Hydropower spiral steel pipe spiral pipe Spiral welded pipe: low-carbon carbon structural steel or low alloy steel strip according to the angle of the spiral line (called molding angle) rolled into a tube, and then the tube seam welded system into, it can be a narrow strip production of large diameter steel pipe. Spiral welded pipe for oil and gas pipelines, its specifications OD * wall thickness. Spiral welded side welding and double-sided welding, the pipe should ensure that the hydrostatic test, the weld tensile strength and cold bending performance to meet the requirements. Integrity is life. Customer satisfaction is our eternal pursuit. Company promises: equal quality, lowest price, homegrown, and ensure credibility. Sincerely look forward to cooperation with friends from all walks of life. 
 The Tianhui Hebei Steel Pipe Manufacturing Co., Ltd. All using SY/T5037-2000 GB/T9711.1-1997 standards and APISpec5L standard production φ219-φ2420, Q235, Q345, 10 # steel, 20 # steel, 16Mn, L245, L290, of L360 , X42-X70 steel grade and wall thickness of spiral submerged arc welded pipe. The products are widely used in natural gas, petroleum, chemicals, electricity, heating, drainage, steam heating, hydropower pressure steel pipe, thermal power, water and other long-distance pipelines and piling, bridges, steel structures and other engineering fields. http://www.naimoguanjian.com pump the tube http://www.thgangguan.com spiral steel pipe http://www.hbthgg.com spiral Steel Plant