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What's the difference between 20# seamless steel pipe and seamless steel pipe?

2020-03-13 09:23:42

20# seamless steel pipe is made of steel ingot or solid tube blank by piercing, then hot rolling, cold rolling or cold drawing.
What is the difference between 20# seamless steel pipe and seamless steel pipe?
There are four differences between 20# seamless steel pipe and seamless steel pipe, as follows:
1. Appearance difference: the welded steel pipe has welding bars on the inner wall of the welded pipe, while the 20# seamless steel pipe does not.
2. Different pressure: the pressure of seamed steel pipe is about 10MPa, while that of 20# seamless steel pipe is higher.
3. Different uses: 20# seamless steel pipe is mainly used in the machinery industry, and seamed steel pipe is mainly used in the construction industry.
4. Different process: the seam steel pipe needs to be welded after rolling, and the 20# seamless steel pipe is formed in one time during rolling.

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