ASTM A53-Pipe steel, black and hot-dipped, zinc-coated, welded seamless

ASTM A312-Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes

BS1387-Screwed and socketed steel tubes and tubulars for plain end steel tubes suitable for welding or screwing to BS 21 pipe threads

DIN 2391 Seamless precision steel tubes sizes

DIN 2440-Steel tubes, medium weight suitable for screwing

DIN 2448-Plain end seamless steel tubes