CJ/T 182-2003 Buried polyethylene(PE)composite pipes with porous steel strip for the supply of gaseous fuels

GB 15558.1-1995 Buried polyethylene (PE) pipes for the supply of gaseous fuels 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 1034-1998 Plastics—Determination of water absorption GB/T 1034-2008 Plastics—Determination of water absorption GB/T 1842-1999 Test method for environmental stress-cracking of polyethylene plastics GB/T 1842-2008 Plastics—Test method for environmental stress-cracking of polyethylene GB/T 2918-1998 Plastics—Standard atmospheres for conditioning and testing GB/T 2918-2018 Plastics—Standard atmospheres for conditioning and testing GB/T 3524-1992 Hot-rolled cardon and low alloy structural steel strips GB/T 3524-2005 Hot-rolled carbon and low alloy structural steel strips GB/T 3524-2015 Hot-rolled carbon and low alloy structural steel strips GB/T 3681-2000 Plastics—Test method of exposure to weathering GB/T 3681-2011 Plastics—Methods of exposure to direct weathering,to weathering using glass-filtered daylight,and to intensified weathering by daylight using Fresnel mirrors GB/T 3681.1-2021 Plastics—Methods of exposure to solar radiation—Part 1:General guidance GB/T 3681.2-2021 Plastics—Methods of exposure to solar radiation—Part 2:Direct weathering and exposure behind window glass 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 6671-2001 Thermoplastics pipes-Determination of longitudinal reversion GB/T 8806-2008 Plastics piping systems—Plastics components—Determination of dimensions GB/T 9647-2003 Thermoplastics pipes—Determination of ring stiffness GB/T 9647-2015 Thermoplastics pipes—Determination of ring stiffness GB/T 13021-1991 Determination for the carbon black content of polyethylene pipes and fittings by calcination and pyrolysis GB/T 13021-2023 Polyolefin pipes and fittings—Determination of carbon black content—Test method of alcination and pyrolysis GB/T 15482-1995 Single sampling procedures and tables for product quality audit of small population by attributes 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 17391-1998 Test method for thermal stability of polyethylene pipes and fittings YB/T 5059-2013 Low carbon steel cold rolled steel sheet GB/T 8805-1988 Determination of deflection for rigid plastic pipes GB/T 8806-1988 Method for dimension measuring of plastic pipes YB/T 5059-2005 Cold-rolled low carbon steel strips