Tianjin TEDA Hongye Steel Co., Ltd.: Spiral material: Q235, Q235A-D, Q195, Q195A-D, Q215, Q215-D, Q345A-E is now a common standard spiral pipe is generally divided into: SY/T5037-2000 ( department standard, also known as general fluid pipes with spiral submerged arc welded pipe), GB/T9711.1-1997 (GB, also known as oil and gas industry technical delivery conditions for steel transmission Part: A grade steel (to currently demanding There GB/T9711.2 B grade steel)), API-5L (American Petroleum Institute, also known as line pipe; PSL1 and PSL2 which is divided into two levels), SY/T5040-92 (pile with spiral submerged arc welded pipe). 
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 Spiral Pipe characteristics: Longitudinal production process is simple, high efficiency, material production into a larger diameter pipe, you can also use the same width of the billet production of different pipe diameters. However, with the same length of straight pipe seam, compared weld length of 30 to 100%, and lower production rate. Therefore, most of the use of smaller diameter straight seam welding pipe, large diameter spiral welded pipe are mostly used. 
 Spiral Pipe Uses: spiral steel pipes are mainly used in water engineering, petrochemical industry, chemical industry, power industry, agriculture, irrigation, urban construction, the development of China's 20 key products. Used for liquid delivery: water supply, drainage. Used for gas transportation: gas, steam, liquefied petroleum gas. For structural use: for piling pipes for bridges; piers, roads, pipes and other building structures. 
 Spiral Pipe and standard classification: pressure fluid transport, with spiral submerged arc welded pipe SY5036-83, mainly used for transporting oil, natural gas pipelines; pressure fluid transport high-frequency welded steel pipes with spiral seam SY5038-83, with high frequency welding lap welding method for fluid pressure high-frequency welded spiral seam steel pipe. Steel pressure capability, good plasticity, easy welding and machining molding; generally low pressure liquid delivery, with spiral submerged arc welded pipe SY5037-83, using double-sided automatic submerged arc welding, or the legal system into a single for water, gas , air and steam is generally low pressure liquid delivery such as submerged arc welding steel pipes. 
 Spiral steel pipe manufacturer: Tianjin TEDA Hongye Steel Co., Ltd. 
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