*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 223.58-1987 Methods for chemical analysis of iron, steel and alloy - The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content
*GB/T 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 700-1988 Carbon structural steels
*GB/T 2651-1989 Method of tensile test for welded joint
*GB/T 3323-1987 Methods for radiographic inspection and classification of radiographs for fusion welded butt joints in steel
*GB/T 4336-1984 Method for photoelectric emission spectroscopic analysis of carbon steel medium and low alloy steel
*GB/T 6397-1986 Metallic materials--Test pieces for tensile testing
*GB/T 9711.1-1997 Petroleum and natural gas industries-Steel pipe for pipelines-Technical deivery conditions-Part 1:Pipes of requirement class A
*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