*GB 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 spectrophotometric method for the determination of acid-soluble silicon content
*GB/T 223.16-1991 Methods for chemical analysis of iron, steel and alloy The chromotropic acid photometric method for the determination of titanium content
*GB 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 223.27-1994 Methods for chemical analysis of iron,steel and alloy The thiocyanate-butyl acetate extraction spectrophotometric method for the determination of molybdenum content
*GB 223.37-1989 Methods for chemical analysis of iron steel and alloy; The indophenal blue photometric methods for the determination of nitrogen content after distillation separation
*GB/T 223.39-1994 Methods for chemical analysis iron,steel and alloy The sulphochlorophenol S photometric method for the determination of niobium content
*GB 223.54-1987 Methods for chemical analysis of iron,steel and alloy; The flame atomic absorption spectrophotometric method for the determination of nickel content
*GB 223.58-1987 Methods for chemical analysis of iron,steel and alloy; The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content
*GB 223.59-1987 Methods for chemical analysis of iron,steel and alloy; The reduced molybdoantimonyl phosphoric acid photometric method for the determination of phosphorus 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 228-1987
*GB/T 229-1994 Metallic materials-Charpy notch impact test
*GB/T 230-1991 Metallic materials－Rockwell hardness test
*GB/T 231-1984 Metallic materials--Brinell hardness test
*GB/T 246-1997 Metallic materials--Tube--Flattening test
*GB/T 2975-1998 Steel and steel products--Location and preparation of test pieces for mechanical testing
*GB/T 4336-1984 Method for photoelectric emission spectroscopic analysis of carbon steel medium and low alloy steel
*GB/T 5777-1996 Seamless steel pipe and tubing-Methods for ultrsonic testing
*GB/T 7735-1995 Steel tubes--The inspection method on eddy current test
*GB/T 8363-1987 Metallic materials; Drop-weight tear tests of ferritic steels
*GB/T 9445-1999 Qualification and certification for nondestructive testing personnel
*GB/T 9711.1-1997 Petroleum and natural gas industries-Steel pipe for pipelines-Technical deivery conditions-Part 1:Pipes of requirement class A
*GB/T 12606-1999 Steel tubes--The testing method of magnetic flux leakage
*GB/T 13304-1991 Steels－Classification
*GB/T 15574-1995 Steel products classification and definitions
*GB/T 17505-1998 Steel and steel products General technical delivery requirements
*GB/T 17600.1-1998 Steel--Conversion of elongation values--Part 1: Carbon and low alloy steels
*GB/T 19002-1994 Quality systems--Model for quality assurance in production installation and servicing
*SY/T 6423.1-1999 Petreoleum and natural gas industries—Non-destructive testing (NDT) methods of steel tubes for pressure purposes—Radiographic testing of the weld seam of submerged arcwelded steel tubes for the detection of imperfections
*SY/T 6423.3-1999 Petreoleum and natural gas industries—Non-destructive testing (NDT) methods of steel tubes for pressure purposes—Ultrasonic testing of the weld seam of submerged arcwelded steel tubes for the detection of longitudinal and/or transverse imperfections
*SY/T 6423.4-1999 Petreoleum and natural gas industries—Non-destructive testing (NDT) methods of steel tubes for pressure purposes—Ultrasonic testing of the area adjacent to the weld seam oof welded steel tubs for the detection of laminar imperfections
*SY/T 6423.5-1999 Petreoleum and natural gas industries—Non-destructive testing (NDT) methods of steel tubes for pressure purposes—Ultrasonic testing of strips/plates used in the manufacture of welded tubesfor the detection of laminar imperfections
*SY/T 6423.6-1999 Petreoleum and natural gas industries—Non-destructive testing (NDT) methods of steel tubes for pressure purposes—Ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of laminar imperfections
*SY/T 6423.6-1999 Petreoleum and natural gas industries—Non-destructive testing (NDT) methods of steel tubes for pressure purposes—Ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of laminar imperfections