ASTM A860 A860M Standard Specification for Wrought High-Strength Low-Alloy Steel Butt-Welding Fittings.
ASTM A420 Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
ASTM A403 A403M Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings.
ASTM A234 A234M Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service.
ASTM A312 A312M Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
API 5L Specification for Line Pipe.
ASTM A106 A106M Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service.
ASTM A53 A53M Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless.
DIN 2441-78 STEEL TUBES HEAVY WEIGHT FOR SUITABLE FOR SCREWING
DIN 2440 STEEL TUBES MEDIUM WEIGHT SUITABLE FOR SCREWING
DIN 1629 Seamless Circular Unalloyed Steel Tubes Subject to special requirements.
GOST 19281 Rolled Steel With Enhanced Strength.
GOST 8732-78 Seamless hot-deformed steel tubes. Range.
GOST-1050 Sized Bars Made of High-Quality Structural Carbon Steel With a Special Surface Finish.
JIS G3460 Steel pipes for low temperature service.
JIS G3459 Stainless steel pipes.
JIS G3458 Alloy Steel Pipes.
JIS G3457 Arc welded carbon steel pipes.
JIS G3456 Carbon steel pipes for high temperature service.
JIS G3455 Carbon steel pipes for high pressure service.
JIS G3454 Carbon steel pipes for pressure service.
JIS G3452 Carbon steel pipes for ordinary piping.
BS EN 10253-4 Butt-welding pipe fittings Part 4:Wrought austenitic and austenitic-ferritic （duplex）stainless steels with specific inspection requirements
BS EN10253-3 Butt-welding pipe fittings Part 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements
BS EN 10253-2 Butt-welding pipe fittings. part 2: Non alloy ferritic alloy steels with specific inspection requirements
BS EN 10253-1 Butt-Welding Pipe Fittings Part 1: Wrought Carbon Steel for General Use and Without Specific Inspection Requireme
BS EN 10255 Non-alloy steel tubes suitable for welding and threading Technical delivery conditions
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