... pipeAPI 5L Line Pipe Size: 4-1/2"~20" Steel grade: J55, K55, N80, L80 Thread Type: ... TPCO pipe is pipe that is cast instead or being and not welded, which makes it stronger ... ordinary welded pipe.1. Size: 4-1/2"~20"Steel grade: J55, K55, N80, L80, P110, Q125Thread ... /CPackingae:Bulk,bundle or seaworthy wooden case.With or without edge protector,steel hoop and seals.seamless steel tube seamless pipe ...