GBJ 302-1988 Quality inspection and assessment standard for building heating, sanitation and gas engineering GBJ302-88
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Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Building Heating, Sanitary and Gas Engineering
Quality Inspection and Evaluation Standard
1989
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National Standard of the People's Republic of China
Building Heating, Sanitary and Gas Engineering
Quality Inspection and Evaluation Standard
GBJ302—88
Editing Department: Former Ministry of Urban and Rural Construction and Environmental Protection of the People's Republic of China Approving Department: Ministry of Construction of the People's Republic of China Implementation Date: September 1, 1989 Engineering Construction Standard Full-text Information System
W.bzsosO.cO Engineering Construction Standard Full-text Information System||tt ||Notice on the promulgation of the national standard "Uniform Standard for Inspection and Assessment of Construction and Installation Project Quality" and other six inspection and assessment standards (88) Jianbiao No. 335
According to the former State Construction Commission (79) Jianfa Shi No. 168 document and the former Ministry of Urban and Rural Construction and Environmental Protection (85) Chengke No. 293 notice, the six inspection and assessment standards including "Uniform Standard for Inspection and Assessment of Construction and Installation Project Quality" revised by the former Ministry of Urban and Rural Construction and Environmental Protection have been reviewed by relevant departments and are now approved as national standards for implementation on September 1, 1989. The provisions on elevators in the former national standards "Standards for Inspection and Assessment of Quality of Building Installation Projects" (Building Projects) TJ301-74, "Standards for Inspection and Assessment of Quality of Building Installation Projects" (Pipeline Projects) TJ302-74, "Standards for Inspection and Assessment of Quality of Building Installation Projects" (Electrical Projects) TJ303-75, "Standards for Inspection and Assessment of Quality of Building Installation Projects" (Ventilation Projects) TJ304-74 and "Standards for Inspection and Assessment of Quality of Building Installation Projects" (General Machinery and Equipment Installation Projects) TJ305-75 are abolished at the same time. The six approved inspection and assessment standards are managed by the Construction Supervision Department of the Ministry of Construction, and the names, numbers and interpretation units of each item are as follows: 1. "Uniform Standards for Inspection and Assessment of Quality of Building Installation Projects" GBJ300-88, and its specific interpretation and other work is the responsibility of the China Academy of Building Research. 2. "Standards for Inspection and Assessment of Quality of Building Projects" GBJ301-88, and its specific interpretation and other work is the responsibility of the China Academy of Building Research. 3. The "Quality Inspection and Assessment Standard for Building Heating, Sanitation and Gas Engineering" GBJ302-88, its specific interpretation and other work shall be the responsibility of Shenyang Construction Engineering Management Bureau. 4. The "Quality Inspection and Assessment Standard for Building Electrical Installation Engineering" GBJ303-88, its specific interpretation and other work shall be the responsibility of Zhejiang Provincial Construction Engineering Corporation Industrial Equipment Installation Company.
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5. The "Quality Inspection and Assessment Standard for Ventilation and Air Conditioning Engineering" GBJ304-88, its specific interpretation and other work shall be the responsibility of Shanghai Industrial Equipment Installation Company. 6. The "Quality Inspection and Assessment Standard for Elevator Installation Engineering" GBJ310-88. Its specific interpretation and other work shall be the responsibility of Beijing Equipment Installation Engineering Company. The publication and distribution of the above six inspection and assessment standards shall be the responsibility of China Construction Industry Press. Ministry of Construction of the People's Republic of China
November 5, 1988
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Revision Notes
This standard is revised by the Shenyang Construction Engineering Administration Bureau on the basis of the "Standard for Inspection and Assessment of Construction Installation Engineering Quality" (TJ302-74) "Pipeline Engineering" (hereinafter referred to as the original standard) in accordance with the former National Construction Committee (79) Jianfa Shizi No. 168 and the former Ministry of Urban and Rural Construction and Environmental Protection (85) Chengke Zi No. 293. Since gas engineering has been widely used in construction projects in various places in recent years, the content of indoor and outdoor gas engineering has been added. The revised standard is named "Standard for Inspection and Assessment of Building Heating, Sanitation and Gas Engineering Quality".
During the revision process, an investigation was conducted on the implementation of the original standard, and opinions from construction, design, scientific research and colleges and universities were widely heard. Some new items with relatively mature technology, new testing methods and comprehensive function inspection and assessment were added. In view of the common quality problems of "leakage, bubbling, dripping, leaking and blocking" in current projects, this revision focuses on the use function and structural quality. The basic items for evaluating the quality of sub-projects will be changed from qualitative to quantitative as much as possible, and divided into two levels of "qualified" and "excellent" to highlight its status in the inspection and evaluation of sub-project quality. This standard is divided into ten chapters, including general principles, indoor water supply, indoor drainage, indoor heating and hot water supply, indoor gas, outdoor water supply, outdoor drainage, outdoor heating, outdoor gas and boiler and auxiliary equipment installation projects. During the revision process, opinions from various regions and relevant departments were sought many times, and the review meeting was held in Guiyang City in March 1987 for review and approval.
In the process of implementing this standard, please send your opinions and relevant materials to the Shenyang Construction Engineering Administration for reference in future revisions. Construction Supervision Department of the Ministry of Construction
October 24, 1988
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Chapter 1
General Principles·
Chapter 2 Indoor Water Supply Project·
Section 1 Pipe Installation Project
Section 2 Pipe Accessories and Sanitary Ware Water Supply Accessories Installation Project Section 3 Ancillary Equipment Installation Project·
Chapter 3 Indoor Drainage Project
Section 1 Pipe Installation Project...
Section 2 Sanitary Ware Installation Project
Chapter 4 Indoor Heating and Hot Water Supply Project.. .
Section 1
Pipeline installation project·
Section 2
Section 3
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Chapter 9
Radiator and solar water heater installation project ancillary equipment installation project
Indoor gas project
Outdoor water supply project
Outdoor drainage project
Outdoor heating project
Outdoor gas project
Section 1 Pipeline installation project·
Section 2 Pressure regulating device installation project
Chapter 10 Boiler and ancillary equipment installation project Section． Boiler installation project…
Section 3
Section 3
Appendix 1
Appendix 2
Appendix 3
Boiler accessory equipment installation project
Boiler accessories installation project
Term comparison table
Term explanation
Main inspection tool table
Appendix 4
Explanation of terms used in this standard
Additional instructions
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Chapter 1 General Provisions
Article 1.0.1 This standard is formulated to unify the inspection and assessment methods for the quality of building heating, sanitation and gas engineering, promote enterprises to strengthen management and ensure engineering quality. Article 1.0.2 This standard applies to the inspection and assessment of the quality of indoor heating, sanitary and gas engineering and water supply, drainage, heating and gas pipelines of civil buildings (communities) and overall boiler installation engineering. Article 1.0.3 The main indicators and requirements of this standard are proposed in accordance with the provisions of "Heating and Sanitary Engineering Construction and Acceptance Code" GBJ242-82 and "Urban Gas Design Code" TJ28-78 (Trial).
When implementing this standard, the provisions of the "Uniform Standard for Inspection and Assessment of Building Installation Engineering Quality" shall also be followed.
Article 1.0.4
In the guarantee item clauses of this standard, if the number of inspections is not specified, all inspections shall be carried out.
Article 1.0.5 The excavation, masonry, concrete main and waterproofing engineering of equipment foundations, trenches, wells and pools shall be inspected and assessed in accordance with the provisions of the corresponding chapters of the "Standard for Inspection and Assessment of Building Engineering Quality".
Chapter 2
Indoor water supply project
Article 2.0.1 This chapter applies to the inspection and assessment of the quality of indoor water supply and fire protection pipeline installation projects with a working pressure not exceeding 0.6MPa (~6kgf/cm). Section 1 Pipeline Installation Project
Article 2.1.1 This section applies to the installation of water supply cast iron pipes, galvanized and non-galvanized carbon steel pipes.
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(I) Guarantee Items
Article 2.1.2 The water pressure test results of concealed pipelines and water supply and fire protection systems must comply with the design requirements and construction specifications. Inspection method Check the system or partition (section) test records. Section 2.1.3. Pipes and pipe supports (piers) are strictly prohibited from being laid on frozen soil and untreated loose soil.
Inspection method: Observation inspection or inspection of hidden engineering records. Article 2.1.4: The water supply system must be flushed after completion or before it is put into use. Inspection method: Inspection of flushing records.
(I) Basic items
Article 2.1.5: The slope of the pipeline shall meet the following requirements: Qualified: The positive and negative deviations of the slope shall not exceed 1/3 of the slope value required by the design. Excellent: The slope meets the design requirements.
Inspection quantity: 2 sections shall be randomly inspected for every 50m of the straight pipe section in the system, and no less than 1 section shall be inspected for less than 50m; for buildings with partition walls, the number of sections shall be divided by the partition wall, and 5% shall be randomly inspected, but no less than 5 sections.
Inspection method: Use a level (level ruler), a pull line and a ruler to inspect or inspect hidden engineering records.
Article 2.1.6 The threaded connection of carbon steel pipes shall comply with the following provisions: Qualified: The processing accuracy of pipe threads shall comply with the provisions of the international "Pipe Threads": The threads are clean and regular, and the number of broken or missing threads is not more than 10% of the total number of threads; the connection is firm; there are exposed threads at the root of the pipe threads: galvanized carbon steel pipes have no welded joints. Excellent: On the basis of qualified, there are no broken threads, the galvanized layer of galvanized carbon steel pipes and pipe fittings is not damaged, and the exposed part of the threads is well resistant to corrosion; there are no exposed oil hemp and other defects at the interface. bZxz.net
The number of inspections shall not be less than 10 interfaces.
Inspection method Observation or disassembly inspection.
Article 2.1.7 The flange connection of carbon steel pipelines shall comply with the following provisions: Engineering Construction Standard Full Text Information System
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Qualified: The butt joint is parallel and tight, perpendicular to the center line of the pipe, the screw is exposed to the nut, the gasket material meets the design requirements and construction specifications, and there is no double layer. Excellent: On the basis of qualified, the nut is on the same side, the length of the screw exposed to the nut is consistent, and is not greater than 1/2 of the screw diameter.
The number of inspections is not less than 5 pairs.
Inspection method Observation inspection.
Article 2.1.8 The welding of non-galvanized carbon steel pipes shall comply with the following provisions: Qualified: The straightness of the weld and the weld reinforcement surface meet the construction specifications, and there are no burn-through, cracks and obvious nodules, slag inclusions and pores on the weld surface. Excellent: On the basis of qualified, the weld wave is uniform and consistent, and there are no nodules, slag inclusions and pores on the weld surface.
The number of inspections shall not be less than 10 welds.
Inspection method Observation or inspection with a welding inspection ruler. Article 2.1.9 The socket and sleeve joints of metal pipes shall comply with the following provisions:
Qualified: The joint structure and the filler used shall comply with the design requirements and construction specifications; the gray joint is dense and full; the filler is not more than 2mm recessed into the edge of the socket; the rubber ring joint is straight and without distortion, and the joint gap is accurate.
Excellent: On the basis of qualified, the gap of the annular seam is evenly hooked, the gray joint is flat and smooth, and the maintenance is good. The rebound gap of the rubber ring joint meets the construction specifications. The number of inspections shall not be less than 10 joints.
Inspection method Observation and measurement inspection.
Article 2.1.10 The installation of pipeline supports (hanging, brackets) and pipe seats (piers) shall comply with the following provisions:
Qualified: The structure is correct and the buried is flat and firm. Excellent: On the basis of qualified, the arrangement is neat, and the bracket is in close contact with the pipe. Inspection quantity: 5% of each, but no less than 5 pieces (pieces). Inspection method: Observation or manual inspection.
Article 2.1.11 The installation of valves shall meet the following requirements: Qualified: Model, specification, pressure resistance and tightness test results meet the design engineering construction standard full text information system
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requirements and construction specifications, the position and inlet and outlet directions are correct, and the connection is firm and tight. Excellent: On the basis of qualification, the opening and closing are flexible, the direction is reasonable, and the surface is clean.
Inspection quantity: 5% of each specification and model are randomly inspected, but no less than 10. Inspection method: Manual inspection and inspection of factory certificates and test sheets. Article 2.1.12 The anti-corrosion layer of buried pipelines shall meet the following requirements: Qualified: The material and structure meet the design requirements and construction specifications; the coils and pipelines and each layer of coils are firmly pasted.
Excellent: On the basis of qualified, the surface is flat, without wrinkles, hollows, slippage and loose sealing.
Number of inspections: One spot is randomly inspected every 20m, but not less than 5 spots. Inspection method: Observation or cutting of the anti-corrosion layer for inspection. Article 2.1.13 The painting of pipes, boxes and metal brackets shall comply with the following provisions:
Qualified: The type of paint and the number of times of painting meet the design requirements, with good adhesion, no peeling, blistering and missing paint.
Excellent: On the basis of qualified, the paint film thickness is uniform, the color is consistent, and there is no run-off and pollution.
Number of inspections: not less than 5 spots.
Inspection method: Observation and inspection.
(III) Allowable deviation items
Article 2.1.14 The allowable deviation and inspection method for the installation of indoor water supply pipes shall comply with the provisions of Table 2.1.14.
Number of inspections
1. Vertical and horizontal bends in horizontal pipelines: 2 sections are randomly inspected for every 50m of the straight pipe length of the system, and no less than 1 section is required if the length is less than 50m; for buildings with partition walls, the number of sections is divided by the partition walls, and 5% is randomly inspected, but no less than 5 sections;
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Allowable deviations and inspection methods for indoor water supply pipeline installation Item
Water supply steel
Horizontal pipe
Road level, horizontal
Bending
Vertical pipe
Insulation layer
Carbon steel
Full length (over 25m)
Pipe diameter less than or equal to 100m
Pipe diameter greater than 100mm
Pipe diameter less than or equal to 100m
(over 25m)Pipe diameter greater than 100mm
Water supply cast
Carbon steel pipe
Surface flat
Note: It is the thickness of the insulation layer.
Full length (over 5m)
Full length (over 5m)
Coil or plate
Apply or other
Table 2.1.14
Allowance deviation
Not more than 25
Not more than 13
Not more than 25
Not more than 15
Not more than 10
Inspection method
Use level
rule, ruler,
string and ruler
measure and check
hanging wire and||t t||Measurement and inspection
Use 2m ruler
and wedge-shaped feeler gauge to check
Use steel needle to penetrate
insulation layer and measure
2. Verticality of vertical pipes: one vertical pipe is one section. For two floors or more, divide them into sections by floor. Check 5% of each section, but no less than 10 sections in total; 3. Insulation layer: For horizontal pipes and vertical pipes, if they can be divided into sections by partition walls or floors, the pipe section in the partition wall of each floor shall be a spot check point, with a spot check number of 5%, but no less than 5 places. If they cannot be divided into sections by partition walls or floors, check 1 place every 20m, but no less than 5 places.
Section 2 Pipeline accessories and sanitary ware water supply accessories installation project Article 2.2.1 This section applies to the installation of pipe accessories such as drinking fountains, water meters, fire hydrants, sprinklers, and various sanitary ware faucets, angle valves, stop valves and other water supply accessories.
(I) Guarantee items
Article 2.2.2 The position, spacing and direction of the sprinkler heads of automatic sprinkler and water curtain fire-fighting devices must comply with the design requirements and construction specifications. Inspection method Observation and comparison with drawings and construction specifications. (I) Basic items
Article 2.2.3 The exposed household water meter shall meet the following requirements: the net distance between the outer shell of the meter and the wall surface is 1030mm; the height deviation between the center of the water inlet of the water meter and the ground is not more than 20mm.
Excellent: On the basis of being qualified, the installation is flat, and the height deviation of the center of the water meter inlet from the ground is less than 10mm.
Number of inspections: 10% are randomly inspected, but not less than 5. Inspection methods: Observation and measurement inspection.
Article 2.2.4 The installation of box-type fire hydrants shall comply with the following provisions: Qualified: The hydrant mouth faces outward, and the distance between the valve and the ground and the box wall meets the requirements of the construction specifications.
Excellent: On the basis of being qualified, the water hose is tightly tied to the fire hydrant and the quick connector, and is rolled and hung on a tray or bracket. Number of inspections: The total number of groups in the system is less than 5 groups, and all are inspected; if it is greater than 5 groups, 1/2 are randomly inspected, but not less than 5 groups.
Inspection methods: Observation and measurement inspection.
Article 2.2.5. The installation of sanitary ware water supply accessories shall comply with the following provisions: Qualified: chrome-plated parts are intact and undamaged, the interface is tight, and the opening and closing parts are flexible. Excellent: On the basis of qualified, the installation is correct, the surface is clean, and there is no exposed oil. Inspection quantity: 10% of each group, but no less than 5 groups. Inspection method: observation and opening and closing inspection.
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