SH 3022-1999 Technical Specification for Anti-corrosion Coatings for Industrial Equipment and Pipelines
Some standard content:
SH3022-1999 Technical specification for the coating anticorrosion of equipment and piping in petrochemical industry Issued on 2000-09-22 State Administration of Petroleum and Chemical Industry Implementation on 2000-01-01 Industry Standard of the People's Republic of China Technical specification for the coating anticorrosion of equipment and piping in petrochemical industry SH 3022-1999
Editing unit: Lanzhou Design Institute of Sinopec Group Sinopec Third Construction Company
Editor-in-chief: Sinopec Group Approving department: State Bureau of Petroleum and Chemical Industry State Bureau of Petroleum and Chemical Industry Document
SINOPEC Data (1999) No. 40Q
Notice on Approving the Promotion of Petrochemical Industry Standards such as "Design Specifications for Petrochemical Control Rooms and Automatic Analyzer Rooms" Sinopec Group:
The draft petrochemical industry standards such as "Design Specifications for Petrochemical Control Rooms and Automatic Analyzer Rooms" have been approved by our bureau and are now published. Standard name and number: Mandatory Standard
Five Petrochemical Control Room and Automatic Analysis Room Design Specification (Replace SHJ6-BE) 1. SI[3006-1999
2. SH3005-1P99
Petrochemical Main Instrument Selection (Replace H5-1) Petrochemical Equipment and Pipeline Paint Anti-brand Greed Technical Specification (Replace SH122-903.SH3022-1999
4. $11 3524-1999
6, SH3148-1999
Strongly recommended standard
Petrochemical 1 Steel tower, container on-site welding construction type standard (replace 8H3524-92) Petrochemical steel equipment expansion design specification (replace SH304R-93) 1, S11/F3092-1999 Non-resonant chemical decentralized control multiplication and statistical specification 2, SH/T3096-1999 High oil rate point installation of main equipment The above standard for design and material selection has been implemented since January 1, 2000. The National Bureau of Petroleum and Chemical Industry issued the standard on September 22, 1999. It was revised by Sinopec Group Design Institute and Sinopec Third Construction Company on the anti-corrosion design and flow specification 5HJ22-9 for equipment and pipeline coatings of petrochemical enterprises according to the notice of the Municipal Petrochemical (1995) Construction Standard No. 269. The standard is divided into five parts and six appendices. The main contents of this revision are: 1. In order to extend the service life of the anti-corrosion coating: improve the rust removal level of the steel surface: 2. Classify the corrosion degree by combining qualitative and quantitative methods: 3. Increase the control of the total thickness of the coating; 4. Add the types of commonly used anti-corrosion coatings and their matching solutions. Strengthen the detection and control of the quality of coating products, and complete the control of the installation construction process; 6. There are strict and clear regulations for the inspection and acceptance of the quality of coating projects (such as coating depth, number of roll-on passes, etc.) During the revision process, we conducted extensive research on the existing problems in the original specification, summarized the practical experience of anti-corrosion design and construction of pool equipment and pipeline coatings in recent years, solicited opinions from relevant design, construction, production and other parties, discussed the main issues, and finally reviewed and approved them. During the implementation of this specification, if any changes or supplements are found, the opinions and relevant data will be provided to the editor for reference in future revisions.
Unit address: No. 1, Fuli West Road, Xigu District, Lanzhou City, Gansu Province, No. 60 Xintang, Zhenhai, Ningbo City, Zhejiang Province
Compiler of this specification: Lanzhou Design Institute of Sinopec Group, Sinopec Group No. 3 Construction Company
Main drafters: Xu Yibin, Bai Caiqin, Zhang Yunpu, Trump, Postal Code 36
Service Code 31G207
2 Name Reader, Technical
3 Design - +
8.1-General provisions
3.2 Surface treatment ||tt ||3.3 Aboveground equipment and corrosion protection
3.4 Underground equipment and corrosion protection -
4.1 Regulations
4.2 Surface treatment and inspection before installation
1.3 Underground equipment and corrosion protection during construction
4.4 Buried power equipment and electrical equipment during construction
4.5 Handover and comprehensive protection
5.1 Inspection and correction
5.2 Underground equipment and corrosion protection during construction Inspection and acceptance - 3.3 Inspection and acceptance of equipment and pipelines Appendix A Classification of corrosive substances in the atmosphere B Calculation of the amount of paint used for equipment and pipelines D Technical indicators of commonly used paints for equipment and pipelines Appendix E Technical indicators of ethylene phosphating primers Causes of corrosion during coating operations and their prevention measures SH 3022-1999 1.0.1 This specification is used for the external surface coatings for anti-corrosion projects of petrochemical steel equipment, pipelines and their affiliated steel structures. This specification is not applicable to the external surface coatings for equipment and pipelines with a surface temperature exceeding 00 °C. This specification does not include the surface coatings for equipment and pipelines and the coatings for long-distance pipelines. 1.0.2 When implementing this specification, the provisions of the current mandatory standards and specifications shall also be met. 2.0.1 Coating
SH3022-1999
2 Nouns and terms
Coating is a general term for a class of liquids or materials that can form a permanent coating film with protective, decorative or special properties (such as corrosion resistance, anti-rust, etc.) on the surface of an object. In the names of various types of coatings, "lacquer" can be used to represent "coating", such as anti-rust paint, acid-coated paint, etc. 2.0.2 Paint film or paint film
The continuous film formed by coating the surface of an object evenly, which can be composed of one or more layers. 2.0.3 Vernish
A type of material that does not contain coloring matter, often used as a surface coating: it can form a transparent film with protective, anti-corrosion and special properties. 2.D.4 Enamel
After washing, the film formed is hard, flat and smooth, and the appearance is usually similar to that of porcelain. 2.0.5 Primer
In multi-layer coating, the paint directly applied to the steel surface, 2.0.6 Surfacer
In multi-layer coating, it is used to correct the uneven surface of the primer. 2.3. Intermedialecoat A coating between the primer and the surface, its main function is to increase the thickness of the coating, and it can adhere well to the primer and the topcoat.
2.dB Topcoal
When multiple layers are applied, the top layer of paint is applied, usually 1-2 coats. 2.d.9 Adherence
Including welding slag, welding acid, alkali salt, rust, dirt, emulsified skin, iron and old paint coating. 2.0.10 Hiding power
When a layer of paint is evenly applied on the surface of an object, the surface of the object is completely covered and no longer shows the original state: at this time, the number of grams of paint per square meter is called hiding power. Unit, m. 2.0.11 Adherence
Adhesion refers to the degree of firmness of the surface of the coating and the surface of the coated object combined together through the action of physical and chemical forces. Generally, "" is used to indicate that
2.0.t2 is a slightly hygroscopic medium, a medium with a solubility in water of less than 2% at a temperature of 20°C. 2.0.13 is an alkali-based medium with a solubility in water of equal to or greater than 2% at a temperature of 20°C. 2.0.14 is a slightly hygroscopic medium with a humidity of % or less at a temperature of 2°C. 2.0.15 Hygroscopic medium Lyeoscopic medium Magnetic and salt medium with relative equilibrium humidity less than 60% at 2°C. 2
3.1.1 The selection of coatings shall comply with the following principles: 1 Adapt to the use environment of the coated object; 2 Consider the material of the surface of the coated object; 3 Correct matching of each layer of coating; 4 Safe and reliable, reasonable; 5 Conform to the construction conditions.
S3022-1999
3.1 General provisions
3.1,2 Carbon steel, low alloy steel equipment, pipelines and their steel structure surfaces should be coated. 3.1.3 The base material coated on the surface of the steel should be the base material of the cable measured by the current national standard "desorption aging method" GB/T1720.
3.1.4 Unless otherwise specified in the design, the following situations Conditions that should not be painted: Surface of stainless steel:
Galvanized surface:
3 Specially processed surface:
Surface with paint or discoloration
Nameplate, signboard or label
Equipment, pipelines and attached steel structures manufactured at the manufacturer should be primed according to design requirements. 3.1.5
3.1.6 The following conditions should be painted at the construction site. Equipment, pipelines and attached steel structures assembled at the construction site have been primed at the manufacturer and need to be painted at the construction site and topcoated: 2
3 Equipment, pipelines and attached steel structures have been topcoated at the manufacturer and need to be repainted at the construction site. Equipment and pipelines should be anti-corrosion coated with paint 3.1.7
3.1. The corrosion of the material surface by corrosive substances in the atmosphere can be treated according to their corrosion resistance. The degree of corrosion is divided into three categories: strong corrosion, medium corrosion and exhaustive corrosion, as shown in Table 3.1.8.
Table 3.1.8 Corrosion degree of corrosive substances in the atmosphere on the surface of steel Corrosive substances and their effect factors
Action
Air cabinet humidity (%)
Strong corrosion
Medium corrosion
Corrosiveness
Body corrosion
Drop liquid action
SE 3022-1999
Continued Table 3.1.8
Corrosive substances and their action conditions
Inorganic substances
Organic acids
Insoluble
Products are insoluble, difficult to absorb
Easily soluble, easily hygroscopic
Dissolved, difficult to condense
Easily soluble, easily hygroscopic
Insoluble
Products are decomposed, hygroscopic
Industrial water
Salt solution
Inorganic acid
Organic acid
General organic liquid
Note: @Highly volatile gases are accompanied by Table 1.0.1:② See Table 0 for the specific details of the limiting substances. 2;
Push the disk
In the record, "\" indicates the degree of disease under the case, relative humidity of air (%)
Strong corrosion
Equipment and alternative anti-corrosion, but the performance, use and matching of commonly used coatings are shown in Appendix B. 3.1.9
3.1.1D Estimation of coating usage is shown in Record C.
3.2 Surface treatment
Medium spots
Weak spots
3.2.1 The surface rust grade and rust removal grade of steel should be determined by comparing with the typical sample photos in the national standard GB8923 for the surface rust grade and rust removal grade of steel.
3.2.2 The rust level of steel surface is divided into the following four levels: 1A-
The steel surface with completely free of oxide scale and almost no rust; 2A-
The steel surface with rust and part of the oxide scale peeling off; 3B-
The steel surface with a small amount of pitting; 4C-
The steel surface with no oxide scale peeling off or scraping off due to rust and no pitting. 3.2.3 The rust removal level of steel surface is divided into the following four levels; 5A-
The steel surface with completely free of oxide scale and almost no rust; 6A-
The steel surface with no visible grease and dirt, and no loosely attached rust, embedded rust and paint coating. 2Sr3——Excessive manual and power tool rust removal The steel surface has no visible grease and dirt, and there are attached objects such as scale, cast iron and oil coating. The rust removal should be more thorough than St. The surface of the visible part of the substrate should have a metallic luster. 3S—Thorough spray or spray rust removal
The steel surface has no visible grease and dirt, scale, cast iron and oil sludge layers, etc. The residue is not removable.
4Sa2.5—
Very thorough spray or spray rust removal
The steel surface has no visible grease, dirt, scale, rust and oil ball sludge, etc. Any residual traces should be only slight spots or strips. 3.3 Anti-corrosion of above-ground equipment and pipelines 3.3.1 Anti-corrosion materials for above-ground equipment and pipelines can be selected according to 3.3.1. 3.3.1 Types of contaminants Material properties and requirements Anti-corrosion agents Chemical atmosphere resistance Non-reactive acid Acidic gases Containing organic acids and impurities Weak industry Removal of gasoline, kerosene, light sealants Grease, esters Chemical solvents
Moisture resistance
:0:~-200
Anti-corrosion materials performance and use speed
Environmental requirements, resin materials
Organic base
Deep color performance and use
Weather resistance
Coating types
351-500
SHS022-1999
Continued Table 8. 3. 1
Note: The V in the table indicates good performance, protection selection: indicates that due to price drop, construction and other reasons, it is not suitable to use, material
Epoxy resin coatingbzxZ.net
\bearing performance is one, can be omitted;
3.3.2 Except for the following circumstances, the equipment and roads with heat insulation can be 1~2 anti-adhesion or alkyd anti-rust continued. Silicone is suitable for heat-insulated equipment and pipelines in hot and humid areas, and should be coated with temperature-resistant primer according to the use rules; 1. Cold-insulated equipment and pipelines can choose cold primer, or high-temperature primer, preferably 1-2 coats per day. 3.3.3 The total coating sequence of the above equipment and pipelines should comply with the provisions in Table 3.3.3. Table 3. 3.3
Corrosion
Total dry film thickness of the aboveground equipment and temporary pipeline prevention and control layer (um total thickness of the hospital
Medium source replacement
Note: The economic thickness of the high-resistance coating family is 40μ, indoor
Not used:
Increase the coating effect by 1~2 times
3.3.4 The service life of the aboveground equipment and pipeline prevention and control layer should be consistent with the maintenance cycle of the device 3.3.5 Requirements for the rust removal level of the steel surface by the primer, which shall meet the requirements of Table 3.3.5. For the steel surface with rust level D, spraying or derusting shall be adopted.
3.3.5 Requirements for the rust removal level of the wood surface by the primer Rat's wedding paint
Ethyl acetate amine
Oxygen blue welcome
No oxygen resin primer
Ammonia primer
Test type anti-pyrogenic
Nitrogen embedded sangyiyanqiliang
Suitable dyeing glue primer
No skin density thin
Medium skin
Weak corrosion
SH9022-1999
3.4 Abrasion of buried equipment and pipelines 3.4.t The rust removal level of the surface treatment of underground equipment and pipes should be St3. 3.4.2 The corrosion of buried equipment and pipes should be determined according to the soil corrosion level according to Table 3.4.2. Table 3.4.2 Soil fill corrosion level and anti-corrosion level Soil corrosion level Resistivity 50--100 3. 100
Total salt content
(% by mass)
0.75 - 0.05
Water content
[% by mass]
Note: If any item exceeds the listed index, the relative humidity shall be increased by one degree
0.3 - D. D25
plI value
3.5--4.5
Anti-corrosion grade
Special grade
Reinforced grade
Ordinary plastic
3.4.3 When buried pipes cross railways, roads, sea territories, and change the depth of buried pipes, the anti-corrosion grade should be extra-reinforced grade. 3.4.4 The corrosion coating can be selected from the polyester backing or epoxy coal asphalt backing anti-corrosion treatment, and the anti-sticking pure coating structure should comply with the provisions of Table 3.4.4-1 and Table 3.4.4-2.
Shallow 3.4.4-1 Petroleum near sound anti-abrasion coating structure (mm) crevice corrosion grade
Specially reinforced grade
Book two levels
Fat corrosion coating structure
Bone expansion Model: glass cloth·asphalt·glass·asphalt·glass cloth·green glass cloth·polyoxygenated glass cloth·industrial film·glass cloth·Portuguese glass cloth·short glass·asphalt industry
asphalt paint·primary green·glass·back·green·chlorinated ethylene·industrial Xinjiang change 3.4.4-2 ring more source square anti-corrosion coating structure (mm) anti-corrosion good
special blood strong short
reinforced grade
world common grade
Structure of anti-corrosion coating
Each layer
Base paint—glass cloth on one side—toothed cloth on one side—carbon fiber cloth on both sides Primer—glass cloth on the other side—gloss glass cloth on both sides Primer—glass cloth on both sides Strong base surface—glass cloth on both sides Top coat
Total thickness of polyester layer
Total thickness of lower layer
3.4.5 The requirements for asphalt backing performance of stone anti-corrosion coating shall comply with the requirements of Table 3.4.5-1. The performance of petroleum asphalt should meet the requirements of Table 3.4.5-2. The softening point of asphalt of anti-corrosion coating should be higher than the normal operating temperature of the equipment or pipe. The penetration of asphalt should be less than 20 (1/10mm). Requirements for asphalt performance of petroleum asphalt anti-corrosion coating Table 3.4. 5-1 25~-50 Softening point (ring and ball method) Penetration (1/10mm) 15--30 No. 30 blue can be used or No. 30 and 109 blue can be mixed. No. 10 steel or No. 10 spinning blue can be mixed with 2-inch and 3-inch special blue.
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