The hottest spiral steel pipe and its standard cla

2022-08-12
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Spiral steel pipe and its standard classification

for pressure fluid transmission, spiral submerged arc welded steel pipe sy is used, which is mainly used for pipelines transporting oil and natural gas

spiral seam high-frequency welded steel pipe sy for pressure fluid transmission, spiral seam high-frequency welded steel pipe sy for pressure fluid transmission welded by high-frequency lap welding method. The steel pipe has strong pressure bearing capacity and good plasticity, which is convenient for welding and processing

for general low-pressure fluid transmission, spiral seam submerged arc welded steel pipe sy is used, and the submerged arc welded steel pipe for general low-pressure fluid transmission such as water, gas, air and steam, which is made by double-sided automatic submerged arc welding or single-sided welding method, said the head of Chinalco Zhongzhou Aluminum Co., Ltd

at present, the common standards of spiral steel pipes are generally divided into: sy/t (ministerial standard, also known as spiral submerged arc welded steel pipes for ordinary fluid transmission pipelines), gb/t9711 (national standard, also known as oil and natural gas industry transmission steel, as the technical delivery conditions of transformer pipes in the material industry, part I: class a steel pipe (up to now, gb/t9711.2 class B steel pipe with strict requirements)), api-5l (American Petroleum Association, also known as pipeline steel pipe; which is divided into two levels PSL1 and PSL2), sy/concrete small hollow block experimental method gb/t 4111 ⑴ 997t (spiral welded steel pipe for pile)

sy/t is the standard set by the Ministry of petroleum, which is generally called the ministerial standard

gb/t9711 National standard spiral pipe, oil and natural gas industry transmission steel pipe, class a

spiral seam high-frequency welded steel pipe (SY) for general low-pressure fluid transmission is made of hot-rolled steel strip coil, which is often formed by warm spiral, and welded by high-frequency lap welding method. If deformation will affect the stability of pressure regulation function, it is used for spiral seam high-frequency welded steel pipe for general low-pressure fluid transmission

spiral welded steel pipe (SY) for pile is made of hot-rolled steel strip coil as pipe blank, which is often formed by warm spiral, and is made of double-sided submerged arc welding or high-frequency welding. It is used for steel pipes for foundation piles such as civil building structures, wharves, bridges, etc

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