GB/T 13295-2003 Ductile iron pipes,fittings and accessories for water or gas applications

GB 13294-1991 GB 13295-1991

GB/T 13295-2008 Ductile iron pipes,fittings and accessories for water or gas applications

ISO 4633 ISO 6447 ISO 7005-2 ISO 7483 ISO 8179-2 ISO 8180 GB/T 90.1-2002 Fasteners—Acceptance inspection GB/T 90.1-2023 Fasteners—Acceptance inspection GB/T 90.2-2002 Fasteners—Marking and packaging GB/T 90.3-2010 Fasteners—Quality assurance system GB/T 197-2003 General purpose metric screw threads—Tolerances GB/T 197-2018 General purpose metric screw threads—Tolerances GB/T 231.1-2002 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 231.1-2009 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 231.1-2018 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 231.2-2002 Metallic Brinell hardness test—Part 2:Verification and calibration of hardness testers GB/T 231.2-2012 Metallic materials—Brinell hardness test—Part 2:Verification and calibration of testing machines GB/T 231.2-2022 Metallic materials—Brinell hardness test—Part 2:Verification and calibration of testing machines GB/T 231.3-2002 Metallic Brinell hardness test—Part 3:Calibration of hardness reference blocks GB/T 231.3-2012 Metallic materials—Brinell hardness test—Part 3:Calibration of reference blocks GB/T 231.3-2022 Metallic materials—Brinell hardness test—Part 3:Calibration of reference blocks GB/T 231.4-2009 Metallic materials—Brinell hardness test—Part 4:Tables of hardness values GB/T 3672.1-2002 Rubber—Tolerances of products—Part 1:Dimensional tolerances GB/T 3672.2-2002 Rubber—Tolerances of products—Part 2:Geometrical tolerances GB/T 5721-1993 General rules of identification, packaging, transportation and storage for rubber sealing products GB/T 6414-1999 Castings—System of dimensional tolerances and machining allowances GB/T 6414-2017 Castings—Dimensional tolerances and geometrical tolerances and machining allowances GB/T 17219-1998 Standard for safety evaluation of equipment and protective materials in drinking water system GB/T 17456-1998 Ductile iron pipes—External zinc-spray coating GB/T 17456.1-2009 Ductile iron pipes—External zinc-based coating—Part 1:Metallic zinc with finishing layer GB/T 17456.2-2010 Ductile iron pipes—External zinc coating—Part 2:Zinc rich paint with finishing layer GB/T 17457-1998 Ductile iron pipes—Centrifugal cement mortar lining—General requirements GB/T 17457-2009 Ductile iron pipes and fittings—Cement mortar lining GB/T 17457-2019 Ductile iron pipes and fittings—Cement mortar lining GB/T 17459-1998 Ductile iron pipes—Bitumen coating GB/T 17671-1999 Method of testing cements—Determination of strength GB/T 17671-2021 Test method of cement mortar strength(ISO method) GB/T 3672.1-2025 Tolerances for rubber products—Part 1:Dimensional tolerances GB/T 3672.2-2025 Tolerances for rubber products—Part 2:Geometrical tolerances GB/T 17219-2025 Hygienic safety evaluation of distribution equipment,protective materials and treatment materials in drinking water system GB/T 17456.1-2025 Ductile iron pipes,fittings and accessories—External zinc-based coating—Part 1: Metallic zinc and zinc alloy with finishing layer GB/T 17456.2-2025 Ductile iron pipes,fittings and accessories—External zinc-based coating—Part 2:Zinc rich paint with finishing layer

ISO 2531:1998