GB 15558.2-1995 Buried polyethylene (PE) fittings for the supply of gaseous fuels

GB 15558.1-1995 Buried polyethylene (PE) pipes for the supply of gaseous fuels

GB/T 15558.2-2005 Buried polyethylene (PE) piping systems for the supply of gaseous fuels—Part 2:Fittings

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 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 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 2828.2-2008 Sampling procedures for inspection by attributes—Part 2:Sampling plans indexed by limiting quality(LQ)for isolated lot inspection GB/T 2828.3-2008 Sampling procedures for inspection by attributes—Part 3:Skip-lot sampling procedures GB/T 2828.4-2008 Sampling procedures for inspection by attributes—Part 4:Procedures for assessment of declared quality levels GB/T 2828.5-2011 Sampling procedures for inspection by attributes—Part 5:System of sequential sampling plans indexed by acceptance quality limit(AQL)for lot-by-lot inspection GB/T 2828.10-2010 Sampling procedures for inspection by attributes—Part 10:Introduction to the GB/T 2828 series of standards for sampling for inspection by attributes GB/T 2828.11-2008 Sampling procedures for inspection by attributes—Part 11:Procedures for assessment of declared quality levels for small population GB/T 2918-1998 Plastics—Standard atmospheres for conditioning and testing GB/T 2918-2018 Plastics—Standard atmospheres for conditioning and testing 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 6283-1986 Chemical products—Determination of water—Karl fischer method (general method) GB/T 6283-2008 Chemical products—Determination of water Karl·fischer method(general method) GB/T 8806-2008 Plastics piping systems—Plastics components—Determination of dimensions 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 15558.1-1995 Buried polyethylene (PE) pipes for the supply of gaseous fuels GB 15558.1-2003 Buried Polyethylene(PE)piping systems for the supply of gaseous fuels—Part 1:Pipes GB/T 15558.1-2015 Buried polyethylene(PE)piping systems for the supply of gaseous fuels—Part 1:Pipes GB/T 15558.1-2023 Buried polyethylene(PE) piping systems for the supply of gaseous fuels—Part 1:General GB/T 8806-1988 Method for dimension measuring of plastic pipes