GB/T 41048-2021 Technical requirements for plastics inspection chamber and manhole for urban drainage

GB/T 18992.2-2003 Crosslinked polyethylene(PE-X) piping systems for hot and cold water installations—Part 2:Pipes GB/T 19472.2-2017 Polyethylene structure-wall piping systems for underground usage—Part 2:Polyethylene spirally enwound structure-wall pipes GB/T 1033.1-2008 Plastics—Methods for determining the density of non-cellular plastics—Part 1:Immersion method,liquid pyknometer method and titration method GB/T 2918-1998 Plastics—Standard atmospheres for conditioning and testing GB/T 2918-2018 Plastics—Standard atmospheres for conditioning and testing GB/T 3682.1-2018 Plastics—Determination of the melt mass-flow rate(MFR)and melt volume-flow rate(MVR)of thermoplastics—Part 1:Standard method GB/T 6111-2003 Thermoplastics pipes for the conveyance of fluids-Resistance to internal pressure—Test method GB/T 6111-2018 Thermoplastics piping systems for the conveyance of fluids—Determination of the resistance to internal pressure GB/T 8802-2001 Thermoplastics pipes and fitting-Determination of vicat softening temperature GB/T 8806-2008 Plastics piping systems—Plastics components—Determination of dimensions GB/T 9341-2000 Plastics—Determination of flexural properties GB/T 9341-2008 Plastics—Determination of flexural properties GB/T 18173.3-2002 Polymer water—Proof materials—Part 3—Hydrophilic expasion rubber GB/T 18173.3-2014 Polymer water-proof materials—Part 3:Hydrophilic expasion rubber GB/T 18477.3-2009 Unplasticized polyvinyl chloride (PVC-U) structure wall pipeline system for underground soil waste and drainage—Part 3:Bilayer and hollow-wall construction with axial hollow pipes GB/T 18477.3-2019 Unplasticized polyvinyl chloride(PVC-U)structure wall pipeline system for underground soil waste and drainage—Part 3:Axial hollow-wall construction pipes GB/T 19278-2003 General terms and their definitions of thermoplastic pipes, fittings and valves GB/T 19278-2018 General terms and their definitions of thermoplastic pipes,fittings and valves GB/T 19466.6-2009 Plastics—Differential scanning calorimetry(DSC)—Part 6:Determination of oxidation induction time(isothermal OIT)and oxidation induction temperature(dynamic OIT) GB/T 20221-2006 Unplasticized poly(vinyl chloride)(PVC-U)pipes for non-pressure buried drainage and sewerage systems GB/T 20221-2023 Unplasticized poly(vinyl chloride) (PVC-U) pipes for non-pressure buried drainage and sewerage systems GB/T 21873-2008 Rubber seals—Joint rings for water supply,drainage and sewerage pipelines—Specification for materials GB/T 23858-2009 Manhole cover GB/T 8806-1988 Method for dimension measuring of plastic pipes GB/T 21873-2025 Rubber seals—Joint rings for water supply,drainage and sewerage pipelines—Specification for materials