People's Republic of China (PRC) national standard \ x0d \ GB/t10002.1-1996 \ x0d \ neq iso4422:1990 \ x0d \ iso4422: 2: 65438. 1 \x0d\ This standard stipulates that PVC resin is used as the main raw material, and the water supply for extrusion molding is \x0d\ China people * * * and the national standard \ x0d \ GB/t10002./-1996 \ x0d. Replace GB10002:1-88 \ x0d \ This standard is applicable to water supply pipes inside and outside buildings (overhead or underground). \x0d\ The pipes specified in this standard are suitable for conveying water with the temperature not exceeding 45℃ under pressure, including general use and drinking water transportation. {TodayHot} \x0d\2 Reference standards \x0d\ The following external standards contain provisions, which constitute the provisions of this standard through reference in this standard. At the time of publication of this standard, all versions shown are valid. All standards will be revised, and all parties using this standard should explore the possibility of using the latest version of the following standards. \x0d\GB 1033-86 test method of plastic density and relative density \x0d\GB 46 15-84 determination method of residual vinyl chloride monomer content in PVC resin \ x0d \ gb50749-85 hygienic standard for drinking water \ x0d \ GB 6 1 1 1-85 method for measuring the failure time of thermoplastic pipes under long-term constant internal pressure \x0d\ GB 6677X0d\GB 8805-88 method for measuring the bending of rigid plastic pipes \x0d\GB 8806-88 method for measuring the size of plastic pipes \ x0d \ GB 9644-88 Extraction methods and allowable values of lead, tin, cadmium and mercury in rigid polyvinyl chloride (PVC-U) drinking water pipes and fittings {HotTag} \x0d\ GB 13526-92 Immersion test method of rigid polyvinyl chloride (PVC-U) pipes and dichloromethane \ \x0d\ GB 65438\x0d\3.2 No other reprocessed materials shall be used. \x0d\4 product classification \x0d\4. 1 products are divided into elastic sealing ring connection type and solvent bonding type according to the connection form, as shown in figure 1 and figure 2. \x0d\ Figure 2 \x0d\4.2 Table 1 specifies the nominal pressure (PN) and pipe size. \x0d\ Table 1 Nominal pressure and specification of pipeline \x0d\4.3 Nominal pressure refers to the working pressure of water supply pipeline at 20℃. If the water temperature is between 25℃ and 45℃, the working pressure shall be corrected according to the pressure drop coefficient (ft) of different temperatures in Table 2. Multiply the droplet coefficient by the color pressure (PN) to get the maximum allowable working pressure. \x0d\5 Technical requirements \x0d\5. 1 appearance \x0d\ The internal and external surfaces of pipes shall be smooth and flat, free from depressions, decomposition discoloration lines and other surface defects that affect the performance. Pipes should not contain visible impurities. The end face of the pipeline should be cut flat and perpendicular to the axis. The inspection method is specified in 6. 1 \x0d\5.2 Opaque \x0d\ Pipes shall be opaque and shall be inspected according to the provisions of 6.2. \x0d\5.3 Pipeline size \x0d\5.3. 1 length \x0d\ Pipeline length is generally 4m, 6m, 8m, 12m, which can also be agreed by both parties. The length limit deviation is 0. 1%-0.2% of the length. Measured according to 6.3. 1, the length of the pipeline does not include the depth of the socket, and the measuring position is shown in Figure 3. \x0d\ Figure 3 Pipeline length \x0d\5.3.2 Pipeline bending shall comply with the provisions in Table 3. Measure as specified in 6.3.2. \x0d\5.3.3 The average outside diameter, deviation and out-of-roundness shall meet the requirements in Table 4. 0.6Mpa pipeline need not be out of roundness. Measure as specified in 6.3.3. \x0d\5.3.4 Wall thickness \x0d\5.3.4. 1 The wall thickness and deviation at any point of the pipeline shall comply with the provisions of Table 1 and Table 5, and shall be measured according to the provisions of 6.3.4. \x0d\5.3.4.2 The average wall thickness and allowable deviation of the pipeline shall conform to the provisions of Table 6 and be measured according to the provisions of 6.3.4. \x0d\5.3.5 Socket \x0d\ The minimum depth of the socket connected with rubber sealing ring shall comply with the provisions in Figure 1 and Table 7. \x0d\ The minimum depth of the solvent bonding socket and the middle diameter of the socket shall comply with the provisions in Figure 2 and Table 7. \x0d\ The wall thickness of the solvent-bonded socket shall not be less than 75% of the nominal wall thickness of the pipeline, that is, 0.75e The size of the socket shall be measured according to the provisions of 6.3.5. \x0d\5.3.6 The socket end of rubber sealing ring type pipeline shall be the size specified in Figure 1. \x0d\5.4 Physical properties shall conform to the provisions in Table 8. \x0d\5.5 The mechanical properties shall comply with the provisions in Table 9. \x0d\5.6 Hygienic indicators \x0d\ In order to make the pipeline conform to the provisions of Article 2. 1 of GB 5749, the hygienic indicators of drinking water pipelines should conform to the provisions of Table 10. \x0d\6 Test method \x0d\6. 1 Appearance \x0d\ Visual observation under light source. \x0d\6.2 Opacity \x0d\ Take a 400mm tube section, seal one end with opaque material, hold the tube wall in the direction of light source by hand under the condition of natural light at the tube side, and observe the inner surface of the sample with naked eyes from the open end of the tube. If the shadow of light source is not blocked by hand, it is qualified. \x0d\6.3 Dimension measurement \x0d\6.3. 1 length \x0d\ Measure with a steel tape with an accuracy of1mm. \x0d\6.3.2 Bending degree \x0d\ is measured according to GB 8805. \x0d\6.3.3 Average outside diameter and deviation and roundness \x0d\ Measure average outside diameter and deviation of average outside diameter according to GB 8806. \x0d\ Measure the maximum and minimum external diameters of the same section according to the provisions of GB 8806, and the maximum external diameter minus the minimum external diameter is out of roundness. \x0d\6.3.4 Wall thickness deviation and average thickness deviation \x0d\ Measure the maximum and minimum wall thickness along the circumference according to GB 8806. If it is less than 0. 1mm, proceed to 0. 1mm and calculate the wall thickness deviation. \x0d\ Measure the wall thickness of eight points evenly along the circumference of the same section of the pipeline, and calculate its arithmetic average, which is the average wall thickness; Less than 0. 1mm, rounded to 0. 1mm, and the difference between the average wall thickness and the nominal wall thickness is the average wall thickness deviation. \x0d\6.3.5 Socket depth and inner diameter \x0d\ Measure the socket depth according to the position specified in Figure 1 and Figure 2 with vernier caliper with accuracy of 0.00 1 mm, and measure two inner diameters perpendicular to each other in the middle of the socket with inner diameter gauge with accuracy of 0.00 1mm, and calculate their arithmetic average. \x0d\6.4 density \x0d\ tested according to GB 1033. \x0d\6.5 Vicat softening temperature \x0d\ Tested according to GB 8802. \x0d\6.6 Longitudinal shrinkage \x0d\ Tested according to GB 667 1. 1 \x0d\6.7 dichloromethane immersion test \x0d\ The test was carried out according to GB/T 13526, and the test condition was 15℃ 15min, with no change on the surface. \x0d\6.8 drop hammer impact test \x0d\ According to GB/T 14 152, the impact hammer radius of drop hammer impact test is 25mm, and the hammer mass and impact height are shown in table 1 1. \x0d\6.9 Hydrostatic test \x0d\ Test according to GB 611. See table 12 for test temperature and induced stress. Under the conditions specified in table 12, the pipeline is qualified without leakage or damage. \x0d\6. 10 socket \x0d\ Test the connected samples according to GB 6 1 1 See table 13 for test pressure and temperature, and the sample should not be leaked or damaged. \x0d\6. 1 1 Determine the contents of lead, tin, cadmium and mercury according to GB 9644. \x0d\6. 12 Test the vinyl chloride monomer content according to GB 46 15. \x0d\7 Inspection Rules \x0d\7. 1 Before leaving the factory, the products must be inspected by the quality inspection department of the manufacturer, with the certificate attached. \x0d\7.2 Batch \x0d\ Pipes of the same specification are produced with the same batch of raw materials, the same formula and process, and the quantity of each batch shall not exceed 100t. If the production quantity is small and the production cycle within 7 days is less than 100t, the production within 7 days is regarded as a batch. \x0d\7.3 factory inspection \x0d\7.3. 1 factory inspection items are longitudinal shrinkage and dichloromethane immersion test specified in 5. 1~5.3 and 5.4, and the ring stress in 5.5 is 42Mpa 20℃ 1h water pressure test. \x0d\7.3.2 5. 1~5.4 The general inspection level and the qualified quality level of 6.5 shall be adopted according to the provisions of table 14, or the inspection shall be conducted according to the provisions of both parties' agreement. \x0d\7.3.3 From the qualified samples, randomly select enough samples for longitudinal shrinkage and dichloromethane immersion test specified in 5.4, and the ring stress in 5.5 is 42 MPa, 42mpa 20℃1h.. \x0d\7.4 Type inspection \x0d\ Type inspection items are all technical requirements. \x0d\ Check items 5. 1~5.3 according to the technical requirements of this standard and the provisions of 7.3.2, and randomly select enough samples from qualified samples to check the performance of items 5.4, 5.5 and 5.6. Usually at least once a year. In any of the following circumstances, type inspection shall be conducted: \x0d\a) trial production, finalization and identification of new products or old products transferred to other factories; \x0d\b) When the structure, materials and technology have changed greatly, which may affect the product performance; \x0d\c) When the product resumes production after a long-term shutdown; \x0d\d) When the factory inspection result differs greatly from the last type inspection result; \x0d\e) When the national quality supervision organization proposes to carry out type inspection. \x0d\7.5 If any of the items 5. 1~5.3 in the judgment rule \x0d\ does not meet the requirements of Table 14, the batch is judged to be unqualified. If one of the physical and mechanical properties fails to meet the index, double samples will be randomly selected for reinspection. If it is still unqualified, the batch is judged to be unqualified. One of the hygiene indicators was judged as an unqualified batch. \x0d\8 Marking, packaging, transportation and storage \x0d\8. 1 Each pipe shall have at least two permanent marks. \x0d\ mark shall at least include the following contents: \x0d\a) name and address of the manufacturer; \x0d\b) The product name shall indicate: (PVC-C) drinking water or (PVC-U) non-drinking water; \x0d\c) Specifications and dimensions: nominal pressure, nominal outside diameter and wall thickness; \x0d\d) This standard number; \x0d\e) Date of production. \x0d\8.2 Packaging \x0d\ shall be carried out according to user's requirements. \x0d\8.3 Transportation \x0d\ pipelines shall not be exposed to the sun, polluted, pressed or damaged during transportation. \x0d\8.4 Pipes stored in \x0d\ should be piled up reasonably, away from heat sources. The stacking height shall not exceed 1.5m, and the flared parts shall be staggered to avoid extrusion deformation. When stored in the open air, it must be covered to prevent exposure.