GB 18248-2000 Seamless steel tubes for gas cylinder

GB/T 18248-2008 Seamless steel tubes for gas cylinder

GB/T 222-1984 Method of sampling steel for determination of chemical composition and permissible variations for product analysis 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 223.11-1991 Methods for chemical analysis of iron, steel and alloy The ammonium persulfate oxidation volumetric method for the determination of chromium content GB/T 223.12-1991 Methods for chemical analysis of iron, steel and alloy—The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content GB/T 223.14-1989 GB/T 223.19-1989 Methods for chemical analysis of iron, steel and alloy The neocuproine-chloroform extraction photometric method for the determination of copper content GB/T 223.23-1994 Methods for chemical analysis of iron, steel and alloy—The dimethylglyoxime spectrophotometric method for the determination of nickel content GB/T 223.26-1989 Methods for chemical analysis of iron, steel and alloy The thiocyanate direct photometric method for the determination of molybdenum content GB/T 223.62-1988 Methods for chemical analysis of iron,steel and alloy—The butyl acetate extraction photometric method for the determination of phosphorus content GB/T 223.63-1988 Methods for chemical analysis of iron,steel and alloy—The sodium(potassium)periodate photometric method for the determination of manganese content GB/T 223.68-1997 Methods for chemical analysis of iron,steel and alloy The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content GB/T 223.69-1997 Methods for chemical analysis of iron,steel and alloy The gas- volumetric method after combustion in the pipe furnace for the determination of carbon content GB/T 226-1991 Etch test for macrostructure and defect of steels GB/T 228-1987 GB/T 229-1994 Metallic materials—Charpy notch impact test GB/T 241-1990 Metal tubes—Hydrostatic pressure testing GB/T 1979-1980 GB/T 2102-1988 Acceptance, packing, marking, and certification of pipe GB/T 4336-1984 GB/T 5777-1996 Seamless steel pipe and tubing—Methods for ultrasonic testing GB/T 7735-1995 Steel tubes—The inspection method on eddy current test GB/T 10561-1989 Steel—Determination of content of non-metallic inclusion—Micrographic method using standard diagrams GB/T 12606-1999 Steel tubes—The testing method of magnetic flux leakage GB/T 17395-1998 Dimensions、shapes、masses and tolerances of seamless steel tubes GB/T 17505-1998 Steel and steel products General technical delivery requirements YB/T 5137-1998 Round blank of seamless steel tube for high pressure

JIS G 3429:1988