What is the thickest wall thickness of the straight seam steel pipe?

Due to the limited pressure of the press, the thickness of the wall thickness of the straight seam steel pipe(LSAW pipe) can reach a maximum of 50mm. If the pressure exceeds 50mm, the pressure cannot be reached, and only seamless steel pipes can be used.

The thinnest straight seam steel pipe wall thickness is 8mm. Because the production of straight seam steel pipe, the first step is to press the steel plate into a circular shape, so the steel plate needs to have a certain thickness. If the steel plate is too thin, the press cannot crush the steel plate; if it is pressed less than the thinnest steel plate, severe deformation will occur. Even when production is complete, it is oval. Therefore, the thinnest straight seam steel pipe wall thickness can reach 8mm.

Can straight seam steel pipe be used as seamless steel pipe?

Nowadays, competition in all walks of life is very fierce, and the straight seam steel pipe industry is no exception. To increase profits, many manufacturers use straight seam steel pipes as seamless steel pipes. This behavior is completely wrong, and let's go into more detail about it.

The straight seam steel pipe adopts submerged arc welding or resistance welding, so that the straight seam steel pipe has a weld seam. The general business uses a polishing machine to polish the weld, and after variable grinding and polishing, the weld will be ground; if the surface is smooth, it can be regarded as a seamless steel pipe. It is invisible to professionals, and this forgery makes it impossible for equipment to detect whether it is a straight seam steel pipe or a seamless steel pipe. If an additional coat of anti-rust paint is applied, it is even more difficult to distinguish, causing great distress to many buyers.

So how to distinguish between straight seam steel pipe and seamless steel pipe? Seamless steel pipes are generally produced directly in steel mills, and straight seam steel pipe manufacturers cannot produce them at all. Generally, they are outsourced. At the time of purchase, we will try our best to request the guarantee and certificate of the steel pipe from the supplier. And, even if they do well, there will be marks. Generally, the weld width of straight seam steel pipe is about two centimeters. After buying the seamless steel pipe, if you see a trace of about two centimeters on the entire steel pipe, you can cut it and verify it publicly to see if there is any problem; the seamless steel pipe is coated with anti-rust paint, we can do it in a simple and rude way Verification, i.e. cutting the steel pipe directly in the middle section, to verify that it is seamless. Straight seam steel pipe is welded by folding a piece of steel plate in half, and has joints.

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