... ,X52,X60,X70,X80,etc Hebei Haiqianwei Steel Pipe Co.,Ltd, uses the most advanced technology of ... JCOE LSAW steel pipe manufacture in the world ... wide, specialized in producing heavy calibre LSAW steel pipe. The product line adopts PID automatic ... 12.5m,steel grade could be simple carbon steel, special type steel and low alloy steel ,the steel grade could ...