GB/T 12770: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 12770-2025 | English | RFQ |
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3 days [Need to translate]
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Welded stainless steel tubes for mechanical structures
| Valid |
GB/T 12770-2025
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| GB/T 12770-2012 | English | 329 |
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3 days [Need to translate]
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Welded stainless steel tubes for mechanical structures
| Valid |
GB/T 12770-2012
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| GB/T 12770-2002 | English | 519 |
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4 days [Need to translate]
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Mechanical structure stainless steel welded pipe
| Obsolete |
GB/T 12770-2002
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| GB/T 12770-1991 | English | 439 |
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4 days [Need to translate]
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Welded stainless steel tubes for machine structure
| Obsolete |
GB/T 12770-1991
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Basic data | Standard ID | GB/T 12770-2025 (GB/T12770-2025) | | Description (Translated English) | Welded stainless steel tubes for mechanical structures | | Sector / Industry | National Standard (Recommended) | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 12770-2012 | GB/T 12770-2012: Welded stainless steel tubes for mechanical structures---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Welded stainless steel tubes for mechanical structures
ICS 77.140.75
H48
National Standards of People's Republic of China
Replacing GB/T 12770-2002
Mechanical structure with stainless steel welded pipe
Issued on. 2012-11-05
2013-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
The standard reference ASTMA554/A554M-2008 "mechanical structure with stainless steel welded pipe" amendment.
This standard replaces GB/T 12770-2002 "mechanical structure with stainless steel welded pipe." This standard and GB/T 12770-2002 phase
Ratio, the main technical changes are as follows.
--- Modify the normative references;
--- Amend the grade and chemical composition of steel, an increase of 022Cr23Ni5Mo3N, 022Cr25Ni7Mo4N duplex grades;
--- Welded steel pipe sizes direct reference to common standards;
--- Modify the dimensional accuracy of the steel pipe, bending;
--- Increased steel pipe roundness provisions;
--- Increased diameter greater than 219mm pipe welds transverse bending test;
--- Increasing the weld reinforcement is provisions.
The standard proposed by China Iron and Steel Association.
This standard by the National Steel Standardization Technical Committee (SAC/TC183) centralized.
This standard was drafted. Shanxi Taigang Stainless Steel Co., Ltd., Zhejiang Jiuli Special Materials Technology Co., Ltd., Shandong Taishan Iron and Steel
Group Co., Ltd., Metallurgical Industry Information Standards Institute.
The main drafters of this standard. Lufeng Hui, Li Changyi, Shao Yu, Kang Xi Tang, Qi Haiyan, Jihai, Zhao Zhangfei, Dong Li, LIU Shang-hua.
This standard replaces the previous standard published case.
--- GB/T 12770-1991, GB/T 12770-2002.
Mechanical structure with stainless steel welded pipe
1 Scope
This standard specifies the mechanical structure with stainless steel welded pipe and classification code, ordering the content, size, shape, weight and tolerances,
Technical requirements, test methods, inspection rules, packaging, marking and quality certification.
This standard applies to machinery, automobiles, bicycles, furniture and other mechanical components and structures made of stainless steel welded steel pipe (hereinafter referred to as steel).
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 222 chemical composition of finished steel tolerance
GB/T 223.9 steel and aluminum alloys - Determination of chromium content Azure S Spectrophotometry
Determination of GB/T 223.11 steel and alloy chromium content of visual titration or potentiometric titration
Spectrophotometric determination of titanium content GB/T 223.16 Methods for chemical analysis of iron, steel and alloy The chromotropic acid
GB/T 223.18 Methods for chemical analysis of iron, steel and alloy The sodium thiosulfate separation - determination of copper content Iodometry
GB/T 223.19 Methods for chemical analysis of iron, steel and alloy neocuproine - chloroform extraction spectrophotometric determination of copper content
Determination of nickel content GB/T 223.25 Methods for chemical analysis of iron, steel and alloy dimethylglyoxime gravimetric method
GB/T 223.26 steel and alloy - Determination of molybdenum content - Thiocyanate spectrophotometric
GB/T 223.28 Determination of molybdenum steel and alloy chemical analysis method α- benzoin gravimetric method
GB/T 223.36 Methods for chemical analysis of iron, steel and alloy distillation - neutralization titration method for the determination of nitrogen
GB/T 223.37 Methods for chemical analysis of iron, steel and alloy distillation - indophenol blue photometric method for the determination of nitrogen
GB/T 223.40 Determination of steel and alloy niobium content sulphochlorophenol S spectrophotometry
GB/T 223.60 Methods for chemical analysis of iron, steel and alloy perchloric acid dehydration gravimetric method for the determination of silicon content
GB/T 223.62 Methods for chemical analysis of iron, steel and alloy butyl acetate extraction spectrophotometric determination of phosphorus content
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy The sodium (potassium) for Determination of amount
Determination of sulfur content of potassium iodate titration method after GB/T 223.68 Methods for chemical analysis of iron, steel and alloy tube furnace combustion
GB/T 223.69 after carbon and alloy steel - Determination of the pipe furnace combustion gas volumetric method
GB/T 223.72 steel and alloy sulfur content - Gravimetric method
GB/T 223.84 steel and titanium alloys - Determination of two methane antipyrine spectrophotometry
After GB/T 223.85 steel and alloy sulfur content induction furnace combustion infrared absorption method
After the determination of GB/T 223.86 total carbon content and alloy steel induction furnace combustion infrared absorption method
RT Test Method. Test Part 1 GB/T 228.1 metallic materials tensile
GB/T 232 metallic materials - Bend test
Opening Test methods GB/T 242 metal tube expansion
GB/T 245 metal tube bead Test Method
GB/T 246 metal pipe Flattening test methods
GB/T 2102 Acceptance, packing, marking and quality certificate
GB/T 2975 Steel and steel products for mechanical testing and sample preparation position
GB/T 3323 steel fusion welded butt joints radiographic inspection and classification
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