GB 50184-1993 Industrial metal pipeline engineering quality inspection and assessment standard
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Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
50184—93
Industrial Metal Pipeline Engineering Quality
Inspection and Assessment Standard
Standard for quality inspection and assessment ofindustrialmatelpipelineengineeringConstruction Standard
1992—06—24
1994—02—01
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full-text Information System
Jointly Issued
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Industrial Metal Pipeline Engineering Quality InspectionbzxZ.net
Assessment Standard
GB50184—93
Editor Department: Ministry of Chemical Industry of the People's Republic of ChinaApproval Department: Chinese Ministry of Construction of the People's Republic of China Date of implementation: February 1, 1994
Full text information system of engineering construction standards
Full text information system of engineering construction standards
Notice on the release of the national standard "Industrial Metal Pipeline Engineering Quality Inspection and Assessment Standard"
Construction Standard [1993] No. 456
According to the requirements of the State Planning Commission's document [1987] No. 2390, the "Industrial Metal Pipeline Engineering Quality Inspection and Assessment Standard" jointly formulated by the Ministry of Chemical Industry and relevant departments has been reviewed by relevant departments. The "Industrial Metal Pipeline Engineering Quality Inspection and Assessment Standard" GB50184-93 is now approved as a mandatory national standard and will be implemented from February 1994.
This standard is managed by the Ministry of Chemical Industry, and the specific interpretation and other work is the responsibility of the Construction Technology Research Institute of the Ministry of Chemical Industry. The publication and distribution is organized by the Standard and Quota Research Institute of the Ministry of Construction. Ministry of Construction of the People's Republic of China
June 24, 1993
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Preparation Instructions
This standard is compiled by the Ministry of Chemical Industry in accordance with the requirements of the State Planning Commission's Document No. 2390 [1987], and is compiled by the Construction Technology Research Institute of the Ministry of Chemical Industry in conjunction with the Ministry of Metallurgy, the Ministry of Energy, the Sichuan Provincial Construction Committee and the China Petrochemical Corporation. It was approved by the Ministry of Construction on June 24, 1993 with Document No. (93) Jianbiao 456, and was jointly issued with the State Administration of Technical Supervision. In the process of compiling this standard, the standard compilation team conducted extensive investigations and studies, carefully summarized the practical experience of quality inspection and evaluation of industrial metal pipeline projects in my country, and also referred to relevant international standards and advanced foreign standards, and widely solicited opinions from relevant units across the country. Finally, our ministry and relevant departments reviewed and finalized the draft. Since this standard is used in conjunction with the national standard "Industrial Pipeline Engineering Construction and Acceptance Specification" (Metal Pipe Part GBJ235-82), the content has been revised accordingly during the revision process, and the inspection items have been adjusted to meet the needs of industrial pipeline engineering inspection and evaluation. In view of the fact that this standard is compiled for the first time, during the implementation process, it is hoped that all units will combine engineering practice and scientific research, carefully summarize experience, and pay attention to accumulating information. If any modification or supplement is found, please send your opinions and relevant information to the Construction Technology Research Institute of the Ministry of Chemical Industry (Huaizhong Middle Road, Shijiazhuang City, Postal Code: 050021), and copy it. Sent to the Ministry of Chemical Industry for reference in future revisions.
Ministry of Chemical Industry
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Chapter 1 General
Principles···
Engineering Division, Quality Inspection and Evaluation Procedures and Quality Grade Division..(2) Chapter 2
Section 1
Section 2
Section 3
Chapter 3
Engineering Division.
Quality Inspection and Evaluation Procedures
........
Quality Grade Division| |tt||Inspection of pipes,
fittings and valves·
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Chapter 4
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Section 8
General provisions·
Inspection of steel pipes
Inspection of pressure-bearing cast iron pipes and fittings·
Nonferrous metals Metal pipe inspection
Valve inspection
Pipe fittings inspection
Hanger spring inspection
Bending pipe production
Tube coiling processing
High-pressure pipe thread and sealing surface processing
Jacked pipe processing
Welding medium and low-pressure pipe fittings processing
Compensator processing·
Pipeline support and hanger production
Chapter V Pipeline Welding
Section 1
General Provisions
Engineering Construction Standard Full Text Information System
000000000000
Engineering Construction Standard Full Text Information System
Section 2 Preheating and Heat Treatment
Section 3
Welding Joint Inspection·
Chapter 6 Pipeline Installation·
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Section 8
Section 9
Section 10
Chapter 7
General Provisions
Medium and Low Pressure Pipeline Installation
High Temperature and High Pressure Pipeline Installation||tt| |Installation of pipelines connected to transmission equipment
Installation of pressure-bearing cast iron pipelines.
Installation of nonferrous metal pipelines·
Installation of steam tracer and jacketed pipes
..000.0.
Installation of valves
Installation of compensators·
Installation of supports and hangers
Installation of static grounding
Pipeline system test
Section 1
Section 2
Section 3
Chapter 8
Hydraulic test
Air pressure test
Other tests
Pipeline System Purging and Cleaning
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Water Flushing
Air Purging
Steam Purging
Oil Cleaning
Pickling and Passivation·
Chapter 9 Pipeline Painting·
Chapter 10 Organization of Quality Inspection and Assessment
60000000
Appendix 1 Glossary
Appendix 2 List of Main Inspection Instruments
Engineering: 2 Standard Full Text Letter Information system
00000004
（36）
（(37)
（38)
（38)
Engineering construction standard full text information system
Appendix III Explanation of terms used in this standard
Additional explanation
Engineering construction standard full text information system
Engineering construction standard full text information system
Chapter 1 General
Article 1.0.1 This standard is formulated to unify the inspection and evaluation methods for industrial metal pipeline engineering quality, strengthen enterprise technical management, and ensure engineering quality. Article 1.0.2 This standard applies to the inspection and evaluation of carbon steel, alloy steel, stainless steel, pressure cast iron, and non-ferrous metal industrial pipelines in metallurgy, chemical industry, electric power, petrochemical industry, machinery, light industry, textile and other industries. The design pressure of the pipeline is 400Pa (absolute pressure) ~ 100.101MPa (absolute pressure), and the design temperature is -200 ~ 850℃. This standard does not apply to:
1. Pipelines belonging to the equipment body;
2. Instrument pipelines;
3. Nuclear power pipelines;
4. Pipelines dedicated to mines;
5. Trunk pipelines.
Note: Trunk pipelines refer to the following:
① Gas pipelines that transport gas from mining or production areas to urban residents and industrial enterprises; ② Oil pipelines that transport oil from main pumping stations to refineries and transshipment bases; ③ Pipelines that transport oil products from the main pump room of the factory to storage and transportation bases, docks and piers; ④ Oil and gas (steam) pipelines that cross the seabed or cross rivers. Section 1.0.Article 3 Inspection work should be carried out during the construction process, and quality assessment work should be carried out after the construction of the pipeline sub-project is completed. The construction unit should have construction records of the relevant project engineering, and the construction records should contain the project content specified in the relevant provisions of this standard. Article 1.0.4 This standard should be used in conjunction with the current national standard "Industrial Pipeline Engineering Construction and Acceptance Specifications".
Article 1.0.5 In addition to implementing this standard, the quality inspection and assessment of industrial metal pipeline projects should also comply with the provisions of the current relevant national standards. Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Chapter 2 Engineering Division, Quality Inspection and Assessment Procedures and Quality Grade Division
Section 1 Engineering Division
Article 2.1.1 Sub-projects should be components of sub-projects. In the same sub-project, pipeline systems with the same working medium and pipeline category should be classified as a sub-project. The pipeline system should be divided according to the specific conditions of the design and production process. In the sub-project, the sub-project that plays a decisive role in the quality of the project should be classified as the main sub-project. Class I and II pipelines and pipelines for toxic, Class A and Class B fire hazardous media should all be main sub-projects.
The classification of Class I and II pipelines and pipelines for toxic, Class A and Class B fire hazardous media should comply with the provisions of the current national standard "Industrial Pipeline Engineering Construction and Acceptance Specifications". Article 2.1.2 The sub-project should be a component of the unit project and should be divided according to the specialty in the unit project. The pipeline project in the same unit project should be a sub-project.
Article 2.1.3 In a unit project, when there is only a pipeline sub-project, the sub-project should be a unit project.
Section 2 Quality Inspection and Assessment Procedures
Article 2.2.1 The quality inspection and assessment work should be carried out step by step in the order of sub-project, sub-project and unit project.
Article 2.2.2 The quality assessment work of the sub-project should be carried out after its quality inspection work is completed. When the quality assessment result of a sub-project is unqualified, the quality assessment of the sub-project shall not be carried out.
Article 2.2.3 The quality assessment of sub-projects and unit projects shall be carried out in sequence after the quality assessment of the sub-projects is completed. Engineering 2 Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Article 2.2.4 When a unit project is constructed by several subcontracting units, its general contractor shall be fully responsible for the quality of the project; each subcontracting unit shall inspect and assess the quality of the sub-projects and sub-projects it undertakes in accordance with the provisions of this standard, and shall submit relevant information and assessment results to the general contractor.
Section 3 Quality Grade Classification
Article 2.3.1 The quality of sub-projects, sub-projects and unit projects in this standard shall be divided into two grades: "qualified" and "excellent". Inspection items are divided into guarantee items, basic items and allowable deviation items.
Article 2.3.2 The quality level of the sub-projects shall comply with the following provisions: I. Qualified:
1. Guaranteed projects shall comply with the provisions of this standard. 2. The parts (items) sampled for basic projects shall comply with the qualified provisions of this standard. 3. For the number of points sampled for each item of the allowable deviation item, no less than 70% of the measured values shall be within the allowable deviation range of this standard. The remaining measured values shall not exceed 10% of the allowable deviation value of this standard.
II. Excellent:
1. Guaranteed projects shall comply with the provisions of this standard. 2. The parts (items) sampled for each item of the basic project shall comply with the qualified provisions of this standard, and no less than 70% of the parts (items) shall comply with the excellent provisions, and the item shall be rated as excellent; the number of excellent items shall not be less than 80% of the total number of basic projects. When a certain item in the basic project has only the qualified standard and the quality situation meets the qualified requirements, the excellent rate of this item can be calculated as an excellent project.
3. Permissible Deviation Items In each sampling point, no less than 80% of the measured values shall be within the permissible deviation range of this standard. The remaining measured values shall not exceed 10% of the permissible deviation value of this standard.
Article 2.3.3 The quality grade of the sub-project shall comply with the following provisions: 1. Qualified: The quality of all sub-projects included shall be qualified. 2. Excellent: The quality of all sub-projects included shall be qualified, among which no less than 50% of the sub-projects shall be excellent; and all major sub-projects shall be excellent. Article 2.3.4 The assessment of the quality grade of the unit project shall comply with the following provisions: 1. When the unit project is composed of pipeline engineering only, the assessment result of the pipeline engineering shall be the quality grade of the unit project. 2. When the unit project is composed of pipeline engineering and other professional engineering, the pipeline engineering shall participate in the quality assessment of the unit project as a sub-project. Article 2.3.5 If a sub-project fails to meet the quality inspection and assessment, it must be handled in a timely manner. The quality grade of the project after the treatment shall be determined according to the following provisions: 1. The quality grade can be reassessed after rework. 2. If the statutory testing unit can meet the design requirements and relevant standards after partial treatment, the quality of the sub-project can only be evaluated as qualified. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 3 General Provisions for Inspection of Pipes, Pipe Fittings and Valves
Section 1
(1) Guarantee Items
Article 3.1.1 The materials, specifications and models of pipes, pipe fittings, valves and support and hanger springs shall meet the design requirements and specifications. Inspection method: Check the certificate of conformity, quality certificate or re-inspection (calibration) record. Inspection quantity: 10% shall be randomly inspected, and no less than 3 copies shall be inspected. (（I）Basic items
Article 3.1.2 The surface quality of pipes, pipe fittings, valves and support and hanger springs shall meet the following requirements:
Qualified: No cracks, shrinkage holes, slag inclusions, folds, heavy skin, sand holes, pinholes, local pits and bruises exceeding the allowable deviation of wall thickness; cast iron pipes shall have manufacturer's marks; brass pipes shall be free of green rust and severe dezincification, and stainless steel pipes shall be free of scratches and rust spots. Excellent: On the basis of qualified, the surface is smooth, the marks of alloy steel and cast iron pipes are obvious and clear, the brass pipes are free of dezincification, and the spring surface is free of rust. Inspection method: Observe and inspect, knock with a small hammer, and use a place Inspection with a magnifying glass, caliper and thickness gauge.
Number of inspections: 5% of each type shall be randomly inspected, and no less than 1 piece shall be inspected. Section 2 Inspection of Steel Pipes
(I) Guarantee Items
When the steel grade and furnace number of the high-pressure steel pipe delivered to the site do not match the steel grade and furnace number in Article 3.2.1 of the certificate
or there is no steel grade and furnace number, a calibration inspection must be carried out. The inspection quantity, methods, items, standards, etc. must comply with the current national standards and the relevant provisions of Chapter 2, Section 2 of the "Industrial Pipeline Engineering Construction and Acceptance Specifications" GBJ235-82. Engineering Construction Standards Full Text Information SystemArticle 4 When a unit project is constructed by several subcontractors, the general contractor shall be fully responsible for the quality of the project; each subcontractor shall inspect and evaluate the quality of the sub-items and sub-projects it undertakes in accordance with the provisions of this standard, and shall submit relevant information and evaluation results to the general contractor.
Section 3 Quality Grade Classification
Article 2.3.1 The quality of sub-items, sub-projects and unit projects in this standard shall be divided into two grades: "qualified" and "excellent". Inspection items are divided into guarantee items, basic items and allowable deviation items.
Article 2.3.2 The quality grade of sub-items shall comply with the following provisions: 1. Qualified:
1. Guarantee items shall comply with the provisions of this standard. 2. The sampled items (pieces) of basic items shall comply with the qualified provisions of this standard. 3. For each sampled point of the allowable deviation item, no less than 70% of the measured values shall be within the allowable deviation range of this standard. The remaining measured values shall not exceed 10% of the allowable deviation value of this standard.
2. Excellent:
1. Guarantee items shall comply with the provisions of this standard. 2. Each spot check of basic items shall comply with the qualified provisions of this standard, and no less than 70% of the spots check shall comply with the excellent provisions, and the item shall be rated as excellent; the number of excellent items shall not be less than 80% of the total number of basic items. When a basic item has only qualified standards and the quality meets the qualified requirements, the item can be calculated as an excellent item.
3. Allowable deviation items Among the points of each spot check, no less than 80% of the measured values shall be within the allowable deviation range of this standard. The remaining measured values shall not exceed 10% of the allowable deviation value of this standard.
Article 2.3.3 The quality level of the sub-project shall comply with the following provisions: 1. Qualified: The quality of the sub-projects contained shall all be qualified. 2. Excellent: The quality of all sub-projects should be qualified, among which more than 50% of the sub-projects should be excellent; and all major sub-projects should be excellent. Article 2.3.4 The evaluation of the quality level of unit projects shall comply with the following provisions: 1. When the unit project is composed of pipeline projects only, the evaluation result of the pipeline project is the quality level of the unit project. 2. When the unit project is composed of pipeline projects and other professional projects, the pipeline project participates in the quality evaluation of the unit project as a sub-project. Article 2.3.5 When the quality inspection and evaluation of a sub-project is unqualified, it must be handled in time, and the quality level of the project after processing shall be determined according to the following provisions: 1. The quality level can be re-evaluated after rework. 2. After partial treatment, if it is identified by the statutory testing unit that it can meet the design requirements and relevant standards, the quality of the sub-project can only be evaluated as qualified. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 3 General Provisions for Inspection of Pipes, Pipe Fittings and Valves
Section 1
(1) Guarantee Items
Article 3.1.1 The materials, specifications and models of pipes, pipe fittings, valves and support and hanger springs shall comply with the design requirements and specifications. Inspection method: Check the certificate of conformity, quality certificate or re-inspection (calibration) record. Inspection quantity: 10% shall be randomly inspected, and no less than 3 copies shall be inspected. (（I）Basic items
Article 3.1.2 The surface quality of pipes, pipe fittings, valves and support and hanger springs shall meet the following requirements:
Qualified: No cracks, shrinkage holes, slag inclusions, folds, heavy skin, sand holes, pinholes, local pits and bruises exceeding the allowable deviation of wall thickness; cast iron pipes shall have manufacturer's marks; brass pipes shall be free of green rust and severe dezincification, and stainless steel pipes shall be free of scratches and rust spots. Excellent: On the basis of qualified, the surface is smooth, the marks of alloy steel and cast iron pipes are obvious and clear, the brass pipes are free of dezincification, and the spring surface is free of rust. Inspection method: Observe and inspect, knock with a small hammer, and use a place Inspection with a magnifying glass, caliper and thickness gauge.
Number of inspections: 5% of each type shall be randomly inspected, and no less than 1 piece shall be inspected. Section 2 Inspection of Steel Pipes
(I) Guarantee Items
When the steel grade and furnace number of the high-pressure steel pipe delivered to the site do not match the steel grade and furnace number in Article 3.2.1 of the certificate
or there is no steel grade and furnace number, a calibration inspection must be carried out. The inspection quantity, methods, items, standards, etc. must comply with the current national standards and the relevant provisions of Chapter 2, Section 2 of the "Industrial Pipeline Engineering Construction and Acceptance Specifications" GBJ235-82. Engineering Construction Standards Full Text Information SystemArticle 4 When a unit project is constructed by several subcontractors, the general contractor shall be fully responsible for the quality of the project; each subcontractor shall inspect and evaluate the quality of the sub-items and sub-projects it undertakes in accordance with the provisions of this standard, and shall submit relevant information and evaluation results to the general contractor.
Section 3 Quality Grade Classification
Article 2.3.1 The quality of sub-items, sub-projects and unit projects in this standard shall be divided into two grades: "qualified" and "excellent". Inspection items are divided into guarantee items, basic items and allowable deviation items.
Article 2.3.2 The quality grade of sub-items shall comply with the following provisions: 1. Qualified:
1. Guarantee items shall comply with the provisions of this standard. 2. The sampled items (pieces) of basic items shall comply with the qualified provisions of this standard. 3. For each sampled point of the allowable deviation item, no less than 70% of the measured values shall be within the allowable deviation range of this standard. The remaining measured values shall not exceed 10% of the allowable deviation value of this standard.
2. Excellent:
1. Guarantee items shall comply with the provisions of this standard. 2. Each spot check of basic items shall comply with the qualified provisions of this standard, and no less than 70% of the spots check shall comply with the excellent provisions, and the item shall be rated as excellent; the number of excellent items shall not be less than 80% of the total number of basic items. When a basic item has only qualified standards and the quality meets the qualified requirements, the item can be calculated as an excellent item.
3. Allowable deviation items Among the points of each spot check, no less than 80% of the measured values shall be within the allowable deviation range of this standard. The remaining measured values shall not exceed 10% of the allowable deviation value of this standard.
Article 2.3.3 The quality level of the sub-project shall comply with the following provisions: 1. Qualified: The quality of the sub-projects contained shall all be qualified. 2. Excellent: The quality of all sub-projects should be qualified, among which more than 50% of the sub-projects should be excellent; and all major sub-projects should be excellent. Article 2.3.4 The evaluation of the quality level of unit projects shall comply with the following provisions: 1. When the unit project is composed of pipeline projects only, the evaluation result of the pipeline project is the quality level of the unit project. 2. When the unit project is composed of pipeline projects and other professional projects, the pipeline project participates in the quality evaluation of the unit project as a sub-project. Article 2.3.5 When the quality inspection and evaluation of a sub-project is unqualified, it must be handled in time, and the quality level of the project after processing shall be determined according to the following provisions: 1. The quality level can be re-evaluated after rework. 2. After partial treatment, if it is identified by the statutory testing unit that it can meet the design requirements and relevant standards, the quality of the sub-project can only be evaluated as qualified. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 3 General Provisions for Inspection of Pipes, Pipe Fittings and Valves
Section 1
(1) Guarantee Items
Article 3.1.1 The materials, specifications and models of pipes, pipe fittings, valves and support and hanger springs shall comply with the design requirements and specifications. Inspection method: Check the certificate of conformity, quality certificate or re-inspection (calibration) record. Inspection quantity: 10% shall be randomly inspected, and no less than 3 copies shall be inspected. (（I）Basic items
Article 3.1.2 The surface quality of pipes, pipe fittings, valves and support and hanger springs shall meet the following requirements:
Qualified: No cracks, shrinkage holes, slag inclusions, folds, heavy skin, sand holes, pinholes, local pits and bruises exceeding the allowable deviation of wall thickness; cast iron pipes shall have manufacturer's marks; brass pipes shall be free of green rust and severe dezincification, and stainless steel pipes shall be free of scratches and rust spots. Excellent: On the basis of qualified, the surface is smooth, the marks of alloy steel and cast iron pipes are obvious and clear, the brass pipes are free of dezincification, and the spring surface is free of rust. Inspection method: Observe and inspect, knock with a small hammer, and use a place Inspection with a magnifying glass, caliper and thickness gauge.
Number of inspections: 5% of each type shall be randomly inspected, and no less than 1 piece shall be inspected. Section 2 Inspection of Steel Pipes
(I) Guarantee Items
When the steel grade and furnace number of the high-pressure steel pipe delivered to the site do not match the steel grade and furnace number in Article 3.2.1 of the certificate
or there is no steel grade and furnace number, a calibration inspection must be carried out. The inspection quantity, methods, items, standards, etc. must comply with the current national standards and the relevant provisions of Chapter 2, Section 2 of the "Industrial Pipeline Engineering Construction and Acceptance Specifications" GBJ235-82. Engineering Construction Standards Full Text Information System
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