Some standard content:
Petroleum and natural gas industry standard of the People's Republic of China Liquid Epoxy Coatings for Steel Tanks
Technical standard of liquid eroxyinternal cating for steel tankSY/T 0319—98
Editor: Engineering Technology Research Institute of China National Petroleum CorporationApproval department: Petroleum Industry Press, State Bureau of Petroleum and Chemical Industry
1999Beijing
Carboxylic epoxy coatings
Grades and structures of anti-corrosion coatings
Construction of anti-corrosion coatings
General provisions
Surface neck treatment
Coating preparation
Chufu process
Quality inspection
General provisions
Quality inspection during construction
Final quality inspection of internal anti-corrosion coating…
Repair, recoating and repainting
Health, safety and environmental protection.
8 Delivery Documents
Appendix A Test Method for Water Vapor Permeability of Liquid Coating Anti-corrosion Layer Standard Wording and Phrases
Appendix Explanation of Technical Standards for Internal Anti-corrosion Layer of Liquid Epoxy Coating for Steel Storage Tanks
Document of State Administration of Petroleum and Chemical Industry
State Petrochemical Administration (1999) No. 93
Notice on the Approval of 45 Petroleum and Natural Gas Industry Standards, including the "Specifications for Construction and Acceptance of Oil and Gas Pipeline Engineering"
China National Petroleum Corporation:
The draft of the 45 petroleum and natural gas industry standards, including the "Specifications for Construction and Acceptance of Oil and Gas Pipeline Engineering", submitted by your company for approval has been approved by our bureau and is now published: The name and number of the standard are:
Mandatory Standard
SY 0401--98
SY 045398
SY51311998
SY 6360--1998
Recommended standard
SY/T 031898
Specification for construction and acceptance of oil and gas pipeline projects (replacing SYJ4001-90)
Standard for quality inspection and assessment of petroleum construction projectsOil gathering and transportation pipeline projects (replacing SY4053-93)Safety regulations for radioactivity measurement and radiation protection of petroleum (replacing SY 5131--87)
Safety regulations for polymer injection mining in oil fields
Standard for seismic isolation technology of oil-containing floating equipment
SYr 0319-98
SYrT 0320-98
SY1 037998
$Y/T 0403-98
SY/T 040498
SYI 041498
SY/T 0443—98
SY/T 0444--98
SY/I 0469—98
SY/T 0510--1998
SY/T 50 72—-1998
SY/T 5106--1998
Technical standard for inner anticorrosion layer of liquid anoxic coating for steel storage tanks
Technical standard for outer anticorrosion layer of chlorosulfonated polyethylene for steel storage tanks
Technical standard for outer anticorrosion layer of coal tar enamel for buried steel pipelines (replacing SYJ40079-93)
Construction and acceptance specification for oil pump group (replacing SYJ4003-90)
Construction and acceptance specification for heating furnace engineering (replacing SYJ 4004-90)
Technical standard for polyethylene adhesive tape anti-corrosion layer of steel pipeline (replaces SYJ4014-93)
Technical standard for penetration detection of normal pressure steel welded storage tanks and pipelines (replaces SY] 4043-89)
Technical standard for magnetic particle detection of normal pressure steel welded storage tanks and pipelines (replaces SYI4044-89)
Quality inspection and assessment standard for petroleum construction projectsProduction of steel containers and heating furnaces in oil fields (replaces SY406993)
Steel butt welding pipe fittings. (replaces SY751087)Technical conditions for petroleum vans (replaces SY 507285)
General technical conditions for packers used in oil and gas fields (replaces SY 5106-86)
SY/T 51701998
SY/F 53591998
SY / T 5367-1998 | | tt | tt||SY/T 6362--1998
SY/1 63631998
SY/T 6364--1998
SYT 63651998
SY/T 63661998
SY/T 6367-1998
Specification for steel wire rope for petroleum and natural gas industry (replaces SY 5170-92, SY 5028—91) Original demulsifier SP169 (replaces SY5359
Method for calculating recoverable reserves of petroleum (replaces SY5367—89)
Hollow sucker rod (replaces SYT5550—92)Low energy crude oil water content analyzer (replaces SYT556693)
Classification and model compilation method of downhole tools for oil and gas production (replaces SY562993)
Physical labor intensity classification for field operations in petroleum production and gas production and water injectionGuidelines for health, safety and environmental management systems in mines
Guidelines for health, safety and environmental management systems for downhole operations in petroleum and natural gas
Technical requirements for unstable tests
Method for describing properties and distribution of reservoir fluids
Method for determining the original formation pressure and pressure system of oil and gas reservoirs
Main production technical indicators and calculation methods for oilfield development
Inspection, maintenance, repair and restoration procedures for drilling equipment
This standard is prepared in accordance with the requirements of (97) CNPC Technical Research Institute No. 42, edited by the Engineering Technical Research Institute of China National Petroleum Corporation, Shengli Petroleum and other oil construction bureaus.
During the preparation of this standard, the members of the preparation team followed the relevant national policies and conducted extensive investigations and research, summarized the design and application experience of the internal anti-corrosion layer of steel storage tanks in the oil industry over the years, formed a draft for soliciting opinions, and widely solicited opinions from relevant units and experts in two ways: annual review and joint review. The main issues were repeatedly revised, and finally the Petroleum Engineering Construction Professional Standardization Committee reviewed and finalized it together with relevant departments.
The main contents of this standard include: general principles, liquid epoxy anti-corrosion coatings, anti-corrosion layer grades and structures, anti-corrosion layer construction, quality inspection, repair, restoration and re-use, health safety and environmental protection, and delivery materials. This standard is formulated by the Engineering and Technology Research Institute of China National Petroleum Corporation.
This standard is compiled by the Engineering and Technology Research Institute of China National Petroleum Corporation.
This standard is compiled by the Oil Construction Company of Shengli Petroleum Administration Bureau. The main drafters of this standard are Zhang Liping, Lin Zhu, Zhang Qibin, Liu Derun, Li Lijun, and Zhang Guiying.
1.1 This standard is formulated to ensure the quality of the internal anti-corrosion layer of liquid epoxy coatings in steel storage tanks and extend the service life of steel storage tanks.
102 This standard is applicable to the design, construction and acceptance of the internal anti-corrosion layer of epoxy coatings on the inner wall of steel storage tanks with a storage medium of crude oil, refined oil, and sewage, with a leakage of not more than 100 and a design pressure of not more than 1.6MPa. 13 The design, construction and acceptance of the internal anti-corrosion layer of liquid epoxy coatings in steel storage tanks shall not only comply with this standard, but also comply with the provisions of the relevant current national mandatory standards. 2 Liquid Epoxy Coatings
2.0.1 The primer, topcoat (intermediate paint) and curing agent diluent of liquid epoxy coatings should match each other and should be supplied by the same manufacturer. The colors of primer and topcoat should be different.
2.0.2 The performance indicators of liquid epoxy resin coatings (excluding epoxy glass flake coatings) should comply with the provisions of Table 2.0.2-1. The performance indicators of epoxy glass flake coatings should comply with the provisions of Table 2.0.2-2. The performance indicators of liquid epoxy coating anti-corrosion layer should comply with the provisions of Table 2.0.2-3c
Table 2.0.2-1
Viscosity (coating-4 cup, s)
Fineness (urn)
Solid content (%)
Surface dry ()
Actual dry (h)
Adhesion (grade)
Flexibility (nim)
Impact resistance (cm)
Performance index of liquid epoxy resin coating
Topcoat (medium varnish)
Test method
(G3/T1723—1993 (second edition)
G13[1724---1979
(1989 revision)
GB/T 1725—1979 (registration)
(1989 confirmation)
GB/T 1728—1979
【Confirmed in 1989】
GB/T1720—1979
（Confirmed in 1989）
GB/T 17311993
GB/T 1732—1993
Serial number!
Table 2.0.2-2
Solid content (%)
At (h)
Dry (h)
Shear strength (MPa)
Water vapor permeability
[gr (md-kPa)
Performance index of epoxy glass flake coating
Topcoat (4-moisture paint)
Test method
GB/T 1725—1979 (Method A)
(Confirmed in 1989)
CB/T 1728-1979
(Confirmed in 1989)
SY/T 0041-1997
Appendix A to this standard
Performance index of liquid epoxy coating anticorrosive layer
Table 2.0.2-3
Electrical strength (MV/m)
Surface resistivity (n)
Volume resistivity (2-m)
Salt resistance (500h)
Water resistance (100, 72h)
Sewage resistance (100, 72h)
Gasoline resistance (normal temperature, 30g)
Source oil resistance
(80c, 3)
10%HS0 (room temperature, 30d)
10%NaOH (room temperature, 3d)
10 % Na0 (air temperature, 30d)
Non-antistatic coatingAntistatic coating
No change in coating
No change in coating
No change in coating
No change in coating
No change in coating
Test storage method
GBT 14061989
GB 16906-1997www.bzxz.net
CB/T 14101989
GB/T 1771—1991
GBT 17331993
GBT 17331993
(Art Method)
GB/T 17341993
GT 1734--1993
GBT 1763—1979
2.0.3 Epoxy coatings are divided into two types: room temperature curing type and low temperature curing type. When the ambient temperature is -5-, room temperature curing epoxy corrosive materials should be selected; when the storage medium is refined oil, dehydrated crude oil and other media that are prone to static electricity, anti-static coatings should be selected. When the storage medium is more corrosive, epoxy glass flake coatings should be selected.
2.4 Epoxy coatings should be packed intact when leaving the factory, and the packaging should indicate the product name, model, net weight, production unit, production batch number, production date and expiration date, etc., and be accompanied by a quality certificate. When supplying, the manufacturer shall provide product instructions, which shall include the technical indicators of the coating, the proportion of each component, the service life of the coating after preparation, the method of coating application, the reference dosage, precautions during transportation and storage, etc.; and the inspection report issued by the inspection agency that has passed the metrological certification, and the inspection items and results shall comply with the provisions of Table 2.0.2-1 or Table 2.0.2-2 and Table 2.0.2-3 of this standard.
2.0.5 Users shall take samples according to the provisions of "Sampling of Coating Products" GB3186. Liquid epoxy resin coatings shall be tested for viscosity, fineness, solid content, and drying time. Epoxy glass flake coatings shall be tested for solid content and drying time. If there are doubts about other properties, they shall also be tested. Its performance indicators shall comply with the provisions of Table 2.0.2-1 or Table 2.0.2-2 and Table 2.02-3 of this standard. If unqualified, double sampling shall be carried out for re-inspection; if still unqualified, the batch of coatings shall be unqualified and shall not be used.
2.0.6 The storage period of liquid epoxy coatings should not be less than 11 years. Users should store them according to the conditions required by the manufacturer's product manual and use them within the validity period. For coatings that have exceeded their validity period, they should be resampled according to the provisions of (3186). The coating performance must meet the requirements of Table 2.0.2-1 or Table 2.0.2-2 of this standard before it can continue to be used. 4
Grade and structure of anti-corrosion layer
31 The grade and structure of liquid epoxy coatings should be selected according to the specific requirements of the corrosion environment of the tank and the anti-corrosion project of steel storage tanks in accordance with the provisions of Table 3.0, 1.
Ordinary grade
Strong grade
Primer-primer-topcoat-topcoat
Grade and structure of anti-corrosion layer
Dry film thickness (un)
Liquid Epoxy
Resin coating
Primer-primer topcoat-topcoat
Special reinforced primer-topcoat-topcoat topcoat 3.0.2
22-250
Ring glass
Flake coating
When the environment is corrosive or necessary, the number of topcoat layers can be appropriately increased. 4 Anti-corrosion layer construction
4.1 General provisions
4.1.1 The construction of the anti-corrosion layer can only be carried out when the following conditions are met: the anti-corrosion design and related technical documents are complete; 1
2 Complete the anti-corrosion construction plan and technical disclosure, and conduct extensive safety technical training Education and necessary technical training:
3 Materials, machines, testing instruments, construction facilities, etc. are complete and intact: 4
Protective facilities are safe and reliable, and construction water, electricity, etc. can meet the needs of continuous construction;
Steel storage tanks and their accessories should be installed and passed the inspection. 4.1.2
During the construction of the anti-corrosion layer, welding, gas cutting, direct knocking, etc. are strictly prohibited. 4.2 Surface pretreatment
4.21 If there is oil, grease, and scale on the inner surface of the steel storage tank: clean it according to the cleaning method specified in the Steel Surface Pretreatment Specification SY4. ||tt| |4.2.2 The inner surface of the steel tank should be sprayed for rust removal according to the method specified in SY/I0407. When spraying, the tank top should be first, then the tank wall, and then the tank bottom. The rust removal quality should reach the steel surface rust level before installation and the rust removal level specified in GB/T8923-1988 Sa22 level, and the anchor depth should be 4080um. The surface pretreatment of the accessories in the tank is the same as that of the inner wall of the tank. 4.2.3 After spraying, the surface should be blown clean with dry, clean, oil-free compressed air.
4.2.4 After spraying, the defects on the steel surface and welds must be 62 -2
Solid content (%)
At (h)
Actually dry (h)
Shear strength (MPa)
Water vapor permeability
[gr (md-kPa)
Performance index of epoxy glass flake coating
Topcoat (4-running paint)
Test method
GB/T 1725—1979 (Method A)
(Confirmed in 1989)
SY/T 0041-1997
Appendix A of this standard
Performance index of liquid epoxy coating anticorrosive layer
Table 2.0.2-3
Electrical strength (MV/m)
Surface resistivity (n)
Volume resistivity (2-m)
Salt resistance (500h)
Water resistance (100, 72h)
Sewage resistance (100, 72h)
Gasoline resistance (normal temperature, 30g)
Source oil resistance
(80c, 3)
10%HS0 (room temperature, 30d)
10%NaOH (room temperature, 3d)
10 % Na0 (Air temperature, 30d)
Non-antistatic coatingAntistatic coating
No change in coating
No change in coating
No change in coating
No change in coating
No change in removing coating
No change in coating
Test storage method
GBT 14061989
GB 16906-1997
CB/T 14101989
GB/T 1771—1991
GBT 17331993
GBT 17331993
(Art method)
GB/T 17341993
GT 1734--1993
GBT 1763—1979
2.0.3 Epoxy coatings are divided into two types: room temperature curing type and low temperature curing type. When the ambient temperature is -5-, low temperature curing epoxy corrosion resistant materials should be selected. When the storage medium is refined oil, dehydrated crude oil and other media that are prone to static electricity, anti-static coatings should be selected. When the storage medium is more corrosive, epoxy glass flake coatings should be selected.
2.4 Epoxy coatings should be packed intact when leaving the factory, and the product name, model, net weight, production volume, etc. should be marked on the packaging. The manufacturer shall provide the product manual, which shall include the coating technical indicators, the proportion of each component, the service life of the coating after preparation, the coating application method, the reference dosage, the precautions during transportation and storage, etc.; and the inspection report issued by the inspection agency that has passed the metrological certification. The inspection items and results shall comply with the provisions of Table 2.0.2-1 or Table 2.0.2-2 and Table 2.0.2-3 of this standard.
2.0.5 Users shall take samples according to the provisions of "Sampling of Coating Products" GB3186. Liquid epoxy resin coatings shall be tested for viscosity, fineness, solid content and drying time. Epoxy glass flake coatings shall be tested for solid content and drying time. If there are doubts about other properties, they shall also be tested. Its performance indicators shall comply with the provisions of Table 2.0.2-1 or Table 2.0.2-2 and Table 2.02-3 of this standard. If it fails, double sampling should be done for re-inspection; if it still fails, the batch of coating is considered unqualified and cannot be used.
2.0.6 The storage period of epoxy coating should be no less than 11 years. Users should store it according to the conditions specified in the manufacturer's product manual and use it within the validity period. For coatings that have exceeded their validity period, they shall be resampled according to the provisions of (3186). The coating performance shall meet the requirements of Table 2.0.2-1 or Table 2.0.2-2 of this standard before it can continue to be used. 4
Grade and structure of anticorrosion layer
31 The grade and structure of liquid epoxy coatings shall be selected according to the requirements of Table 3.0, 1 based on the corrosion environment of the tank and the specific requirements of the anticorrosion project of steel storage tanks.
Ordinary grade
Strong grade
Primer-primer topcoat topcoat
Grade and structure of anticorrosion layer
Dry film thickness (un)
Liquid Epoxy
Resin coating
Primer-primer topcoat-topcoat
Special reinforced primer-topcoat-topcoat topcoat 3.0.2
22-250
Ring glass
Flake coating
When the environment is corrosive or necessary, the number of topcoat layers can be appropriately increased. 4 Anti-corrosion layer construction
4.1 General provisions
4.1.1 The construction of the anti-corrosion layer can only be carried out when the following conditions are met: the anti-corrosion design and related technical documents are complete; 1
2 Complete the anti-corrosion construction plan and technical disclosure, and conduct extensive safety technical training Education and necessary technical training:
3 Materials, machines, testing instruments, construction facilities, etc. are complete and intact: 4
Protective facilities are safe and reliable, and construction water, electricity, etc. can meet the needs of continuous construction;
Steel storage tanks and their accessories should be installed and passed the inspection. 4.1.2
During the construction of the anti-corrosion layer, welding, gas cutting, direct knocking, etc. are strictly prohibited. 4.2 Surface pretreatment
4.21 If there is oil, grease, and scale on the inner surface of the steel storage tank: clean it according to the cleaning method specified in the Steel Surface Pretreatment Specification SY4. ||tt| |4.2.2 The inner surface of the steel tank should be sprayed for rust removal according to the method specified in SY/I0407. When spraying, the tank top should be first, then the tank wall, and then the tank bottom. The rust removal quality should reach the steel surface rust level before installation and the rust removal level specified in GB/T8923-1988 Sa22 level, and the anchor depth should be 4080um. The surface pretreatment of the accessories in the tank is the same as that of the inner wall of the tank. 4.2.3 After spraying, the surface should be blown clean with dry, clean, oil-free compressed air.
4.2.4 After spraying, the defects on the steel surface and welds must be 62 -2
Solid content (%)
At (h)
Actually dry (h)
Shear strength (MPa)
Water vapor permeability
[gr (md-kPa)
Performance index of epoxy glass flake coating
Topcoat (4-running paint)
Test method
GB/T 1725—1979 (Method A)
(Confirmed in 1989)
SY/T 0041-1997
Appendix A of this standard
Performance index of liquid epoxy coating anticorrosive layer
Table 2.0.2-3
Electrical strength (MV/m)
Surface resistivity (n)
Volume resistivity (2-m)
Salt resistance (500h)
Water resistance (100, 72h)
Sewage resistance (100, 72h)
Gasoline resistance (normal temperature, 30g)
Source oil resistance
(80c, 3)
10%HS0 (room temperature, 30d)
10%NaOH (room temperature, 3d)
10 % Na0 (Air temperature, 30d)
Non-antistatic coatingAntistatic coating
No change in coating
No change in coating
No change in coating
No change in coating
No change in removing coating
No change in coating
Test storage method
GBT 14061989
GB 16906-1997
CB/T 14101989
GB/T 1771—1991
GBT 17331993
GBT 17331993
(Art method)
GB/T 17341993
GT 1734--1993
GBT 1763—1979
2.0.3 Epoxy coatings are divided into two types: room temperature curing type and low temperature curing type. When the ambient temperature is -5-, low temperature curing epoxy corrosion resistant materials should be selected. When the storage medium is refined oil, dehydrated crude oil and other media that are prone to static electricity, anti-static coatings should be selected. When the storage medium is more corrosive, epoxy glass flake coatings should be selected.
2.4 Epoxy coatings should be packed intact when leaving the factory, and the product name, model, net weight, production volume, etc. should be marked on the packaging. The manufacturer shall provide the product manual, which shall include the coating technical indicators, the proportion of each component, the service life of the coating after preparation, the coating application method, the reference dosage, the precautions during transportation and storage, etc.; and the inspection report issued by the inspection agency that has passed the metrological certification. The inspection items and results shall comply with the provisions of Table 2.0.2-1 or Table 2.0.2-2 and Table 2.0.2-3 of this standard.
2.0.5 Users shall take samples according to the provisions of "Sampling of Coating Products" GB3186. Liquid epoxy resin coatings shall be tested for viscosity, fineness, solid content and drying time. Epoxy glass flake coatings shall be tested for solid content and drying time. If there are doubts about other properties, they shall also be tested. Its performance indicators shall comply with the provisions of Table 2.0.2-1 or Table 2.0.2-2 and Table 2.02-3 of this standard. If it fails, double sampling should be done for re-inspection; if it still fails, the batch of coating is considered unqualified and cannot be used.
2.0.6 The storage period of epoxy coating should be no less than 11 years. Users should store it according to the conditions specified in the manufacturer's product manual and use it within the validity period. For coatings that have exceeded their validity period, they shall be resampled according to the provisions of (3186). The coating performance shall meet the requirements of Table 2.0.2-1 or Table 2.0.2-2 of this standard before it can continue to be used. 4
Grade and structure of anticorrosion layer
31 The grade and structure of liquid epoxy coatings shall be selected according to the requirements of Table 3.0, 1 based on the corrosion environment of the tank and the specific requirements of the anticorrosion project of steel storage tanks.
Ordinary grade
Strong grade
Primer-primer topcoat topcoat
Grade and structure of anticorrosion layer
Dry film thickness (un)
Liquid Epoxy
Resin coating
Primer-primer topcoat-topcoat
Special reinforced primer-topcoat-topcoat topcoat 3.0.2
22-250
Ring glass
Flake coating
When the environment is corrosive or necessary, the number of topcoat layers can be appropriately increased. 4 Anti-corrosion layer construction
4.1 General provisions
4.1.1 The construction of the anti-corrosion layer can only be carried out when the following conditions are met: the anti-corrosion design and related technical documents are complete; 1
2 Complete the anti-corrosion construction plan and technical disclosure, and conduct extensive safety technical training Education and necessary technical training:
3 Materials, machines, testing instruments, construction facilities, etc. are complete and intact: 4
Protective facilities are safe and reliable, and construction water, electricity, etc. can meet the needs of continuous construction;
Steel storage tanks and their accessories should be installed and passed the inspection. 4.1.2
During the construction of the anti-corrosion layer, welding, gas cutting, direct knocking, etc. are strictly prohibited. 4.2 Surface pretreatment
4.21 If there is oil, grease, and scale on the inner surface of the steel storage tank: clean it according to the cleaning method specified in the Steel Surface Pretreatment Specification SY4. ||tt| |4.2.2 The inner surface of the steel tank should be sprayed for rust removal according to the method specified in SY/I0407. When spraying, the tank top should be first, then the tank wall, and then the tank bottom. The rust removal quality should reach the steel surface rust level before installation and the rust removal level specified in GB/T8923-1988 Sa22 level, and the anchor depth should be 4080um. The surface pretreatment of the accessories in the tank is the same as that of the inner wall of the tank. 4.2.3 After spraying, the surface should be blown clean with dry, clean, oil-free compressed air.
4.2.4 After spraying, the defects on the steel surface and welds must be 65 Users should take samples according to the provisions of "Sampling of Coating Products" GB3186. Liquid epoxy resin coatings should be tested for viscosity, fineness, solid content, and drying time. Epoxy glass flake coatings should be tested for solid content and drying time. If there are doubts about other properties, they should also be tested. Its performance indicators should comply with the provisions of Table 2.0.2-1 or Table 2.0.2-2 and Table 2.02-3 of this standard. If it is unqualified, double sampling should be carried out for re-inspection: If it is still unqualified, the batch of coatings is unqualified and cannot be used.
2.0.6 The storage period of bulk epoxy coatings should be no less than 11 years. Users should store them according to the conditions required by the manufacturer's product manual and use them within the validity period. For coatings that have exceeded their validity period, they shall be resampled according to the provisions of (3186). The coating performance shall meet the requirements of Table 2.0.2-1 or Table 2.0.2-2 of this standard before it can continue to be used. 4
Grade and structure of anticorrosion layer
31 The grade and structure of liquid epoxy coatings shall be selected according to the requirements of Table 3.0, 1 based on the corrosion environment of the tank and the specific requirements of the anticorrosion project of steel storage tanks.
Ordinary grade
Strong grade
Primer-primer topcoat topcoat
Grade and structure of anticorrosion layer
Dry film thickness (un)
Liquid Epoxy
Resin coating
Primer-primer topcoat-topcoat
Special reinforced primer-topcoat-topcoat topcoat 3.0.2
22-250
Ring glass
Flake coating
When the environment is corrosive or necessary, the number of topcoat layers can be appropriately increased. 4 Anti-corrosion layer construction
4.1 General provisions
4.1.1 The construction of the anti-corrosion layer can only be carried out when the following conditions are met: the anti-corrosion design and related technical documents are complete; 1
2 Complete the anti-corrosion construction plan and technical disclosure, and conduct extensive safety technical training Education and necessary technical training:
3 Materials, machines, testing instruments, construction facilities, etc. are complete and intact: 4
Protective facilities are safe and reliable, and construction water, electricity, etc. can meet the needs of continuous construction;
Steel storage tanks and their accessories should be installed and passed the inspection. 4.1.2
During the construction of the anti-corrosion layer, welding, gas cutting, direct knocking, etc. are strictly prohibited. 4.2 Surface pretreatment
4.21 If there is oil, grease, and scale on the inner surface of the steel storage tank: clean it according to the cleaning method specified in the Steel Surface Pretreatment Specification SY4. ||tt| |4.2.2 The inner surface of the steel tank should be sprayed for rust removal according to the method specified in SY/I0407. When spraying, the tank top should be first, then the tank wall, and then the tank bottom. The rust removal quality should reach the steel surface rust level before installation and the rust removal level specified in GB/T8923-1988 Sa22 level, and the anchor depth should be 4080um. The surface pretreatment of the accessories in the tank is the same as that of the inner wall of the tank. 4.2.3 After spraying, the surface should be blown clean with dry, clean, oil-free compressed air.
4.2.4 After spraying, the defects on the steel surface and welds must be 65 Users should take samples according to the provisions of "Sampling of Coating Products" GB3186. Liquid epoxy resin coatings should be tested for viscosity, fineness, solid content, and drying time. Epoxy glass flake coatings should be tested for solid content and drying time. If there are doubts about other properties, they should also be tested. Its performance indicators should comply with the provisions of Table 2.0.2-1 or Table 2.0.2-2 and Table 2.02-3 of this standard. If it is unqualified, double sampling should be carried out for re-inspection: If it is still unqualified, the batch of coatings is unqualified and cannot be used.
2.0.6 The storage period of bulk epoxy coatings should be no less than 11 years. Users should store them according to the conditions required by the manufacturer's product manual and use them within the validity period. For coatings that have exceeded their validity period, they shall be resampled according to the provisions of (3186). The coating performance shall meet the requirements of Table 2.0.2-1 or Table 2.0.2-2 of this standard before it can continue to be used. 4
Grade and structure of anticorrosion layer
31 The grade and structure of liquid epoxy coatings shall be selected according to the requirements of Table 3.0, 1 based on the corrosion environment of the tank and the specific requirements of the anticorrosion project of steel storage tanks.
Ordinary grade
Strong grade
Primer-primer topcoat topcoat
Grade and structure of anticorrosion layer
Dry film thickness (un)
Liquid Epoxy
Resin coating
Primer-primer topcoat-topcoat
Special reinforced primer-topcoat-topcoat topcoat 3.0.2
22-250
Ring glass
Flake coating
When the environment is corrosive or necessary, the number of topcoat layers can be appropriately increased. 4 Anti-corrosion layer construction
4.1 General provisions
4.1.1 The construction of the anti-corrosion layer can only be carried out when the following conditions are met: the anti-corrosion design and related technical documents are complete; 1
2 Complete the anti-corrosion construction plan and technical disclosure, and conduct extensive safety technical training Education and necessary technical training:
3 Materials, machines, testing instruments, construction facilities, etc. are complete and intact: 4
Protective facilities are safe and reliable, and construction water, electricity, etc. can meet the needs of continuous construction;
Steel storage tanks and their accessories should be installed and passed the inspection. 4.1.2
During the construction of the anti-corrosion layer, welding, gas cutting, direct knocking, etc. are strictly prohibited. 4.2 Surface pretreatment
4.21 If there is oil, grease, and scale on the inner surface of the steel storage tank: clean it according to the cleaning method specified in the Steel Surface Pretreatment Specification SY4. ||tt| |4.2.2 The inner surface of the steel tank should be sprayed for rust removal according to the method specified in SY/I0407. When spraying, the tank top should be first, then the tank wall, and then the tank bottom. The rust removal quality should reach the steel surface rust level before installation and the rust removal level specified in GB/T8923-1988 Sa22 level, and the anchor depth should be 4080um. The surface pretreatment of the accessories in the tank is the same as that of the inner wall of the tank. 4.2.3 After spraying, the surface should be blown clean with dry, clean, oil-free compressed air.
4.2.4 After spraying, the defects on the steel surface and welds must be 6
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