GB/T 18997.1-2003 Polyethylene/Aluminum/Polyethylene composite pressure pipe—Part 1:PE/AL/PE pipe overlap-welded by aluminum pipe

GB/T 18997.2-2003 Polyethylene/Aluminum/Polyethylene composite pressure pipe—Part 2:PE/AL/PE pipe butt-welded by aluminum pipe

GB/T 18997.1-2020 Plastic/aluminum/plastic composite pressure pipes—Part 1:Composite pipes overlap-welded by aluminum pipe

GB/T 1033-1986 Test method for density and relative density of plastics GB/T 1040-1992 GB/T 2035-1996 Terms and definitions for plastics GB/T 2828-1987 GB/T 2918-1998 Plastics—Standard atmospheres for conditioning and testing GB/T 3682-2000 Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics GB/T 4608-1984 Test for melting point of semicrystalline polymers Optical method GB/T 13021-1991 Determination for the carbon black content of polyethylene pipes and fittings by calcination and pyrolysis GB/T 13663-2000 Polyethylene pipes for water supply GB 15558.1-1995 Buried polyethylene (PE) pipes for the supply of gaseous fuels GB/T 17391-1998 Test method for thermal stability of polyethylene pipes and fittings GB/T 18252-2000 Plastics piping and ducting systems—Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation GB/T 18474-2001 Pipes and fittings made of crosslinked polyethylene(PE-X)—Estimation of the degree of crosslinking by determination of the gel content GB/T 18476-2001 Polyolefin pipes for the conveyance of fluids—Determination of resistance to crack propagation-Test method for slow crack growth on notched pipes(notch test) GB/T 18997.2-2003 Polyethylene/Aluminum/Polyethylene composite pressure pipe—Part 2:PE/AL/PE pipe butt-welded by aluminum pipe ISO 1167 GB/T 228-2002 Metallic materials—Tensile testing at ambient temperature GB/T 228.1-2010 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 228.1-2021 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 228.2-2015 Metallic materials—Tensile testing—Part 2:Method of test at elevated temperature GB/T 228.3-2019 Metallic materials—Tensile testing—Part 3:Method of test at low temperature GB/T 228.4-2019 Metallic materials—Tensile testing—Part 4:Method of test in liquid helium GB/T 15560-1995 Standard test method for short-time hydraulic failure and resistance to constant internal pressure of the plastics pipes for the transport of fluids GB/T 17219-1998 Standard for safety evaluation of equipment and protective materials in drinking water system GB/T 8806-1988 Method for dimension measuring of plastic pipes GB/T 17219-2025 Hygienic safety evaluation of distribution equipment,protective materials and treatment materials in drinking water system