GB/T 19158-2003 Steel cylinders for the storage of compressed natural gas

GB/T 19158-2025 Fully wrapped carbon-fibre reinforced aluminum lined gas cylinders used on containers or skids for transportation or skids for fueling station of compressed hydrogen

GB/T 222-1984 Method of sampling steel for determination of chemical composition and permissible variations for product analysis GB/T 223.1-1981 GB/T 223.2-1981 GB/T 223.3-1988 Methods for chemical analysis of iron, steel and alloy—The diantipyryl methane phosphomolybdate gravimetric method for the determination of phosphorus content GB/T 223.4-1988 Methods for chemical analysis of iron, steel and alloy The volumetric method for determination of manganese content by ammonium nitrate oxidation GB/T 223.5-1997 Methods for chemical analysis of iron,steel and alloy—The reduced molybdosilicate spectro photometric method for the determination of acid-soluble silicon content GB/T 223.6-1994 Methods for chemical analysis of iron, steel and alloy—The neutralization titrimetric method for the determination of boron content GB/T 224-1987 Determination of depth of decarburization of steel GB/T 226-1991 Etch test for macrostructure and defect of steels GB/T 228-2002 Metallic materials—Tensile testing at ambient temperature GB/T 229-1994 Metallic materials—Charpy notch impact test GB/T 230-1991 GB/T 231.1-2002 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 231.2-2002 Metallic Brinell hardness test—Part 2:Verification and calibration of hardness testers GB/T 231.3-2002 Metallic Brinell hardness test—Part 3:Calibration of hardness reference blocks GB/T 232-1999 Metallic materials—Bend test GB/T 1172-1999 Conversion of hardness and strength for ferrous metal GB/T 1979-2001 Standard diagrams for macrostructure and defect of structural steels GB/T 3077-1999 Alloy structure steels GB/T 5777-1996 Seamless steel pipe and tubing—Methods for ultrasonic testing GB 7144-1999 Colored cylinder mark for gases GB 8335-1998 Special threads for gas cylinders GB/T 8336-1998 Special thread gauges for gas cylinders GB/T 9251-1997 Method for hydraulic test of gas cylinders GB/T 9252-2001 Method for cycling test of gas cylinders GB/T 12137-2002 Method for leakage test of gas cylinders GB/T 12606-1999 Steel tubes—The testing method of magnetic flux leakage GB/T 13298-1991 Metal—Inspection method of microstructure GB/T 13299-1991 Steel—Determination of microstructure GB/T 13440-1992 Method for flattening test of seamless gas cylinders GB 15385-1994 Method for hydraulic burst test of gas cylinders GB 18047-2000 Compressed natural gas as vehicle fuel GB 18248-2000 Seamless steel tubes for gas cylinder JB 47