1.Application:Petrol,gas,water pipe;construction,chemical fertilizer pipe,etc. 2.Market:Southeast,etc. Our company ... is a professional manufacturer specializing in producing ERW pipe. We have advanced production equipment and skilled operators. ... coupling, necking, punching, etc.5.Welded Line Type: ERW6.Usage Industry:Petroleum, gas, water pipe, construction, chimney pot, chemical fertilizer ...