Hebei Yuancheng Industrial Co., Ltd is the manufacturer and operator of Spiral Steel<br /> Pipe,the OD from 219mm to 2432mm with thc 5mm-32mm . All pipes are produced ,according to<br /> SY/T5037-2000,GB/T9711, APISpec5L standards. The material adopts Q235, Q345, 10#, 20#,<br /> 16mn, L245, L290, L360,X42-X70.