The,characteristics,spiral,ste technology The characteristics of spiral steel pip

Today LED technology is replacing the technology of old traditional lights. If you are also planning to replace traditional florescentbulbs with LED tube lights on your own then here are some important tips, which will be helpful for you in The huge variety of home school supplies available does notmake choosing what to buy easier – it makes it harder.  With so much choice and brands that promisethe earth and yet are often so like one another, parents are often left in aquand

Reference of the steel pipe, straight seam welded pipe production technology is simple, high production efficiency, low cost, rapid development. And the intensity of the spiral welded pipe is usually higher than straight seam welded pipe, can use the narrow billet production of large diameter welded pipe, you can also use the same width of billet in the production of different pipe diameter welded pipe. But compared with the equivalent length of straight seam pipe, weld length is increased by 30% ~ 30%, and the production speed is low. So, a relatively small diameter welded pipe generally USES the straight seam welding, large diameter welded pipe is mostly in the form of spiral welded pipe.Spiral steel pipe standard classification: confined fluid conveying with spiral seam submerged arc welding steel pipe (SY5037-2008) is mainly used for conveying oil, natural gas pipeline; Pressurized fluid conveying with spiral seam high frequency welded steel pipe (SY5038-83), mainly use the high frequency welded lap welding method, used in pressurized fluid conveying spiral seam high frequency welding steel pipe. Steel tube confined ability, good plasticity, easy to welding and processing molding; General low-pressure fluid conveying spiral seam submerged arc welding steel pipe (SY5037-83), using double-sided 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 welding steel pipeNow commonly used standards of the spiral steel pipe can be divided into: SY/T5037-2000 (solid, also known as the common fluid conveying pipe with spiral seam submerged arc welding steel pipe), 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), API 5 l (American petroleum institute, also known as the pipeline steel pipe), SY/T5040-92 (pile with spiral seam submerged arc welding steel tube)Spiral tube material: Q235A, Q23b, 0 cr13, 1 cr17, 00 cr18ni9 cr19ni11, 1, 0 cr18ni11nb. Q345 L245 L290 X42 X46 X70 X80



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