Large Diameter Spiral Steel Pipes For Bridges

Product Description  Spiral Steel Pipes For Bridges is a U.S. petroleum standard for piping. Pipeline pipes are used to transport oil, steam and water from underground to the oil and gas industry. Pipeline pipe includes seamless pipe and Welded Steel Pipe, pipe end has flat end, thread end and socket end; The connection mode includes end welding, coupling connection, socket connection and so on. Cost factors, welded pipe in the pipeline field has dominated, limited its...