GBJ 235-1982 Industrial Pipeline Engineering Construction and Acceptance Specification Metal Pipe GBJ235-82 GBJ235-1982 Standard Download Decompression Password: www.bzxz.net

Information System
Design Standard
National Standard of the People's Republic of China
Industrial Pipe Engineering Construction and Acceptance Specification
Metal Pipe Section
JGJ83-91
1992Beijing
Wang Cheng Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
National Standard of the People's Republic of China
Industrial Pipe Engineering
Construction and Acceptance Specification
Metal Pipe Section
GBJ235-82
Editor Department: Ministry of Chemical Industry
Approval Department: National Capital Construction Committee Implementation Date: 1982 August 1, 2002
Wang Cheng Construction Standard Full Text Information System
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Document of the National Capital Construction Commission
(82) Jianfa Shizi No. 14
Notice on the Issuance of the "Industrial Pipeline Engineering Construction
and Acceptance Specifications" (Metal Pipeline Section) Relevant ministries and bureaus of the State Council, construction commissions of provinces, municipalities and autonomous regions, and capital construction engineering corps: The "Industrial Pipeline Engineering Construction and Acceptance Specifications" (Metal Pipeline Section) organized and compiled by our commission and entrusted to the Ministry of Chemical Industry has been approved as a national standard construction and acceptance specification after review and finalization by relevant departments, with the number GBJ235-82, and will be implemented from August 1, 1982.
This specification is managed and interpreted by the Capital Construction Bureau of the Ministry of Chemical Industry. January 13, 1982
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Preparation Instructions
According to the arrangement of the National Construction Committee (78) Jianfa Shizi No. 514, our department organized the Ministry of Petroleum, Metallurgy, Second Machinery, Electric Power and Sichuan, Jiangsu, Fujian and Shanxi Provincial Construction Committees to jointly compile the "Industrial Pipeline Engineering Construction and Acceptance Specification" (Metal Pipeline). This specification summarizes the experience of my country's metal industrial pipeline engineering design, construction and production and use over the past 30 years since the founding of the People's Republic of China. During the compilation process, we conducted extensive investigations and studies, solicited opinions from relevant departments across the country many times, held various types of seminars, discussions and review meetings, and referred to international and domestic standards. After repeated revisions, an approval meeting was held to review and finalize the draft.
This specification is arranged according to the construction procedures of industrial pipeline engineering and is divided into ten chapters. Chapter 1 stipulates the scope of application and general requirements of this specification. Chapters 2, 3, 4, 5, 6, 7, 8 and 9 make basic provisions for material inspection, pipeline processing, welding, installation, system testing, purging and cleaning, painting, insulation and other projects. Chapter 10 is the basic requirements for project acceptance.
With the development of construction, new technologies, new processes, new materials and new machines will continue to emerge. It is hoped that all units will seriously summarize experience and actively provide improvement suggestions in the process of implementing this specification so as to supplement and revise it in the future. This specification is managed by the Infrastructure Bureau of the Ministry of Chemical Industry, and the specific interpretation work is the responsibility of the Construction Company of Lanzhou Chemical Industry Corporation. For inquiries, please contact "Construction Company of Lanzhou Chemical Industry Corporation, Xigu District, Lanzhou City, Gansu Province". Infrastructure Bureau of the Ministry of Chemical Industry
December 20, 1981
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Chapter 1 General
Chapter 2 Inspection of Pipes, Pipeline Accessories and Valves Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Chapter 3
General Provisions
Inspection of Steel Pipes
Inspection of Cast Iron Pipes
Inspection of Nonferrous Metal Pipes| |tt||Valve Inspection·
Pipeline Accessories Inspection
Support and Hanger Spring Inspection
Pipeline Processing
Pipe Cutting:
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Section 8
Section 9
Section 10
Section Chapter 4
Bending pipe production
Tube coiling
Tube mouth flanging
High-pressure pipe thread and sealing surface processing
Jacked pipe processing
Medium and low-pressure pipe fittings processing
Compensator processing
Anti-corrosion lined pipe prefabrication
Pipe support and hanger production
Pipe prefabrication
Pipeline welding
Section 1
Section 2| |tt||General Provisions
Groove Processing and Joint Assembly
Engineering Section 1 Preheating and Heat Treatment
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Welding Inspection
Section 4
Pipeline Installation
Chapter 5
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6||t t||Section 7
Section 8
Section 9
Section 10
General Provisions
Installation of medium and low pressure pipelines
Installation of high pressure pipelines.
Installation of pipelines connected to transmission equipment.
Installation of cast iron pipes.
Installation of nonferrous metal pipelines
Installation of steam tracers and jacketed pipes
Installation of anti-corrosion lined pipelines
Valve installation Installation
Compensator Installation
Section 11
Section 12
Chapter 6
Support and Hanger Installation
Electrostatic Grounding Installation
Pipeline System Test
Section 1
Section 2
Section 3
Section 4
Chapter 7
General Provisions
Hydraulic TestWww.bzxZ.net
Air Pressure Test||t t||Other tests
Pipeline system purging and cleaning
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Chapter 8
General provisions
Water flushing
Air purging:
Steam purging
Oil cleaning
Pickling and passivation| |tt||Pipeline painting
Chapter 9
Pipeline insulation
Chapter 1 Standard acceptance
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Appendix 1 Common standards and reference data for pipeline construction: Appendix 1.1 Chemical composition, mechanical properties and hardness value data of commonly used steel pipes and pipe fittings
Appendix 1.2 Allowable leakage of gate valve sealing surface
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Appendix 1.3 Chemical composition, mechanical properties and hardness data of commonly used high-pressure bolts and nuts
Appendix 1.4 Formulas for pickling, neutralizing and passivating solutions for carbon steel and low-alloy steel pipelines
Appendix 1.5 Formulas for pickling solutions for stainless steel pipelines
Appendix II Contents and formats of technical documents for project completion Appendix 2.1 Inspection and acceptance (verification) records of high-pressure steel pipes Appendix 2.2
High-pressure valve test records
Safety valve adjustment test records
Appendix 2.3
Appendix 2.4 Inspection and acceptance records of high-pressure pipe fittings…Appendix 2.5 High-pressure pipe bending processing records..
Appendix 2.6
High-pressure pipe thread processing records·
Appendix 2.7
I and I type welding Seam welding work record
Appendix 2.8
Pipeline weld heat treatment and coloring inspection record·Pipeline system test record
Appendix 2.9
Appendix 2.10
Pipeline system flushing (degreasing) record·
Appendix 2.11 Concealed project (system closure) record..
Cast iron pipeline (buried) final water pressure test procedure Appendix III
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Chapter 1
Article 1.0.1
This specification applies to the construction and acceptance of carbon steel, alloy steel, stainless steel, cast iron and non-ferrous metal industrial pipelines in metallurgy, petroleum, chemical industry, machinery, electric power, light industry, textile and other industries. The design pressure is 3 mmHg (absolute pressure) ~ 1000 kgf/cm2 (gauge pressure, the same below), and the design temperature is -200 ~ 850℃.Article 2 This specification does not apply to:
1. Pipelines belonging to the equipment body;
2. Instrument pipelines;
3. Non-metallic pipelines,
4. Nuclear power pipelines;
5. Pipelines dedicated to mines;
6. Trunk pipelines [Note].
Article 1.0.3
Industrial pipeline construction can be graded according to the design pressure as the main parameter, see Table 1.0.3.
Pipeline classification
Grade name
Vacuum pipeline
Low-pressure pipeline
Medium-pressure pipeline
High-pressure pipeline
Design pressure p, kgf/cm2
0≤p≤16
16
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