Carbon steel pipes include seamless steel pipe and welded steel pipe. ( ERW steel pipe, LSAW steel pipe, SSAW steel pipe) Materials : ASTM A106 GR.B, 20# , API 5L X42, X52, X56, X60, X65, X70 API 5CT. Length: 6-12M Email: dspipeindustry ( at) gmail ( dot) com Contact : Karso Lee