YS/T 451-2012 Copper tubes with plastic-lag

YS/T 451-2002 Poly-lag copper tube

GB/T 244-1997 Metallic materials—Tube—Bend test GB/T 244-2008 Metallic materials-tube—Bend test GB/T 244-2020 Metallic materials—Tube—Bend test method GB/T 1033-1986 Test method for density and relative density of plastics 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 1033.2-2010 Plastics—Methods for determining the density of non-cellular plastics—Part 2:Density gradient column method GB/T 1033.3-2010 Plastics—Methods for determining the density of non-cellular plastics—Part 3:Gas pyknometer method GB/T 1040.1-2006 Plastics—Determination of tensile properties—Part 1:General principles GB/T 1040.1-2018 Plastics—Determination of tensile properties—Part 1:General principles GB/T 1040.2-2006 Plastics—Determination of tensile properties—Part 2:Test conditions for moulding and extrusion plastics GB/T 1040.2-2022 Plastics—Determination of tensile properties—Part 2:Test conditions for moulding and extrusion plastics GB/T 1633-2000 Plastics—Thermoplastic materials—Determination of Vicat softening temperature(VST) GB/T 2406-1993 Plastics—Determination of flammability by oxygen index GB/T 2406.1-2008 Plastics—Determination of burning behaviour by oxygen index—Part 1:Guidance GB/T 2406.2-2009 Plastics—Determination of burning behaviour by oxygen index—Part 2:Ambient-temperature test GB/T 2406.3-2022 Plastics—Determination of burning behaviour by oxygen index—Part 3:Elevated-temperature test GB/T 2828.1-2003 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 2828.1-2012 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 3682-2000 Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics 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 3682.2-2018 Plastics—Determination of the melt mass-flow rate(MFR)and melt volume-flow rate(MVR)of thermoplastics—Part 2:Method for materials sensitive to time-temperature history and/or moisture GB/T 5470-1985 Test method for brittleness temperature of plastics by impact GB/T 5470-2008 Plastics—Determination of the brittleness temperature by impact GB/T 8888-2003 Wrought heavy non-ferrous metal products-Packing,marking,transporting and storing GB/T 8888-2014 Wrough heavy non-ferrous metal products-packing,marking,transportation,storing and cetificate of quality GB/T 18033-2000 Seamless copper tubes for water and gas GB/T 18033-2007 Seamless copper tubes for water and gas GB/T 18033-2017 Seamless copper tubes for water and gas GB/T 1040.1-2025 Plastics—Determination of tensile properties—Part 1:General principles GB/T 2406.4-2025 Plastics—Determination of burning behaviour by oxygen index—Part 4:High gas velocity test GB/T 1633-2025 Plastics—Thermoplastic materials—Determination of Vicat softerning temperature(VST)