... steel pipes 2 material carbon steel stainless steel alloy steel 3 size 1/2"-24" 4 MIN order 100 pieces Steel pipeTypes: seamless steel pipes ,welded pipes ... (ERW/EFW/SSAW/LSAW)Material: Carbon steel ... ,309,310,316,Alloy steel : ASTM A 335 P1,5,7,9,11,12,22,91 carbon steel pipes