Strength of welded steel pipe
Source: admin Time:2018/9/5 11:07:16
Strength is generally higher than that of straight seam welded
steel pipes. Large diameter welded pipes can be produced with narrow blanks, and different diameter
welded steel pipes can also be produced with blanks of the same width. However, compared with the straight seam pipe of the same length, the weld length is increased by 30~100% and the production speed is low. Therefore, small diameter welded steel pipes are mostly welded longitudinally, while large diameter welded steel pipes are mostly spiral welded.
Welded steel pipe is divided into two types: automatic submerged arc welded steel pipe and high frequency welded steel pipe.
The spiral seam automatic submerged arc welded steel pipe is divided into two categories: class a pipe and class B pipe according to the pressure of the conveying medium. welded steel pipes are generally welded with ordinary carbon steel Q235, Q235F and common low alloy structural steel 16Mn. Spiral welded steel pipe are welded with Q235, Q235F, Q195 and other steels and used as low pressure fluid conveying pipes.
There is no uniform product standard for spiral seam high frequency welded steel pipe, which is generally made of common carbon steel Q235, Q235F and other steel.
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