GB/T 5836.1-1992 Rigid polyvinyl chloride pipes for building drainage

This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of rigid polyvinyl chloride pipes made of polyvinyl chloride resin as the main raw material and necessary additives through extrusion. This standard applies to pipes for drainage in civil buildings. Under the condition of considering the chemical resistance and heat resistance of the material, it can also be used for industrial drainage pipes. GB/T 5836.1-1992 Rigid polyvinyl chloride pipes for building drainage GB/T5836.1-1992 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Unplasticized polyvinyl chloride pipes for drainage in buildings
Unplasticized polyvinyl chloride pipes for drainage in buildingsGB/T 5836.1--92
Replaces GB5836-86
This standard adopts the 1991 edition of the international standard ISO3633 "Unplasticized polyvinyl chloride (PVC-U) pipes and fittings for sewage and wastewater (high and low temperature) systems in buildings - Specifications".
1 Subject content and scope of application
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of unplasticized polyvinyl chloride pipes (hereinafter referred to as pipes) made of polyvinyl chloride resin as the main raw material and added with necessary additives through extrusion. This standard applies to pipes for drainage in civil buildings. Under the condition of considering the chemical resistance and heat resistance of the material, it can also be used for industrial drainage pipes.
2 Reference standards
GB2828 Procedure and table for sampling by counting for batch inspection (applicable to inspection of continuous batches) GB2918 Standard conditions for state adjustment and testing of plastic specimens GB6671.1 Determination of longitudinal shrinkage rate of rigid polyvinyl fluoride (PVC-U) pipes GB8802 Determination method of Vicat softening temperature of rigid polyvinyl chloride (PVC-U) pipes and fittings GB8804.1 Test method for tensile properties of thermoplastic plastic pipes Polyvinyl chloride pipes GB8805 Measurement method for bending of rigid plastic pipes GB8806 Measurement method for size of plastic pipes
GB/T14152 Test method for external impact resistance of thermoplastic plastic pipes True impact force method 3 Product classification
Pipe specifications are expressed as d. (nominal outer diameter) × e (nominal wall thickness) as shown in Figure 1, and the nominal outer diameter and wall thickness are shown in Table 1. Approved by the State Bureau of Technical Supervision on December 16, 199236
Implemented on August 1, 1993
Nominal outer diameter
Average outer diameter
Limit deviation
Note: The length can also be determined by negotiation between the supplier and the buyer. 4 Technical requirements
4.1 Color
GB/T5836.1—92
Figure 1 Nominal outer diameter and wall thickness of pipes
Wall thickness e
Basic dimensions
Pipes are generally gray, and other colors can be agreed upon by the supplier and the buyer. 4.2 Appearance
Limit deviation
Basic dimensions
Length L
Limit deviation
The inner and outer walls of the pipe should be smooth and flat, and no bubbles, cracks, obvious marks, depressions, uneven color and decomposition discoloration lines are allowed. 37
4.3 Dimensional deviation
GB/T 5836.1—92
The average outer diameter, wall thickness and length limit deviation of the pipe shall comply with the provisions of Figure 1 and Table 1. 4.4 Wall thickness deviation of the same section of the pipe
The wall thickness deviation of the same section of the pipe shall not exceed 14%. 4.5 Curvature of the pipe
The curvature of the pipe shall be less than 1%.
4.6 The two end faces of the pipe shall be cut perpendicular to the axis. 4.7 Physical and mechanical properties
The physical and mechanical properties of the pipe shall comply with the provisions of Table 2. Table 2
Tensile yield strength, MPa
Elongation at break, %
Vicat softening temperature, ℃
Flat test
Drop weight impact test TIR\
or o℃
Longitudinal shrinkage, %
Superior product
No crack
TIR≤10%
TIR≤5%
Note: 1) TIR is the true impact rate.
5 Test method
5.1 Sample pretreatment
Qualified products
No cracks
9/10 passed
9/10 passed
Test method
Unless otherwise specified, the sample shall be conditioned at 23±2℃ for 24h according to GB2918, and the test shall be carried out under the same conditions.
5.2 Appearance inspection
Observe directly with the naked eye, and the interior can be illuminated with a light source. 5.3 Pipe size measurement
5.3.1 Average outer diameter
Measure the average outer diameter of the sample according to GB8806. Take the maximum and minimum values ​​of the measurement results to calculate the deviation value. 5.3.2 Wall thickness
Measure the wall thickness according to GB8806. Take the maximum and minimum values ​​to calculate the wall thickness deviation value. 5.4 Wall thickness deviation of the same section of the pipe
Use the wall thickness measurement results of 5.3.3 to calculate the wall thickness deviation of the same section of each sample, and take the maximum deviation as the test result. Calculation formula:
Where: - Wall thickness deviation of the same section, %;
GB/T5836.1-92
e2× 100
1 Maximum wall thickness measured on the same section, mm; e2- Minimum wall thickness measured on the same section, mm. 5.5 Pipe bending
Measured in accordance with GB8805.
5.6 Test methods for physical and mechanical properties of pipes
5.6.1 Tensile yield strength and elongation at break shall be determined in accordance with GB8804.1.
5.6.2 Vicat softening temperature
Determined in accordance with GB8802.
5.6.3 Flatness test
5.6.3.1 Test specimen
Take a section of 50±1.0mm from each of the three pipes. Both ends should be cut flat and perpendicular to the axis. 5.6.3.2 Test equipment
As specified in 5.6.1.
5.6.3.3 Test steps
Place the specimen horizontally between the upper and lower pressure plates of the testing machine. Compress the specimen at a speed of 10±5mm/min. Unload immediately when the specimen is compressed to 50% of its outer diameter. All three specimens are qualified if they are not damaged or broken. 5.6.4 Drop hammer impact test
5.6.4.1 Drop hammer impact test for superior products
Test according to GB/T14152. The test temperature is 20±2℃, or 0±1℃. The drop hammer mass and drop height should comply with the requirements of Table 3.
Nominal outer diameter
20℃Test conditions
Drop weight, kg
1.375±0.005
1.5±0.005
2.25±0.005
2.75±0.005
2.75±0.005
3.25±0.005
5.6.4.2 Drop weight for qualified products Impact test
Drop height, m
0℃Test conditions
Weight of drop weight, kg
0.25±0.005
0.25±0.005
0.5±0.005
0.5±0.005
Drop height, m
Experimental conditions are the same as 5.6.4.1. After the sample is impacted 10 times, if there are more than two damages, the sample is unqualified. If there is no damage in 9 of the 10 impacts, it is qualified.
5.6.5 Longitudinal shrinkage
Test according to the provisions of GB6671.1.
6 Inspection rules
GB/T 5836.1—92
6.1 Products must be inspected and qualified by the quality inspection department of the manufacturer and accompanied by a certificate of conformity before they can leave the factory. 6.2 Batch
The same specification of pipes produced under the same raw materials, formula and process is a batch, and the quantity of each batch shall not exceed 30t. If the production quantity is small and the production period of 6 days is less than 30t, the 6-day output shall be a batch. 6.3 Factory inspection
6.3.1 The factory inspection items are the longitudinal shrinkage rate and flatness test in 4.1~~4.5 and 4.6. 6.3.2 The inspection of 4.1~4.5 adopts the normal inspection sampling plan according to GB2828, taking the general inspection level I and the qualified quality level 6.5, see Table 4.
Batch range
151~280
281500
501~1200
1 201~3 200
3201~10000
Sample size
Number of qualified judgments
Number of unqualified judgmentsbZxz.net
6.3.3 Randomly select no less than three samples from the qualified products of counting sampling and conduct the longitudinal shrinkage and flatness tests in Article 4.6.
6.4 Type inspection
According to the technical requirements of this standard and the provisions of Article 6.3.2, the samples in Articles 4.1~4.5. Randomly select enough samples from the qualified samples and conduct the various tests in Article 4.6. Generally, at least once every six months. If any of the following situations occurs, type inspection should be carried out.
Trial production and identification of new products or old products transferred to the factory for production; when there are major changes in structure, materials, and processes that may affect product performance; when the product is resumed after a long period of suspension; when the factory inspection results are significantly different from the last type inspection; d.
When the national quality supervision agency proposes a requirement for type inspection e.
6.5 Judgment rules
4.1~4.5 shall be judged according to the provisions of Table 3. When one of the physical and mechanical properties fails to meet the specified indicators, double samples can be randomly selected for re-inspection of the item. If it still fails, the batch shall be judged as unqualified. Marking, packaging, transportation, storage
7.1 Marking
The product should have obvious markings: product name, this standard number, product specifications, manufacturer name (trademark) and production date. 7.2 Packaging
According to user requirements.
7.3 Transportation
GB/T 5836. 1--92
The product shall not be subjected to severe impact, throwing and heavy pressure during loading, unloading and transportation. 7.4 Storage
The pipe storage site should be flat, the stacking should be neat, the stacking height should not exceed 1.5m, and the distance from the heat source should be not less than 1m. It is not allowed to be exposed to the sun in the open air. The storage period is generally not more than two years from the date of production. Additional remarks:
This standard is proposed by the Ministry of Light Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Plastic Products. This standard was drafted by the China Building Standard Design Institute and the Plastic Processing and Application Science Research Institute of the Ministry of Light Industry. The main drafters of this standard are Song Weiru, Liu Qiuning, Huang Jiansheng, Shen Hong and Bai Hongwen.
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