GB/T l047-2005 Definition and Selection of Pipeline Components DN (Nominal Size)
GB/T l048 2005 Definition and selection of PN (nominal pressure) piping components
GB/T l2385—2008 Test method for gasket sealing performance of pipe flanges
GB/T l2621 2008 Gasket flange flange stress relaxation test method
GB/T l2622 2008 Test method for compression ratio and rebound rate of gaskets for pipe flanges
GB/T 20671.1—2006 Non-metallic gasket material classification system and test method Part 1: Non-metallic gasket material classification system
GB/T 20671.2—2006 Non-metallic gasket material classification system and test method Part 2: Test method for rebound rate of gasket material compression ratio
GB/T 20671.3—2006 Non-metallic gasket material classification system and test methods. Part 3: Test method for gasket material liquid resistance
GB/T 20671.4—2006 Non-metallic gasket material classification system and test method Part 4: Test method for gasket material sealing performance
GB/T 20671.5—2006 Non-metallic gasket material classification system and test methods. Part 5: Test method for creep relaxation rate of gasket materials
GB/T 20671.6-2006 Classification system and test methods for non-metallic gasket materials Part 6: Test methods for adhesion of gasket materials to metal surfaces
GB/T 20671.7—2006 Classification system and test methods for non-metallic gasket materials Part 7: Test method for tensile strength of non-metallic gasket materials
GB/T 20671.8—2006 Non-metallic gasket material classification system and test methods. Part 8: Test method for the flexibility of non-metallic gasket materials
GB/T 20671.9—2006 Non-metallic gasket material classification system and test method Part 9: Test method for durability of cement material for cork gasket materials
GB/T 20671.10-2006 Non-metallic gasket material classification system and test method. Part 10: Method for determining the thermal conductivity of gasket materials
GB/T 20671.11—2006 Non-metallic gasket material classification system and test method. Part 11: Determination of anti-mold property of synthetic polymeric materials
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