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 the www.naimoguanjian.com American Petroleum Institute, also known as line pipe; which is divided into PSL1 and PSL2 two levels), SY/T5040-92 (pile with spiral seam submerged arc welded steel) coil material: Q235A, Q23b, 0Cr13 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb. Q345 L245 L290 X42 X46 X70 X80 X95??? spiral welded spiral welded pipe: the low-carbon carbon structural steel or low alloy steel strip according to the angle of the helix (called forming angle) rolled into a tube, and then the tube welded together made, it can use a narrow strip to the 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. The company is committed to: the same 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. Spiral Pipe Network persist in grasping the market, and internal management, quality and efficiency of development and achieved good economic and social benefits, with strong financial strength, advanced management experience, excellent sales service: strict quality stock management system and science and the overall marketing tool, hand in hand with you and develop together. ??? Spiral steel pipe network operators a fair, objective, scientific, pragmatic, and the principle of integrity. Management in order to standardize their operations and courteous. Honesty, courage to forge ahead in unity and future of diligent hard work, to seize the great economic development trends and developing the western region. Excellent opportunity to revitalize the economy in the Northeast is actively strengthen exchanges with their peers, GUANG friends from all walks of life, the times to create the enterprise greater glory for the country, to make a contribution to the prosperity and development of seamless steel pipe industry.