Common material of Big diameter sprial steel pipe

Pressurized fluid conveying carbon steel pipe with large diameter spiral SY5036-83 is mainly used for conveying oil, natural gas pipeline; Pressurized fluid conveying with large diameter spiral pipe SY5038-83, using high-frequency welded lap welding method, used in pressurized fluid conveying screw steel tube. Steel tube confined ability, good plasticity, easy to welding and processing molding; General low-pressure fluid conveying spiral steel pipe SY5037-83, adopt double automatic submerged arc welding or one side welding into legal system for water, gas, air and steam general low-pressure fluid conveying with submerged arc welded steel pipe straight seam steel pipe. Now commonly used standards of the large diameter spiral pipe can be divided into: SY/T5037-2000 (solid, also known as the common fluid pipeline surrogate spiral steel tube), GB/T9711.1-1997 (national standard, also known as oil and gas industry conveying pipe delivery technical conditions in the first part: grade A steel tube strict (so far have GB/T9711.2 grade B steel pipe)), API 5 l (American petroleum institute, also known as the pipeline steel pipe, which is divided into PSL1 and PSL2 two levels), SY/T5040-92 (pile with large diameter spiral steel tube) spiral pipe material Q235A, Q235B. Q23b, 0 cr13, 1 cr17, 00 cr18ni9 cr19ni11, 1, 0 cr18ni11nb. Q345 L245 L290 X42 X46 X70, X80.

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