This standard applies to the quality inspection and evaluation of installation projects such as industrial equipment, industrial pipeline electrical installations, automation instruments, corrosion protection, thermal insulation, and industrial furnace masonry. GB 50252-1994 Unified Standard for Quality Inspection and Evaluation of Industrial Installation Projects GB50252-1994 Standard download decompression password: www.bzxz.net

Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
50252—94
Unified standard for quality inspection andassessment of industrial erection engineeringsConstruction Standard
1994—04—19bzxZ.net
1994—11—01
1Implementation
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
Unified standard for quality inspection andassessment of industrial erection engineerings engineeringsGB50252-94
Editor: Ministry of Chemical Industry of the People's Republic of ChinaApproval: Ministry of Construction of the People's Republic of ChinaEffective Date: (November 1, 1994
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Notice on the Release of the National Standard "Uniform Standard for Quality Inspection and Assessment of Industrial Installation Engineering"
Jianbiao [1994] No. 259
According to the requirements of the State Planning Commission's Document No. Jizong [1990] 160, the Ministry of Chemical Industry jointly formulated the "Uniform Standard for Quality Inspection and Assessment of Industrial Installation Engineering" with relevant departments The "Uniform Standard for Quality Inspection and Assessment of Industrial Installation Projects" has been reviewed by relevant departments. The "Uniform Standard for Quality Inspection and Assessment of Industrial Installation Projects" GB50252-94 is now approved as a mandatory national standard and will be implemented from November 1, 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
April 19, 1994
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
3 Division of projects for quality inspection and assessment
General provisions
Division of industrial equipment installation projects
Division of industrial pipeline projects
Division of electrical installation projects
Division of automated instrument installation projects
Division of industrial equipment and pipeline anti-corrosion projectsDivision of industrial equipment and pipeline insulation projectsDivision of industrial furnace masonry projects
Grades of quality inspection and assessment
Procedure and organization of quality inspection and assessment
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E|| tt||Appendix F
Name of industrial installation project sub-project and sub-project Quality inspection and evaluation table of sub-project
Quality evaluation table of sub-project
Quality assurance data inspection table
Comprehensive evaluation table of unit project quality
Terms used in this standard
Additional explanation
Engineering construction standard full text information system
Engineering construction standard full text information system
1 General
1.0.1 This standard is formulated to unify the inspection and evaluation methods of industrial installation project quality, promote enterprises to strengthen engineering technology management, and ensure project quality. 2 This standard applies to the quality inspection and evaluation of installation projects such as industrial equipment, industrial pipelines, electrical devices, automation instruments, anti-corrosion, insulation, and industrial furnace masonry. 3 The division of projects for quality inspection and evaluation of each specialty, the level of quality inspection and evaluation, the procedures and organization of quality inspection and evaluation shall comply with the provisions of this standard. This standard is compiled based on the current national construction and acceptance specifications for various professional installation projects.
1 This standard should be used in conjunction with the current national professional engineering quality inspection and evaluation standards for industrial equipment, industrial pipelines, electrical installations, automation instruments, corrosion protection, insulation, industrial furnace masonry, etc.
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
2 Terms
1 Major sub-projects
Sub-projects that have a significant impact on the quality of installation projects. 2.0.2
Main sub-projects
Sub-projects with large engineering quantities, large investment ratios, and significant impacts on project quality in installation projects.
Engineering Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Division of Engineering for Quality Inspection and Assessment
3.1 General Provisions
Industrial installation projects subject to quality inspection and assessment shall be divided into sub-projects, sub-projects and unit projects.
Sub-projects shall be divided according to units, categories, materials, uses, media, systems, processes, etc., and shall comply with the provisions for the division of professional sub-projects. 3.1.3 Sub-projects shall be divided into industrial equipment, industrial pipelines, electrical installations, automation instruments, anti-corrosion, thermal insulation, industrial furnace masonry, etc. according to profession. 3.1.4 The names of sub-projects and sub-projects of industrial installation projects shall comply with the provisions of Appendix A of this standard.
3.1.5 Unit projects shall be divided according to industrial plants, workshops (work numbers) or areas, and unit projects shall be composed of professional installation projects. When a professional installation project has independent construction conditions or independent use functions, it can also constitute one or several unit projects. 3.2
Division of industrial equipment installation projects
1 Sub-projects should be divided according to the units and units of equipment. 3.2.2
Industrial equipment installation projects in the same unit project should be a sub-project. 3.2.3
8Large-scale and special industrial equipment installation projects can be divided into one or several sub-projects or unit projects according to the size of their engineering volume, and their sub-projects can be divided according to processes.
Division of industrial pipeline projects
1 Sub-projects should be divided according to working media or pipeline categories. 3.3.1
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
2Pipeline projects in the same unit project should be a sub-project. 3.3.3
3 In a unit project, when there is only a pipeline sub-project, the sub-project should be a unit project.
3.4 ​​Division of electrical installation projects
Sub-projects should be divided according to the independent electrical equipment in the industrial plant, workshop or area, 3.4.1
Combined electrical devices and their electrical lines. 3.4.2 The electrical installation project in the same unit project should be a sub-project.
In a unit project, when there is only an electrical installation sub-project, the sub-project should be a unit project.
Division of automation instrument installation projects
3.5.1 Sub-projects should be divided according to the type of instrument, the connected pipeline or the independent system formed by the connected lines. It can also be divided according to the purpose of the instrument. 3.5.2
The automation instrument installation project in the same unit project should be a sub-project.
Division of industrial equipment and pipeline anticorrosion projects3.6.1
Sub-projects should be divided according to the units (sets) of equipment or anticorrosion materials. 2 The industrial equipment and pipeline anticorrosion projects in the same unit project should be a 3.6.2
sub-project.
3.7 Division of industrial equipment and pipeline insulation projects3.7.1 Equipment in sub-projects should be divided according to units (sets) with the same working medium; pipelines should be divided according to the same working medium. 2 The industrial equipment and pipeline insulation projects in the same unit project should be a 3.7.2
sub-project.
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Division of industrial furnace masonry projects
1 Sub-projects should be divided according to the structure or section of the industrial furnace. 3.8.1
When the masonry work of an industrial furnace is less than 100m, one furnace can be regarded as a sub-project, or two or more parts of one furnace can be combined into one sub-project.
3.8.2 The sub-projects shall be divided according to the number of industrial furnaces. When there is only one sub-project in a sub-project, the sub-project is a sub-project. When the masonry volume of the industrial furnace is less than 500m, the industrial furnace masonry project can only be regarded as a sub-project. 3 The unit project shall be divided according to the industrial furnace masonry project of an independent production system. When there is only one sub-project in a unit project, the sub-project is a unit project.
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Grades of Quality Inspection and Evaluation
1 The quality of sub-projects, sub-projects, and unit projects of industrial installation projects shall be inspected and evaluated as "qualified" or "excellent". 2 The inspection items of the sub-project are divided into guarantee items, basic items and allowable deviation 4.0.2
items, and their quality levels shall comply with the following provisions: 4.0.2.1 Qualified
(1) Guarantee items must comply with the provisions of the corresponding quality inspection and assessment standards; (2) The quality of each sampled inspection point (item) of the basic items shall comply with the qualified provisions of the corresponding quality inspection and assessment standards;
(3) The qualified rate of the actual measured values ​​of the sampled inspection points of the allowable deviation items shall not be lower than the provisions of the corresponding quality inspection and assessment standards.
4.0.2.2 Excellent
(1) Guarantee items must comply with the provisions of the corresponding quality inspection and assessment standards; (2) The quality of each sampled inspection point (item) of the basic items shall comply with the qualified provisions of the corresponding quality inspection and assessment standards, and the number of excellent and good values ​​shall not be lower than the specified value of the excellent and good values ​​of the corresponding quality inspection and assessment standards;
(3) The qualified rate of the actual measured values ​​of the sampled inspection points of the allowable deviation items shall not be lower than the provisions of the corresponding quality inspection and assessment standards.
Note: ① Guarantee items. ② Basic items. ③ Permissible deviation items. During the inspection, a small number of inspection points are allowed to exceed the tolerance within the proportion range specified in this standard, and the inspection items that can still meet the safety and use function of the project can still meet the safety and use function of the project. 4.0.3
The quality level of the sub-project shall comply with the following provisions: 4.0.3.1 Qualified
The quality level of the sub-project shall be qualified. Engineering 6 Standard Full-text Information System
Engineering Construction Standard Full-text Information System
The quality level of the sub-project must be qualified, and the number of sub-projects that reach the excellent level shall not be less than 50%, and the quality level of the main sub-projects shall be excellent.
4 The quality level of the unit project shall comply with the following provisions: 4.0.4
4.0.4.1 Qualified
(1) The quality level of the sub-project shall be qualified; (2) The quality assurance information shall be basically complete.
(1) The quality grade of all sub-projects must be qualified, and the number of sub-projects that reach the excellent grade should not be less than 50%, and the quality grade of the main sub-projects should be excellent;
(2) The quality assurance information should be complete.
4.0.5 When the quality of a sub-project does not meet the qualified requirements in the corresponding quality inspection and evaluation standards, it must be reworked or processed in time, and its quality grade should be determined in accordance with the following provisions: 4.0.5.1
1 The quality grade of the reworked project can be re-evaluated; 4.0.5.2
If the processed project can meet the design requirements after being identified by the statutory testing unit, its quality grade can only be evaluated as qualified. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Quality Inspection and Evaluation Procedures and Organization
1 The quality inspection and evaluation procedures for industrial installation projects should be carried out in sequence according to sub-projects, sub-projects, and unit projects.
2 On the basis of the team self-inspection, the person in charge of the sub-project shall organize relevant personnel to conduct quality inspection and assessment, and the full-time quality inspector shall verify it. The quality inspection and assessment form of the sub-project shall adopt the format of Appendix B of this standard. 5.0.3
3 The person in charge of the unit project shall organize relevant personnel to conduct quality assessment of the sub-project, and the quality inspection department shall verify it.
The quality assessment form of the sub-project shall adopt the format of Appendix C of this standard. 5.0.4 The construction unit or the person in charge of the project shall organize relevant departments to conduct quality assessment of the unit project, and the construction unit or the project quality supervision department shall verify it. The quality assurance data inspection form shall adopt the format of Appendix D of this standard. The comprehensive quality assessment form of the unit project shall adopt the format of Appendix E of this standard. 5.0.5
When a unit project is constructed by several subcontracting units, its general contractor shall be fully responsible for the quality of the project. Each subcontractor shall inspect and assess the quality level of the sub-projects and sub-projects it undertakes according to this standard and the corresponding professional standards, and submit the assessment results and information to the general contractor.
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3 The person in charge of the unit project shall organize relevant personnel to conduct quality assessment for the sub-project, and the quality inspection department shall verify it.
The quality assessment form for sub-projects should adopt the format of Appendix C of this standard. 5.0.4 The person in charge of the construction unit or the project shall organize relevant departments to conduct quality assessment for the unit project, and the construction unit or the project quality supervision department shall verify it. The quality assurance data inspection form should adopt the format of Appendix D of this standard. The comprehensive quality assessment form for unit projects should adopt the format of Appendix E of this standard. 5.0.5
When a unit project is constructed by several subcontracting units, the general contractor shall be fully responsible for the quality of the project. Each subcontracting unit shall inspect and assess the quality level of the sub-projects and sub-projects it undertakes in accordance with this standard and corresponding professional standards, and submit the assessment results and information to the general contractor.
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3 The person in charge of the unit project shall organize relevant personnel to conduct quality assessment for the sub-project, and the quality inspection department shall verify it.
The quality assessment form for sub-projects should adopt the format of Appendix C of this standard. 5.0.4 The person in charge of the construction unit or the project shall organize relevant departments to conduct quality assessment for the unit project, and the construction unit or the project quality supervision department shall verify it. The quality assurance data inspection form should adopt the format of Appendix D of this standard. The comprehensive quality assessment form for unit projects should adopt the format of Appendix E of this standard. 5.0.5
When a unit project is constructed by several subcontracting units, the general contractor shall be fully responsible for the quality of the project. Each subcontracting unit shall inspect and assess the quality level of the sub-projects and sub-projects it undertakes in accordance with this standard and corresponding professional standards, and submit the assessment results and information to the general contractor.
Engineering Design Standard Full-text Information System
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