HG/T 20581-2011Specification for materials selection of steel chemical vessels (English PDF)
钢制化工容器材料选用规定
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
May 18, 2011
Implementation date
June 1, 2011
Scope
HG/T 20581-2011 is the English-translated version of 钢制化工容器材料选用规定.
HG/T 20581-2011 is the Chinese standard "Specification for materials selection of steel chemical vessels". Its scope clause reads: This standard specifies the selection, specifications, applicable limit and scope, as well as the application and substitution requirements of new materials and steels produced according to foreign standards.
This standard is applicable to the welding consumables selection for carbon steel, high strength low alloy steel, pearlite heat resistant steel, stainless steel and stainless clad steel plate chemical vessels whose design pressure is not greater than 35.0MPa and design temperature greater than -20 °C. The materials include rolled metal, forgings, castings and welding consumables.
The selection, specifications and application scope of welding consumables for vessels pressure parts and their accessories shall meet the requirements of this standard.
The higher or special requirements for the materials in the design, if any, shall be indicated in the drawings or corresponding documents. Its clauses include terms and definitions.
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Document preview — HG/T 20581-2011
National Standard of the People's Republic of China
- Replacing
- HG 20581-1998
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- 1 Scope
- 2 Normative References
- 3 Terms and Definitions
- 4 General
- 5 Principles for Selection of Steels
- 6 Specifications of Steels
- 7 Applicable Limit and Scope of Steels
- 8 Welding Consumables
- 9 Apprasial and Application of New Materials
- 10 Application of Steels with Foreign Specification Number
- 11 Substitution of Steels
- Annex A (Informative Annex) Mechanical Properties of Commodity Grade Bolts
- Annex B (Informative Annex) Composition and Properties of Some Special Welding Consumables
- Annex C (Informative Annex) Nickel and Nickel Alloy Welding Consumables
1 Scope
1.0.1
This standard specifies the selection, specifications, applicable limit and scope, as well as the application and substitution requirements of new materials and steels produced according to foreign standards.
1.0.2
This standard is applicable to the welding consumables selection for carbon steel, high strength low alloy steel, pearlite heat resistant steel, stainless steel and stainless clad steel plate chemical vessels whose design pressure is not greater than 35.0MPa and design temperature greater than -20 °C. The materials include rolled metal, forgings, castings and welding consumables.
1.0.3
The selection, specifications and application scope of welding consumables for vessels pressure parts and their accessories shall meet the requirements of this standard. The higher or special requirements for the materials in the design, if any, shall be indicated in the drawings or corresponding documents.
2 Normative References
The following documents are indispensable for the application of this standard. For dated references, only the dated edition is applicable to this document. For undated references, the latest editions of the normative documents (including all the amendments) are applicable to this document.
Hexagon Nuts-Product Grade C GB/T 41
Steel Pressure Vessels GB 150
Quality Carbon Structural Steels GB/T 699
Carbon Structural Steels GB/T 700
Steel Plates for Boiler and Pressure Vessels GB 713
Stainless Steel Covered Electrodes GB/T 983
Stainless Steel Bars GB/T 1220
Heat-Resistant Steel Bars GB/T 1221
Stainless Acid-Resistant Steel Castings-Specifications GB/T 2100
Test method for acid resistance of vitrified clay pipe GB 2835
Alloy Structure Steels GB 3077
Seamless Steel Tubes for Low and Medium Pressure GB 3087
Welded Steel Pipes for Low Pressure Liquid Delivery GB 3092
Mechanical Properties of Fasteners GB/T 3098
Wire Rod for Electrode GB/T 3429
Stainless Steel Rods and Wires for Inert-Gas Shield Welding GB 4233
Stainless Steel Wires for Welding GB 4242
Method of 10 Percent Oxalic Acid Etch Test for Stainless Steels GB/T 4334.1
Method of Ferric Sulfate-Sulfuric Acid Test for Stainless Steels GB/T 4334.2
Method of 65 Percent Nitric Acid Test for Stainless Steels GB/T 4334.3
Method of Nitric-Hydrofluoric Acid Test for Stainless Steels GB/T 4334.4
Method of Copper Sulfate-Sulfuric Acid Test for Stainless Steels GB/T 4334.5
Carbon Steel Covered Electrodes GB/T 5117
Low Alloy Steel Covered Electrodes GB/T 5118
Carbon Steel Electrodes and Fluxes for Submerged Arc Welding GB/T 5293
Seamless Steel Tubes and Pipes for High Pressure Boiler GB 5310
Radiographic Testing For Steel Castings GB/T 5677
Seamless Steel Pipe and Tubing Methods for Ultrasonic Testing GB/T 5777
Hexagon Head Bolts-Product Grade C GB/T 5780
Hexagon Head Bolts-Full Thread-Product Grade C GB/T 5781
Hexagon Head Bolts GB/T 5782
Hexagon Head Bolts-Full Thread GB/T 5783
Hexagon Head Bolts; Reduced Shank; Product Grades B GB/T 5784
Hexagon Nuts, Style 1 GB/T 6170
Hexagon Nuts, Style 2 GB/T 6175
Seamless Steel Tubes for High-Pressure for Chemical Fertilizer Equipments GB 6479
Carbon Steel Castings Suitable for Welded Structure GB/T 7659
Steel Tubes-The Inspection Method on Eddy Current Test GB/T 7735
Welding Electrodes and Rods for Gas Shielding Arc Welding of Carbon and Low Alloy Steel GB/T 8110
Seamless Steel Tubes for Liquid Service GB/T 8163
Heat Resistant Steel Castings GB/T 8492
Penetrant Testing for Steel Castings GB/T 9443
Magnetic Particle Testing for Steel Castings GB/T 9444
Seamless Steel Tubes for Petroleum Cracking GB 9948
Carbon Steel Castings for General Engineering Purpose GB/T 11352
Welded Stainless Steel Pipes for Liquid Delivery GB/T 12771
Low Alloy Steel Electrodes and Fluxes for Submerged Arc Welding GB/T 12470
Steel Wires for Melt Welding GB/T 14957
Stainless Steel Seamless Tubes for Fluid Transport GB/T 14976
Nickel and Nickel Alloy Wires and Rods GB/T 15620
Stainless Steel Electrodes and Fluxes for Submerged Arc Welding GB/T 17854
Stainless and Heat-resisting Steels-Designation and Chemical Composition GB/T 20878
Detecting Susceptibility to Intergranular Corrosion in Stainless Steel Pressure Vessels GB/T 21433
Stainless Steel Plate, Sheet and Strip for Pressure Equipments GB 24511
Specification for Carbon Steel Castings for Pressure Vessels HG/T 2741
Welded Austenitic Stainless Steel Tubes HG 20537
Specification of Design Base for Steel Chemical Vessels HG/T 20580
Copper and Copper Alloy Wires and Rods JB 2736-1980
General Specifications for Open Die Forgings on Hammer JB/T 4385.1
Carbon and Low - Alloy Steel Forgings for Pressure Vessels JB 4726
Stainless Steel Forgings for Pressure Vessels JB 4728
Nondestructive Testing of Pressure Equipments JB/T 4730
Technical Permission of Steel Welding Rod Purchasing for Pressure Vessels JB/T 4747
Welding Procedure Qualification for Steel Pressure Vessels JB 4708
Material Selection Guideline for Design of Major Equipment in Key Units Processing Sour Crude Oil SH/T 3096
Stainless Steel Rods and Wires for Inert-Gas Shield Welding YB/T 5091
Stainless Steel Wires for Welding YB/T 5092
Supervision Regulation on Safety Technology for Stationary Pressure Vessel TSG R0004-2009
3 Terms and Definitions
For the purposes of this standard, the terms and definitions established in "Steel Pressure Vessels" GB 150 and "Specification of Design Base for Steel Chemical Vessels" HG/T 20580 and the following ones apply.
3.0.1 Carbon steel
It refers to the iron carbon alloy, without other intentionally-added alloy elements (elements such as Si and Al may be added for the purpose of deoxygenation), whose manganese content is less than or equal to 1.20 % and carbon content is less than or equal to 2.0 % . Low carbon steel generally refers to the carbon steel whose carbon content is less than or equal to 0.25 %.
3.0.2 Low alloy steel
It refers to the alloy steel formed by adding a small amount of alloy element in the carbon steel mainly for the purpose of increasing the steel intensity and improving the combination properties, including low-alloy structural steel, high strength low alloy steel and pearlite heat resistant steel. Low-carbon and weldable low-alloy structural steels are frequently used in chemical vessels.
3.0.3 Pearlite heat resistant steel
It refers to the low-carbon pearlite heat resistant steel added with such alloy elements as chrome (<=10%) and molybdenum mainly for the purpose of improving the heat-resistant and hydrogen-resistant property of steels.
3.0.4 Stainless steel
It refers to the alloy steel stainless in the atmosphere whose nominal chrome content is greater than or equal to 13%. It may be classified into the ferritic stainless steel, austenitic stainless steel, duplex stainless steel, martensitic stainless steel and so on according to the metallographic structure of steel at ordinary temperature.
3.0.5 Austenitic stainless steel
It refers to the stainless steel whose metallographic structure is mainly austenite at ordinary temperature.
3.0.6 Ferritic stainless steel
It refers to the stainless steel whose metallographic structure is mainly ferrite at ordinary temperature.
3.0.7 Duplex stainless steel
It refers to the stainless steel with about half ferritic phase and austenitic phase in the solid quenching (metallographic) structure at ordinary temperature.
3.0.8 Ferritic steel
It is the generic term of carbon steel, high strength low alloy steel, pearlite heat resistant steel and ferritic stainless steel.
3.0.9 Pressure parts
They refer to the spare parts directly bear the pressure of substances, such as cylinder, head, spherical shell, nozzle, flange and tube plate.
3.0.10 Non-pressure parts
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 33 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of HG/T 20581
| Edition | Title | Revision | Status |
|---|---|---|---|
| HG/T 20581-2011 | Specification for materials selection of steel chemical vessels | current edition | Current |
| HG 20581-1998 | Specification for materials selection of steel chemical vessels | previous edition | Superseded |
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