible person appointed by a written order of the administration, who should be fully responsible for compliance with the degreasing technology, timely technical control and safety of the work.2. Technical requirements
2.1. Material Requirements
2.1.1. Solvents or aqueous cleaning solutions should be used to degrease the equipment. The need to use solvents or aqueous cleaning solutions should be indicated in the technological documentation.
2.2. Solvents
2.2.1. Solvents are divided into two groups: Group 1 - fireproof, used for degreasing assembled products both at manufacturing plants and during equipment operation. Group 2 - fire and explosion hazardous, used for degreasing products by wiping, subject to subsequent complete removal solvents from the internal cavities of fat-free products. When using group 2 solvents, conditions must be met to ensure fire and explosion safety, in accordance with clause 3.9. The used solvents of groups 1 and 2, used at a temperature of 10-20 ° C, depending on the detergent and physico-chemical properties, are given in table. 1. Change No. 1, approved by the Deputy Minister of Chemical and Petroleum Engineering on January 4, 1987, changes were made to subparagraph 2.2.2 of this OST, which will come into force on July 1, 1987. 2.2.2. When degreasing materials other than those listed in Table. 1, tests should be carried out for corrosion compatibility with solvents and for residual greasy contaminants.
Scope of solvents
Table 1
|
Name of solvents |
Residual content of fatty contaminants, mg/m 2 , no more |
Application area |
Group 1 |
Freon 113 GOST 23844 | Freon 114V2 GOST 15899 | Trichlorethylene GOST 9976 |
For steel, cast iron, copper and alloys based on iron, copper and nickel |
Tetrachlorethylene TU 6-01-956 | Trichlorethylene GOST 9976 with stabilizer STAT-1-1% TU 6-01-927 |
For products made of steel, cast iron, copper, aluminum and alloys based on iron, copper, nickel, aluminum |
Tetrachlorethylene TU 6-01-956 with stabilizer STAT-1-1% TU 6-01-927 |
Group 2 |
Nephrases S2-80/120 and SZ-80/120 GOST 443 |
For products made of any metals and alloys |
Nefras-S 50/170 GOST 8505 (distilled) | Gasoline solvent for the paint and varnish industry (white spirit) GOST 3134 |
For preliminary removal of fatty contamination of products from any metals and alloys |
Permissible content of fatty contaminants
2.2.6. When re-degreasing, solvents with a content of fatty contaminants of not more than 50 mg/dm 3 should be used. In the following, solvents that meet the above requirements are referred to as pure. 2.2.7. The use of stabilizer CTAT-1 is mandatory when degreasing products made of aluminum and its alloys, and preferably when degreasing other metals.2.3. Aqueous cleaning solutions
2.3.1. Fireproof non-toxic aqueous cleaning solutions are used for degreasing assembled and disassembled products, the design of which provides the possibility of completely draining the solution and removing its residues by washing with water, both at manufacturing plants and during installation and operation of equipment. Change No. 1, approved by the Deputy Minister of Chemical and Petroleum Engineering on January 4, 1987, changes were made to subparagraph 2.3.2 of this OST, which come into force on July 1, 1987. 2.3.2. The compositions of aqueous cleaning solutions, technological modes and scope with indication of materials are given in Table. 3. Instructions for the preparation of baths with aqueous solutions, their control and adjustment are given in the mandatory Appendix 4. Table 3
Compositions of aqueous cleaning solutions and degreasing regimes
|
Compositions of aqueous cleaning solutions |
Degreasing modes |
Residual content of fatty contaminants, mg/m 2 |
Application area |
components of aqueous cleaning solutions and detergents |
quantity, g / dm 3 |
temperature °C |
degreasing ratio |
Composition 1 |
twice |
For steel, cast iron, copper and alloys based on iron, copper and nickel |
Sodium phosphate, (trisodium phosphate), |
Detergent* |
Sodium hydroxide (caustic soda) |
Liquid sodium glass |
Detergent* |
Composition 2 |
twice |
For steel, cast iron, copper, aluminum and alloys based on iron, copper, nickel, aluminum |
Liquid sodium glass |
Detergent* |
For products made of steel, cast iron, copper and alloys based on iron, copper and nickel, with increased requirements for the absence of deposits on their surface |
Sodium nitrite technical |
Sodium phosphate (trisodium phosphate) |
Detergent* |
Detergent ML-72 |
Synthetic detergent MS-8 |
Detergent KM-2 |
For steel, cast iron, copper, aluminum and alloys based on iron, copper, nickel, aluminum |
twice |
For steel, cast iron, aluminum and alloys based on iron, nickel, aluminum |
Detergent technical synthetic VIMOL |
For products made of copper and its alloys |
Detergent technical TMS-31 |
For products made of steel, cast iron and alloys based on iron, nickel, aluminum |
Detergent technical Vertolin-74 |
once |
Detergent technical Vertolin-74 |
twice |
For steel, cast iron, copper and alloys based on iron, copper and nickel |
once |
For products made of aluminum and its alloys |
Aluminum alloy degreaser (OSA) |
twice |
For steel, cast iron, copper and alloys based on iron, copper and nickel |
Detergents for household chemicals** |
3. Security requirements
3.1. Safety requirements during the degreasing process must comply with GOST 12.3.008. 3.2. When working with the components of aqueous cleaning solutions and solvents, you should comply with the safety requirements set forth in the regulatory and technical documents for the substances used, given in Table. 1 and 3. 3.3. When carrying out degreasing of cryogenic vessels, if the presence of a person in them is required, the requirements of the "Temporary standard instruction for the organization of safe gas hazardous work at enterprises of the USSR Ministry of Chemical Industry", approved by the USSR State Gortekhnazor and the USSR MHP, must be observed. Before carrying out degreasing work on cryogenic vessels that were in operation, they must be warmed up to temperatures in the range of 12-30 ° C and ventilated. Work should be carried out only when the oxygen content in the air inside the vessels is in the range from 19 to 23%. In the organization conducting degreasing, the instructions for carrying out these works must be approved in accordance with the established procedure. 3.4. Degreasing of individual parts by immersing them in baths with solvents should be carried out in apparatus with a closed or semi-closed degreasing cycle, equipped with local ventilation and excluding the ingress of solvent vapors into the air of industrial premises. At the same time, it is necessary to create continuity in the process of degreasing, drying and unloading parts. Drainage of the solvent from the equipment and baths must be carried out in closed vessels through pipelines. 3.5. When degreasing equipment with group 1 solvents (see clause 2.2.1.), it is necessary to ensure the tightness of the equipment in which degreasing is performed. 3.6. Air emissions after drying and blowing must comply with GOST 17.2.3.02. 3.7. The ventilation of the premises must ensure the fulfillment of the requirements for the air of the working area in accordance with GOST 12.1.005. Table 4Maximum allowable concentrations of solvents in the air
|
Name of solvents |
The value of the maximum permissible concentration, mg / m 3 |
Hazard Class |
Trichlorethylene |
Tetrachlorethylene |
Freon 113 |
Freon 114V2 |
Gasoline-solvent for the rubber industry (in terms of C) |
Nefras-S 50/170 |
White spirit (in terms of C) |
4. General technological requirements
4.1. The degreasing process consists of the following operations: - preparation for degreasing; - degreasing; - removal of residues of used degreasing agents. 4.2. Preparation for degreasing. 4.2.1. Before degreasing, the equipment must have a temperature of 12°C to 30°C. If it is technically necessary to carry out degreasing at lower or higher temperatures, a special technological process must be developed in each specific case. Safety valves and instrumentation must be removed from the equipment and degreased separately. 4.2.2. Items coated with conservation lubricants must be depreserved before degreasing with aqueous detergent solutions or solvents in accordance with OST 26-04-2138. 4.2.3. Before degreasing with solvents, in order to avoid corrosion, the products must be thoroughly dried. 4.3. Degreasing. 4.3.1. Degreasing with solvents and aqueous cleaning solutions is carried out by the following methods: - filling the internal cavities of products; - immersion in baths; - circulation of solvents or cleaning solutions in washed products; - condensation of solvent vapors in washed products; - jet cleaning; - rubbing; - ultrasonic cleaning. 4.3.2. Choice of degreasing method according to clause 4.3.1. is produced depending on the dimensions of the products to be degreased and the available technical means degreasing. It is preferable to degrease the products before assembly, taking into account the requirements of clause 1.3. 4.3.3. Degreasing by filling the internal cavities of products or immersion in baths is used for individual parts or assembly units, as well as for small products, and is carried out using solvents and aqueous cleaning solutions. The solvent must be in degreased products for at least 30 minutes. The stay of the solvent in the products should not exceed 1.5 hours. Degreasing with aqueous cleaning solutions is carried out twice with intermediate and final washing with hot water (60-80 ° C), the temperature of the solution is indicated in Table. 3. In each bath with aqueous cleaning solutions, the products should be 30 minutes, in baths with hot water - 15 minutes. Degreasing time composition N 2, table. 3 - 15 minutes. Staying products in contact with aqueous cleaning solutions should not exceed 2 hours. 4.3.4. The method of circulation of solvents or aqueous cleaning solutions is used for degreasing pipelines, hoses, as well as assembled products, the design of which makes it possible to wash all surfaces subject to degreasing (tubular heat exchangers, etc.) with a circulating solution. Degreasing by the circulation method is carried out in the product with solvents or cleaning solutions, the circulation rate is from 0.5 to 1.0 m/s. When circulating the solvent, the following conditions must be observed: - circulation time of at least 20 minutes. and no more than 1.5 hours; - the amount of circulating solvent - not less than the volume of the product, while washing with the solvent of the entire degreased surface must be guaranteed; - the need for repeated degreasing is determined by the results of the analysis of the solvent drained from the product (see clause 5.3.). When circulating the washing solution, the following conditions must be observed: - the duration of circulation is at least 30 minutes, but not more than 2 hours; - the amount of circulating aqueous cleaning solution is not less than the volume of products, while washing the entire degreased surface with the solution must be guaranteed; - degreasing should be done twice with intermediate and final washing with hot water. 4.3.5. The method of degreasing by condensation of solvent vapors is used for degreasing cryogenic vessels, pipelines, hoses and is performed by supplying solvent vapor heated to the boiling point to the degreased cavities, and then condensing the vapor on the degreased surface. The condensate is drained from the equipment. The solvent poured into the evaporator is not subject to requirements for the content of fatty contaminants in accordance with paragraphs. 2.2.5. and 2.2.6. The solvent consumption for a single degreasing is 5-10 dm 3 per 1 m 2 of the degreased surface. Degreasing ends when the content of fatty contaminants in the condensate drained from the product is not more than 20 mg / dm 3, however, in any case, the solvent consumption must be at least 5 dm 3 /m 2. 4.3.6. The jet cleaning method is used for degreasing individual products or the internal surfaces of vessels and is carried out by supplying a solvent or aqueous washing solution to the degreased surface with a jet under high pressure through special nozzles that provide washing of the entire degreased surface. The amount of solvent or aqueous cleaning solution supplied to the surface to be degreased must be at least: for solvents 25 dm 3 /m 2, for cleaning solutions 50 dm 3 /m 2. When degreasing with a jet method, intermediate washing with hot water is not necessary. 4.3.7. The wipe method is used in the absence of special equipment or more effective ways degreasing. This method is used for degreasing large-sized products, cryogenic vessels, if they have hatches, and for small-sized products, subject to free access to the degreased cavities and is performed by repeatedly wiping the degreased surfaces with napkins with hemmed edges moistened with a hot aqueous washing solution at a temperature of 40-45 °C. Subject to compliance with safety requirements, it is allowed to use freon 113 and freon 114B2 or group 2 solvents for wiping small items. 4.3.8. The ultrasonic cleaning method should be used for degreasing products of complex configuration. Degreasing is carried out with group 1 solvents or hot aqueous washing solutions (see Tables 1, 3) in special ultrasonic baths. The duration of degreasing is 10-15 minutes. After degreasing with aqueous detergent solutions, the products are washed with hot water. 4.4. Removal of residues of used degreasers. 4.4.1. Removal of solvent residues from products after their degreasing is carried out by blowing with compressed air or nitrogen, according to clause 2.3.7. For group 2 solvents, only nitrogen is used. The gas used for purge must be heated to a temperature of 60-70°C. By the end of the purge at the outlet of the apparatus, the gas must have a temperature of at least 40-50°C. The duration of the purge depends on the dimensions and shape of the products to be degreased and on the physicochemical properties of the solvents. Purging should be carried out until the smell of the solvent is completely removed. The purge procedure is the same as when warming up equipment from a cold state. It is necessary to exclude the ingress of air contaminated with solvent vapors into the room. 4.4.2. Purging of products intended for the storage and transportation of medical oxygen should be carried out until the solvent vapors in the gas are completely absent; during the control purge, no more than a two-fold gas exchange in the product within 1 hour should be provided. 4.4.3. Removal of residues of aqueous cleaning solutions should be carried out by washing the products with hot drinking water at a temperature of 70-80°C. Rinsing is stopped in the absence of foam in the water and a neutral reaction of the medium (PH-6-8) when checking with universal indicator paper according to TU 6-09-1181. 4.4.4. After degreasing the products with aqueous washing solutions by the "wiping" method, the remains of the solution are removed by rubbing with napkins moistened with warm water at a temperature of 35-40°C. Wiping the surface with napkins moistened with water ends after there are no traces of foam on the wiped surface and on the napkins. The pH of the last wash water should be 6-8. 4.4.5. Before drying products, they must be completely drained of water. Particular attention should be paid to the completeness of the removal of water from the internal cavities and pockets. Drying of metal products washed in water is carried out until complete removal of moisture by blowing with compressed air at a temperature of 100-120°C, and assembly units with non-metal parts at a temperature of 70-80°C. By the end of the purge, the air temperature at the outlet of the apparatus should be no more than 10-15°C lower than the temperature of the supplied air. Natural drying of parts of simple configurations and open surfaces is allowed in compliance with safety regulations. The break between the end of washing and drying of the product should not exceed 10-15 minutes. Spots of white plaque from aqueous washing solutions are allowed with an area of \u200b\u200bno more than 10% of the surface of the washed products.5. Degreasing quality control
5.1. Quality control of degreasing and technological parameters is carried out during the development of the technological process, as well as at the request of the Quality Control Department or the customer's representative. In the absence of control, the quality of degreasing must be guaranteed by the observance of the accepted technology. 5.2. The need to control the degreasing of products, the percentage of controlled products and the chosen method should be specified in the technological documentation. 5.3. Depending on the degreasing method and the design of the product, the quality of the degreasing is controlled by directly determining the content of fatty contaminants on the surface of the product after degreasing or indirectly, by determining the content of fatty contaminants in the solvent, before the control degreasing and in the drained product after the control degreasing, or on the surface of "witnesses". " degreased at the same time as the product. The consumption of the solvent during the control degreasing is 20-30% of the amount required for a single degreasing of the product. 5.4. Quality control of degreasing is carried out in accordance with OST 26-04-2574. 5.5. Temperature control of solutions, temperature and composition of gases is carried out by universal measuring instruments (thermometers, gas analyzers of any type). ______________________________ * An example entry is preferred.Annex 1
Reference
Explanation of terms
|
Explanation |
|
|
Degreasing |
Technological operation of reducing the content of fatty contaminants to the standards established by regulatory and technical documents or technical documentation. |
|
Skim equipment |
Equipment, the content of fatty contaminants on the surface of which meets the standards. |
|
Pollution |
According to GOST 24869. |
|
Fat contamination |
Pollution consisting of mineral oils and other fatty substances. |
|
The amount of grease contaminants per unit surface of the product. |
Appendix 2
Features of degreasing various types of equipment
1. General Provisions
1.1. Equipment operating with oxygen in accordance with GOST 5583 and GOST 6331 is not degreased during operation, with the exception of liquid oxygen evaporators and other equipment in which fatty contaminants can enter oxygen. 1.2. Equipment operating with oxygen containing 0.01 mg / dm 3 of fatty contaminants or more must be degreased after the amount of fatty contaminants calculated by the formula reaches the normWhere S- inner surface of the vessel, m 2 ; v- volume of oxygen filled or pumped into the vessel, dm 3 ; C - the content of fatty contaminants in oxygen, mg / dm 3; n- number of vessel fillings; m- permissible content of fatty contaminants according to OST 26-04-1362 or GOST 12.2.052, mg/m 2 . The equipment passport or other document should record the amount of oxygen passed through and the content of fatty contaminants in it. By change No. 2, this appendix was supplemented by clause 1.3 1.3. The need for degreasing of oxygen service equipment can be determined by a control degreasing. If the design of the product allows, control degreasing should be carried out in places of the most probable deposition and accumulation of fatty contaminants. It is allowed not to degrease the equipment if the oil content does not exceed the values regulated by the normative and technical documents specified in clause 1.1. of this standard.
2. Degreasing air separation units
2.1. Degreasing of separation units in assembly is carried out only with group 1 solvents (see Table 1) of the standard. The use of group 2 solvents for these purposes is not permitted. 2.2. The amount of solvent required for degreasing depends on the size of the separation unit and the degree of oil contamination. The approximate amount of solvent required for a single flush of some blocks is given in table. 1. Table 1Estimated solvent consumption for a single flush of air separation units
2.3. To avoid corrosion, before degreasing with solvents, all apparatuses of separation units must be thoroughly dried. 2.4. Before degreasing the air separation units, the equipment must be checked for tightness and all detected gaps must be eliminated. 2.5. Degreasing of communications and internal cavities of heat exchangers is carried out by circulation of the solvent in the washed cavities for 1-1.5 hours. 2.6. Degreasing of apparatuses (condensers, lower column cube, regenerators, etc.) is carried out by filling with a solvent up to 3/4 of the volume, followed by bubbling with air or nitrogen for 1-1.5 hours or by condensing solvent vapors. 2.7. The adsorbers are degreased after the adsorbent is removed from them by wiping the adsorber body and basket. It is not allowed to degrease assembled acetylene adsorbers. 2.8. The degreasing of the filter elements of expander filters is carried out with aqueous washing solutions, for example, in washing machines, or by circulating a solvent through the filter element in a special device. It is not allowed to degrease the filter fabric by hand washing in a solvent.3. Degreasing of cryogenic vessels, cylinders and transport tanks
3.1. Vessels of liquid medical oxygen are degreased upon detection of fatty contaminants in liquid oxygen in an amount of 0.01 mg/dm 3 or more, confirmed in five successive analyzes. 3.2. Vessels and cylinders are degreased by filling with a solvent up to 1/3 of the vessel, followed by rotation or rocking in a special device. The specified equipment can also be degreased with a hot aqueous cleaning solution, filling the equipment with it or washing its walls by the jet method. 3.3. For degreasing transport tanks and vessels, the method of condensation of solvent vapors can be used. Before degreasing transport tanks and vessels by this method, the evaporators that complete them should be removed, which are degreased separately. In the vessel, pre-heated to a temperature of 30-40°C, solvent vapor is fed through the "fill-empty" valve. Air is expelled from the vessel through the gas relief valve during the first hour of solvent vapor supply. The condensate drains to the bottom of the vessel. If the pressure in the transport tank or vessel rises above 0.05 MPa (0.5 kgf / cm 2) when the solvent vapor is supplied, the vessel should be cooled by blowing cold air or nitrogen until the outlet gas temperature drops to a temperature of 293- 298 K (20-25°C), then continue degreasing. The condensate is drained and the content of fatty contaminants in it is determined. Degreasing is completed when the content of fatty contaminants in the drained solvent is not more than 20 mg/DM 3 . 3.4. Vessels and cylinders with hatches can be degreased by washing their walls with a jet method or wiping the inner walls of the vessels with cloth napkins moistened with a hot aqueous washing solution; after wiping, the remaining solution is drained through the bottom drain. The evaporator and lower drain communications are washed again with a clean solution. 3.5. When degreasing vessels using the “wiping” method, the following rules must be observed: - before degreasing, a vessel that has been in operation must be warmed up in accordance with clause 3.3. standard; — workers performing degreasing should be instructed on the rules and safe methods of working inside enclosed apparatus; - the person responsible for carrying out the degreasing must inspect the place of work and make sure that the vessel is warmed up and prepared for work; - when working, the requirements of the "Temporary standard instruction for the organization of safe gas hazardous work at enterprises of the USSR Ministry of Chemical Industry", approved by the USSR Gosgortekhnadzor and the USSR MHP, must be observed.4. Degreasing liquid oxygen pumps
4.1. Parts of liquid oxygen pumps are degreased by immersion in baths, preferably with aqueous cleaning solutions, in accordance with the instructions in paragraph 4.3.3. standard. 4.2. Communications to the pump are degreased by circulating an aqueous washing solution or solvent or condensing solvent vapors in accordance with the instructions in section 8. 4.3. Flake graphite is degreased with a solvent in a separate vessel. After thorough mixing, the solvent is drained off, and the graphite is poured out and dried in the open air or in an oven until the smell of the solvent is completely removed.5. Degreasing of gasification plants
5.1. Vessels of warm and cold gasifiers are degreased by filling with a solvent, followed by bubbling nitrogen or air. 5.2. Evaporators of gasification plants are degreased by circulation of solvents through them. The frequency of degreasing of evaporators operating with liquid oxygen in accordance with GOST 6331 is determined by formula 1, clause 1.2. while the content of fatty contaminants in oxygen is assumed to be 0.01 mg/dm 3 . Degreasing of gasifiers at a pressure of 15 MPa (150 kgf / cm 2) should be carried out at least after 1000 hours of plant operation.The paragraphs are numbered according to the source.
5.4. After degreasing and purging the medical oxygen gasifier, the gaseous product is released into the atmosphere for 1 hour without increasing the pressure.6. Degreasing of cryogenic cold gasifiers of the GKH type
6.1. When the gasifier is operating on oxygen according to GOST 6331, the control degreasing of one of the evaporators is carried out after the mass of oxygen passes through the gasifier, determined by the formula:Where M- mass, t; F- internal area of the gasifier panel, m 2 . Control degreasing is carried out with solvents of group 1 of the table. 1 standard in the amount of 20-30% of the total volume to be filled. After the control degreasing, the content of fatty contaminants in the solvent is determined according to OST 26-04-2574. 6.2. Degreasing of the remaining evaporators is carried out if the content of fatty contaminants exceeds the allowable standards according to 26-04-1362. Degreasing is carried out by the method of circulation with a solvent of group 1 of the table. 1 standard. 6.3. When using oxygen containing fatty contaminants more than 0.01 mg / dm 3, the gasifier (reservoir, valve cabinet, evaporators and pipelines) is degreased after the mass of oxygen, determined according to clause 1.2, passes through the reservoir. 6.4. Degreasing of the gasifier tanks is carried out by the method of condensation of solvent vapors in accordance with clause 4.3.5. standard. Evaporators are degreased using the solvent circulation method. Degreasing ends when the content of fatty contaminants in the drained condensate is not more than 20 mg/dm 3 .6.5. Spindle groups of fittings are degreased by wiping with aqueous detergent solutions. 6.6. Degreasing of spindle groups of fittings with solvents of group 1 tab. 1 standard is not allowed. Degreasing of evaporators with aqueous cleaning solutions is not allowed. 6.7. After degreasing, the gasifier is purged until the solvent residues are completely removed. Completeness of solvent removal should be verified by analysis. Purge of the medical oxygen gasifier should be carried out until the complete absence of solvent vapors in the gas during the control purge (no more than 2 mg/m3). 6.8. When oxygen is used in the gasifier in accordance with GOST 6331, degreasing of the tank, valve cabinet and pipelines is not performed.
7. Degreasing oxygen compressors
7.1. Small parts are degreased in accordance with clause 4.3.3. standard. 7.2. Degreasing of valves with solvents should be carried out only in disassembled form. 7.3. Large parts, for example, a cylinder, a cover, rods, pistons, etc., are degreased in baths with an aqueous washing solution or solvent, or by wiping the surfaces with cloths moistened with low-toxic solvents (see clause 4.3.7. of the standard) or hot water detergent solution. 7.4. Shell-and-tube refrigerators, moisture separators, receivers and other containers are filled with 1/3-1/2 volume of solvent, after which they are turned over. If the parts are degreased after depreservation, two or three times washing of the parts with a solvent is necessary. It is recommended to degrease these devices by solvent vapor condensation or to wash them with a hot cleaning solution (see clause 4.3.5. of the standard). 7.5. Coil coolers are degreased with a solvent or hot cleaning solution by circulation or filling (see clause 4.3.4.; 4.3.3. of the standard). 7.6. After degreasing, the compressor must be run in air or nitrogen for 2 hours. 7.7. Degreasing of oxygen turbocompressors is carried out in accordance with RTM 26-12-43.8. Degreasing pipelines and hoses
8.1. The need for degreasing assembly pipelines with a pressure of more than 4.0 MPa (40 kgf / cm 2) is determined by the technical documentation, it is recommended to make a decision on degreasing after checking the open ends of the pipeline, in accordance with OST 26-04-2574. 8.2. Liquid oxygen pipelines are checked for the presence of fatty contaminants at least once a year, in the case when oxygen with a content of fatty contaminants higher than the requirements in accordance with GOST 6331 is transported through it. - entrance areas. Control is carried out according to section 5 of the standard. In case of exceeding the standard OST 26-04-1362, the entire pipeline is subjected to degreasing. 8.3. When degreasing by immersion in baths, the pipes are placed in special baths filled with aqueous cleaning solutions or solvents and kept in accordance with the instructions in clause 4.3.3. standard. 8.4. For circulation degreasing, pipelines are connected to a special system equipped with a pump, through which aqueous cleaning solutions or solvents are pumped (see clause 4.3.4. of the standard). 8.5. Degreasing the inner surface of the pipes by filling is carried out as follows: technological plugs are installed on the ends of the pipes. A solvent is poured through the appropriate fitting in the plug, after which the fitting is closed, and the pipes or hoses are laid horizontally. The pipes should be in a horizontal position for 10-20 minutes, during which time they should be turned 3-4 times in order to wash the entire inner surface with a solvent. Pipes filled with solvent can also be moved in special rocking chairs or rotary mechanisms. 8.6. The sections of the installed pipeline are degreased by circulating a solvent or an aqueous cleaning solution. 8.7. The approximate solvent consumption required for a single degreasing of the inner surface of one linear meter of pipe is calculated by the formula:
(2)
Where Q- solvent consumption, dm 3 /m; D- inner diameter of the pipe, see Solvent consumption for a single degreasing of pipes is given in Table. 2. Table 2
Solvent consumption for single pipe degreasing
Continuation of the table. 2 Continuation of the table. 2 8.8. Small sections of pipelines can be degreased by wiping or jetting with an aqueous cleaning solution using special tools. 8.9. The outer surfaces of the ends for a length of 0.5 m during installation are wiped with napkins soaked in a solvent or an aqueous washing solution and dried in the open air. 8.10. All parts intended for connecting hoses to the tank must be degreased by wiping, if they were contaminated during storage. 8.11. Hoses of medical oxygen tanks are degreased together with the vessel. 8.12. Fat-free sections of pipelines to be stored or transported must be plugged and sealed. 8.13. Sections of pipelines subjected to chemical passivation or other types of chemical surface treatment before assembly may not be degreased if the requirements of clause 1.3 are met. standard. 8.14. Sections of pipelines and hoses, degreased during manufacture, received for installation with plugs and having the appropriate marks in the passport, are not degreased. 8.15. Assembly pipelines are not subjected to degreasing, with a pressure of up to 4.0 MPa (40 kgf / cm 2), if sections of pipelines before assembly or assembly pipelines were cleaned from scale, slag, etc. by pickling, sandblasting and shot blasting. 8.16. The main pipelines and intershop pipelines of oxygen, with a pressure of up to 1.6 MPa (16 kgf / cm 2), as an assembly are not degreased if, before connecting individual pipes, visual inspection confirms the absence of stains of fatty contamination on the surface of the pipelines, for which an act must be drawn up .9. Degreasing fittings and appliances
9.1. Degreasing is carried out after manufacture, before installation and after repair, i.e. in cases where contamination of the fittings was possible. 9.2. The fittings are degreased in disassembled form with aqueous detergent solutions. It is allowed to pre-wipe with a cloth soaked in white spirit or kerosene. In this case, special attention should be paid to fire safety measures. 9.3. In case of technical necessity, it is allowed to degrease the fittings without dismantling. To determine the possibility of degreasing the purchased fittings without dismantling, it is recommended to degrease it, dry it, and then disassemble and check for the residual content of fatty contaminants. If the residual content complies with the standards, in accordance with clause 1.1. standard, further fittings can be degreased without dismantling. Particular attention should be paid to the stuffing box and its packing. 9.4. When degreasing fittings without dismantling, the compatibility of all materials from which the fittings are made, especially seals, with the detergents used should be taken into account. 9.5. The valve is not subject to degreasing before its installation, if the degreasing was carried out at the factory (which must be confirmed by the accompanying documents or appropriate branding) and the packaging is not broken. 9.6. Gaskets made of rubber, paronite, fiber, fluoroplastic gland rings, parts made of fiberglass, polycarbonate and textolite are degreased by wiping with aqueous detergent solutions and rinsed with water. 9.7. Asbestos used for gland packing of fittings is degreased by calcination at a temperature of 300°C for 2-3 minutes. 9.8. Degreasing of devices for measuring flow and pressure is carried out according to OST 26-04-2158.Appendix 3
Mandatory
Solvent Requirements
Input control|
Name of indicator |
Control method |
1. Appearance | Colorless, clear liquid | Determined visually | 2. The content of mechanical impurities and water | It must be transparent and not contain foreign impurities suspended and settled on the bottom of the cylinder. | Pour the solvent into a glass cylinder with a diameter of 40-50 mm | 3. Reaction of the environment | The water layer should not turn pink | The solvent in the amount of 15 cm 3 is placed in a separating funnel, 40 cm 3 of distilled water are added and shaken for 3-5 minutes; after settling, the aqueous layer is drained and methyl orange 0.1% is added to it water solution | 4. Oil content | Section 2 of the standard, tab. 2 | According to OST 2 6-04-2574 |
Appendix 4
Mandatory
Preparation of baths with aqueous cleaning solutions, their control and adjustment
1. Composition of baths
1.1. The amount of each component provided by the recipe is calculated based on the composition of the baths and its useful capacity. The components of the solution, depending on local conditions, can be dissolved individually in auxiliary vessels or directly in the bath in which the degreasing is carried out. Dissolution is carried out by heating to a temperature of 60-70°C with vigorous stirring of the solutions with mechanical agitators or air bubbling. 1.2. After drawing up the bath, determine the total alkalinity of the freshly prepared composition according to the method below.2. Control and adjustment of baths
2.1. General requirements
2.1.1. Control analyzes of the composition of aqueous detergent solutions in degreasing baths are carried out at least 2 times a week by determining the total alkalinity of the solution. Baths are adjusted according to the results of control analyses. The general change of the aqueous washing solution with regular loading of the bath is carried out once a week. 2.1.2. When using the baths, do not allow the accumulation of contaminants on the surface of the solutions. Regularly remove grease from the surface using special tools (perforated spoon or mesh) or special grease traps. 2.1.3. Before taking a sample of the solution for control analysis, it is necessary to bring the solution to the desired level and mix.
2.2. Determination of the total alkalinity of a solution
Amendment No. 1, approved by the Deputy Minister of Chemical and Petroleum Engineering on January 4, 1987, amended subparagraph 2.241 of this Appendix, which shall enter into force on July 1, 1987.Amendment No. 2 to subparagraph 2.2.1 of this appendix has been amended 2.2.1. Used reagents, solutions and utensils: - hydrochloric acid, according to GOST 3118, 0.1 m solution; - methyl orange indicator according to TU 6-09-5171, 0.1%; - distilled water, according to GOST 6709; - conical flasks, according to GOST 25336, with a capacity of 250 cm 3; - measured pipettes, according to GOST 1770, with a capacity of 100 cm 3; - measuring burette, according to GOST 1770, with a capacity of 25 cm 3. 2.2.2. To carry out the determination, 5 cm 3 of a cooled aqueous washing solution is placed in a 250 cm 3 conical flask, diluted with water to 100 cm 3, 2-3 drops of methyl orange solution are added and titrated with 0.1 N, HCl until the yellow color changes to pale pink. 2.2.3. The total alkalinity of the solution in terms of NaOH in g / dm 3 is calculated by the formula:
Where q- amount of 0.1 n solution HCl, spent on titration, cm 3; 0.004 - solution titer HCl, G; TO- correction to the titer of 0.1 N solution HCl;m- the amount of solution taken for analysis, cm 3.
2.3. Bath adjustments
2.3.1. According to the results of control analyzes, the baths are adjusted if the total alkalinity of the solution decreases by more than 20%. 2.3.2. When adjusting, all components of the solution are added to the bath. The calculation of the added amount is carried out according to the main component, which determines the total alkalinity of the solution. For example, by control analysis composition baths: NaOH - 10 g; Na 3 PO 4 -15 g; Na 2 SiO 3 -2 g; OP-7 - 2-3 g; H 2 O - 1 dm 3 total alkalinity decreased by 35%. When adjusting, it is necessary to add to the bath based on 1 dm 3: NaOH - 3.5 g; Na 2 SiO 3 - 0.7 g; Na 3 PO 4 - 5.2 g; OP-7 - 0.7-1 g. Amendment No. 2 amended this ListAmendment No. 1, approved by the Deputy Minister of Chemical and Petroleum Engineering on January 4, 1987, amended this List, effective from July 1, 1987.
List of reference normative and technical documents (NTD)
|
Designation |
Name |
Sheet (page) |
GOST 9.010-80 |
ESZKS. Compressed air for spraying paints and varnishes. Technical requirements. Rules and methods of control |
GOST 9.305-84 |
E C 3 COP. Metallic and non-metallic, inorganic coatings. Operations of technological processes for obtaining a coating |
GOST 12.1.001-83 |
SSBT. Ultrasound. General safety requirements. |
GOST 12.1.004-85 |
SSBT. Fire safety. General requirements. |
GOST 12.1.014-84 |
SSBT. Work area air. Method for measuring the concentration of harmful substances with indicator tubes. |
GOST 12.1.016-79 |
SSBT. Work area air. Requirements for methods for measuring concentrations of harmful substances. |
GOST 12.1.019-79 |
SSBT. Electrical safety. General requirements. |
GOST 12.2.052-81 |
SSBT. Equipment operating with gaseous oxygen. General safety requirements |
GOST 12.3.008-75 |
SSBT. Production of metallic and non-metallic inorganic coatings. General safety requirements. |
GOST 12.4.011-89 |
SSBT. Means of protection for workers. Classification. |
GOST 12.4.026-81 |
SSBT. Signal colors and safety signs |
GOST 17.2.3.02-78 |
Protection of Nature. Atmosphere. Rules for Establishing Permissible Emissions of Harmful Substances by Industrial Enterprises |
Trisodium phosphate. Specifications. |
Nephrases S2-80/120 and SZ-80/120. Specifications. |
GOST 1770-74E |
Ware measured laboratory glass. Cylinders, beakers, flasks. Specifications. |
GOST 22 63-79 |
Sodium caustic technical. Specifications. |
GOST 2874-82 |
Drinking water. Hygienic requirements for quality control. |
GOST 3118-77 |
Hydrochloric acid. Specifications. |
GOST 3134-78 |
Gasoline solvent for the paint and varnish industry. Specifications. |
GOST 4328-77 |
Reagents. sodium hydroxide. Specifications. |
GOST 4753-68 |
Kerosene lighting. Specifications. |
GOST 5583-78 |
Oxygen gaseous technical and medical. Specifications. |
GOST 6331-78 |
Oxygen liquid technical and medical. Specifications. |
GOST 6709-72 |
Distilled water. |
GOST 8505-80 |
Nefras-S 50/170. Specifications. |
GOST 9293-74 |
Nitrogen gaseous and liquid. Specifications. |
GOST 9337-79 |
Sodium phosphate 12-water. Specifications. |
GOST 9976-83 |
Trichlorethylene technical. Specifications. |
GOST 2533 6-82 |
Ware and laboratory glassware. Type, main parameters and dimensions. |
GOST 10652-73 |
Ethylenediamine disodium salt - N, N, N ¢, N ¢ tetraacetic acid, 2-water (Trilon-B). |
GOST 13078-81 |
Liquid sodium glass. Specifications. |
GOST 15899-79 |
Freon 114V2. Specifications. |
GOST 19906-74 |
Sodium nitrite technical. Specifications. |
OST 26-04-13 62-75 |
OST 26-04-2138-81 |
Temporary anticorrosive protection of products. |
OST 26-04-2158-78 |
SSBT. Means for measuring flow and pressure. Safety requirements for use in an oxygen gas environment. |
OST 26-04-2574-80 |
Gases, cryogenic products, water. Methods for determining the content of mineral oils. |
OST 26-04-2578-80 |
Gases, cryoproducts. Chromatographic method for the determination of impurities in organochlorine solvents. |
OST 26-04-2600-83 |
The equipment is cryogenic. General specifications. |
RTM 26-12-43-81 |
Degreasing of centrifugal oxygen compressors. |
TU 6-01-927-76 |
Trichlorethylene stabilizer (STAT-1) . |
TU 6-02-640-80 |
Nonionic drug synthamide-5. |
TU 6-09-1181-76 |
Universal indicator paper for determining pH 1-10 and 7-14. |
TU 6-09-5171-84 |
Indicator methyl orange (para-dimethylanino-azobenzenesulfonic acid sodium) |
TU 6-01-956-86 |
Tetrachlorethylene (perchlorethylene) |
TU 6-14-577-88 |
Detergent Sintanol DS-10 |
TU 6-15-978-76 |
Synthetic detergent HC-8. |
Preparation KM-2. |
TU 38.103 62-87 |
Surfactant NEONOL AF9.12 |
TU 38-10761-75 |
Synthetic detergent Vimol. |
Detergent technical Vertolin -74. |
TU 38-107113-78 |
Detergent technical TNS-31. |
TU 38.50724-84 |
Websites, like flowers and cars, need care. If the site is launched and no one cares about it, then sooner or later it will stop working. But the site is not just text and pictures, it is the face of the company on the Internet, a sales channel. And when the site stops working at first glance, nothing happens, but over time, there are fewer calls and customers. Those who visit your site will think that the company has closed - because its site is no longer working. Those who searched for your company on the Internet will not be able to find it - again, the site does not work. Only competitors will be happy.
"We ordered a site from our local web studio, paid for everything, and now our site is gone. The web studio does not pick up phones, does not answer letters, we came to their office - it turns out they moved out a long time ago." Unfortunately, this is a common situation. It still happens "a programmer worked on our site, he quit with all the passwords", "the company was reorganized, while they were sorting out the business, they lost the site" and of course "I don't understand anything about these internets of yours, help fix our site."
"My company, LLC YugPodzemCommunications, is engaged in laying and maintaining external pipelines, the site was made for us by local Krasnodar developers back in 2008 and everything was fine - they followed it, updated it, it was easy to find it in Yandex. But I don’t know what happened - either there is a crisis, or they are tired of doing their own thing - an employee comes up to me and says - Andrey Yuryevich, our site is not working, today the second client has already told about it. I call the programmers - and there "the phone is not available." Site address on business cards everywhere, on official cars. What to do. I called my friends - they gave me the contact of the St. Petersburg guys, fixed the site for me and maintain it. Thank you! Sincerely, A.Yu. Mostovoy. "- client site ugpc.ru
STEPS TO RESTORE THE SITE:
Call us at 8-800-333-16-58 or write an e-mail [email protected] to clarify the cost and terms of work. Restoring a domain and a website is not cheap, but the company's reputational losses and the cost of creating a new website are much higher than the cost of restoration work. The basic term for re-registration of a domain is 3 business days, site restoration - 5 business days.
Fill out a form for a domain for an individual (download the form) or send us the details of your legal entity. For works, the cost of which is from 7000 rubles. it is possible to conclude an agreement (download the agreement). You pay for work.
What is a domain:
A domain is the address of a site on the Internet, a set of letters and numbers, like a phone number. The address of our site is dra.ru, the address of Vkontakte is vk.com, the address of Yandex is yandex.ru. Domains are registered and maintained by domain registrars. Every website on the internet has its own domain. Your site has the same, only now the domain is down and needs to be restored.
To whom the domain is registered:
To an individual or entity at your request. If you are a sole trader, then in terms of legal status domains, the domain is issued to you as an individual. For some domain registrars, registration for non-residents is also possible Russian Federation(foreign individuals and companies).
Who owns the domain:
A domain is not an object of property rights (like an apartment or a car), therefore, from a legal point of view, it does not have an owner. Domain - an entry in the registry of a domain registrar that has an Administrator, who, in fact, is the owner (manages the domain, renews, can transfer the domain to another administrator). You can check who is the domain administrator through the Whois service at the registrar, for example, in Axelname - if the field Org: says KreoBits or CreoBits - then the domain is with us, if Private person - it means the domain is with a private person (in accordance with Federal Law-152 on personal data, the registrar does not have the right to indicate the full name in the public data and therefore "Private person" is written for all individuals).
We create an account (agreement) with an accredited domain registrar according to your profile of an individual or details of a legal entity and carry out registration of the domain for you. We create a new hosting for the site and rebuild the site pages with text and pictures on modern system site management MODx. As a result, we get a fully working site that looks and is filled in the same way as the site that you had before. We give you passwords for the domain, site editor and hosting.
What is hosting:
In order for the site to be accessible via the Internet, it must be placed on an Internet server (specialized computer). This service is called hosting"(from English. hosting). Technically, a site is a set of files, it is hosted and becomes available from any device connected to the Internet. If the hosting is good, then the site is always available, works quickly and does not break. If the hosting is bad, the site will work slowly and intermittently. We host restored sites on equipment in the Selectel data center (Moscow), one of the best hosting providers in the Russian Federation.
What is MODx:
MODx is a site management system from English. Content Management System (CMS). It is needed for the site to work, drawing an analogy - just like Windows is a system for managing a computer, and Android is for a smartphone and tablet, so MODx is the same thing, only for the site. But unlike Windows and Android, there are hundreds of content management systems for websites of different purpose and complexity, the most common of which are 1C-Bitrix, UMI.CMS, Wordpress, Joomla and MODx. The main task of MODx, like any other CMS, is to ensure the operation of the site and convenient tools for editing it by the programmer and editor (for example, the manager of your organization). CMS are paid and free, MODx is free, all management is in Russian.
What we will restore:
Everything that we can restore, including the design of your site, its content (texts, pictures), functionality - structure, menu, search, catalog, form feedback. It's like recovering data from a broken computer ( hard drive), if the specialist is good, he will restore all the files as they were.
WHAT GUARANTEES?
We are a small company, we have been working since 2007, we value every client and value our reputation. Our guarantees:
- our company is not a one-day company, we are already 9 years old, it is easy to check, make an online statement of the Unified State Register of Legal Entities for CreoBits LLC (TIN 7840363309). you can also look at the arbitration practice ("cases in court") in our organization, for 9 years of work there are only two of them, one of which we won, and the second is in process.
- works for amounts from 7000 rubles. performed under contract
- DRA is a registered trademark - .
- gratitude to our organization from the authority -. We have been working with the Committee for Nature Management for 7 years already, we maintain and develop their website.
 |  |
 |
 |
 |
 |
We ask you to be vigilant, because scammers work on our behalf, who do not hesitate to introduce themselves as CreoBits/DRA.RU employees and promise assistance in restoring websites and domains for a modest (or completely immodest) fee. Remember, we write only from @dra.ru addresses, for example, from addresses [email protected], [email protected] and if you received a letter from some other address, for example, [email protected] then they are scammers. Just call us at 8-800-333-16-58 and clarify all the questions about restoring the site. Our site dra.ru
