GB 33146-2025 Valves for liquefied dimethyl ether cylinders

GB/T 33146-2016 Valves for liquefied dimethyl ether cylinders

GB/T 197-2003 General purpose metric screw threads—Tolerances GB/T 197-2018 General purpose metric screw threads—Tolerances 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 1184-1996 Geometrical tolerancing—Geometrical tolerance for features without individual tolerance indications GB/T 1804-2000 General tolerances for linear and angular dimensions without individual tolerance indications GB/T 3934-2003 Specification of gauges for general purpose screw threads GB/T 3934-2025 Specification of gauges for general purpose screw threads GB/T 5121.1-1996 Copper and copper alloys—Determination of copper content GB/T 5121.1-2008 Methods for chemical analysis of copper and copper alloys—Part 1:Determination of copper content GB/T 5121.3-1996 Copper and copper alloys—Determination of lead content GB/T 5121.3-2008 Methods for chemical analysis of copper and copper alloys—Part 3:Determination of lead content GB/T 5121.9-1996 Copper and copper alloys—Determination of iron content GB/T 5121.9-2008 Methods for chemical analysis of copper and copper alloys—Part 9:Determination of iron content GB/T 5231-2001 Wrought copper and copper alloys chemical composition limits and forms of wrought products GB/T 5231-2012 Designation and chemical composition of wrought copper and copper alloys GB/T 5231-2022 Designation and chemical composition of wrought copper and copper alloys GB 7512-1998 Valves for liquefied petroleum gas cylinders GB/T 7512-2006 Valves for liquefied petroleum gas cylinders GB/T 7512-2017 Valves for liquefied petroleum gas cylinders GB 7512-2023 Valves for liquefied petroleum gas cylinders GB 8335-1998 Special threads for gas cylinders GB/T 8335-2011 Special threads for gas cylinders GB/T 8336-1998 Special thread gauges for gas cylinders GB/T 8336-2011 Special thread gauges for gas cylinders GB/T 10567.2-1997 Wrought copper and copper alloys—Detection of residual stress—Ammonia test GB/T 10567.2-2007 Wrought copper and copper alloys—Detection of residual stress—Ammonia test GB/T 13005-1991 Terminology of gas cylinders GB/T 13005-2011 Terminology of gas cylinders GB 15382-1994 General technique specifications for cylinder valves GB/T 15382-2009 General specifications of gas cylinder valves GB/T 15382-2021 General specifications of gas cylinder valves GB/T 25035-2010 Dimethyl ether for city gas GB/T 45439-2025 Technical specification for the application of traceability two-dimensional code on fuel gas cylinders and fuel gas cylinder valves YS/T 482-2005 Methods for analysis of copper and copper alloys—The atomic emission spectrometry YS/T 482-2022 Copper and Copper Alloy Analysis Methods: Spark Discharge Atomic Emission Spectrometry YS/T 483-2005 Methods for analysis of copper and copper alloys—X-Ray fluorescence spectrometric(wavelength dispersive) YS/T 483-2022 Copper and Copper Alloy Analysis Method: X-Ray Fluorescence Spectroscopy (Wavelength Dispersive Type)