GB/T 23257-2017 Polyethylene coating for buried steel pipeline

GB/T 23257-2009 Polyethylene coating for buried steel pipeline

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 1408.1-1999 Methods of test for electric strength of solid insulating materials-Tests at power frequencies GB/T 1408.1-2006 Electrical strength of insulating materials—Test methods—Part 1:Tests at power frequencies GB/T 1408.1-2016 Insulating materials—Test methods for electric strength—Part 1:Test at power frequencies GB/T 1410-2006 Methods of test for volume resistivity and surface resistivity of solid electrical insulating materials GB/T 1633-2000 Plastics—Thermoplastic materials—Determination of Vicat softening temperature(VST) GB/T 1725-2007 Paints,varnishes and plastics—Determination of non-volatile-matter content 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 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 4472-1984 General rule for determination of density and relative density for chemical products GB/T 4472-2011 Detemination of density and relative density for chemical products 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 6514-1995 Safety code for painting—Safety、 ventilation and air clean-up for painting process GB 6514-2008 Safety code for painting—Safety、ventilation and air clean-up for painting process GB 6514-2023 Safety code of practice for coating—Safety and ventilation for coating process GB/T 6554-2003 Resin based reactive compounds used for electrical insulation—Part 2:Methods of test—Methods for coating pourders for electrical purposes GB/T 7124-1986 The method for determination of strength properties of adhesive in shear by tension loading(Metal to metal) GB/T 7124-2008 Adhesives—Determination of tensile lap-shear strength of rigid-to-rigid bonded assemblies GB 7692-1999 Safety code for painting—Safety, ventilation and air clean-up for pretreatment process of painting GB 7692-2012 Safety code for painting—Safety、ventilation and air clean-up for pretreatment process of painting GB/T 8923.1-2011 Preparation of steel substrates before application of paints and related products—Visual assessment of surface cleanliness—Part 1:Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings 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 15332-1994 Determination of the softening point of hot-melt adhesives—Ball and ring method GB/T 18570.3-2005 Preparation of steel substrates before application of paints and related products—Tests for the assessment of surface cleanliness—Part 3:Assessment of dust on steel surface prepared for painting(pressure-sensitive tape method) GB/T 18570.9-2005 Preparation of steel substrates before application of paints and related products—Tests for the assessment of surface cleanliness—Part 9:Field method for the conductometric determination of water-soluble salts GB 50369-2014 Code for construction and acceptance of oil and gas long-distance transmission pipeline engineering GB/T 50087-2013 Specifications for the design of noise control system in industrial enterprises GB/T 1633-2025 Plastics—Thermoplastic materials—Determination of Vicat softerning temperature(VST) GB/T 18570.9-2025 Preparation of steel substrates before application of paints and related products—Tests for the assessment of surface cleanliness—Part 9:Field method for the conductometric determination of water-soluble salts