1.ASTM A53/BS 6323 carbon steel seamless pipe 2.OD: HRS 2"-30", CDS 0.875"-18" 3.WT: HRS 0.250"-4" CDS 0.035"-0.875"

ASTM A 53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

GB/T8162 Seamless Steel Tubes for Structural Purposes

JIS G3444 Carbon steel tubes for general structural purposes

JIS G3445 Carbon steel tubes for machine structural purposes

DIN 2448 SEAMLESS STEEL PIPES AND TUBES

BS 6323 SEAMLESS AND WELDED STEEL TUBES FOR AUTOMOBILE MECHANICAL AND GENERAL ENGINEER PURPOSE

EN 10210 Seamless structural steel pipes

EN 10297 Seamless circular steel tubes for mechanical and general engineering purposes

schedule 40 steel pipe