Can Straight Seam Steel Pipes be used in Place of Seamless Steel Pipes?

In order to increase profits, many manufacturers use straight seam steel pipes as seamless steel pipes. This behavior is completely undesirable. We will introduce them in detail below.

Straight seam steel pipes use submerged arc welding (LSAW) or electric resistance welding (ERW). This kind of straight seam steel pipe is just one weld. These merchants use a polishing machine to polish and polish the weld. After the changeable polishing, the weld will be ground. If the surface is smooth, it is a seamless steel pipe as a whole. It is not visible to professionals. This kind of falsification and equipment can’t detect it. Whether it is a straight seam steel pipe or a seamless steel pipe, only experts can polish it. The project needs to be painted with a layer of anti-rust paint, which makes it more difficult to distinguish, which makes many buyers very distressed.

So how to distinguish between straight seam steel pipe and seamless steel pipe? Seamless steel pipes are all made to order directly in steel mills. Straight seam steel pipe manufacturers cannot produce them at all. Generally speaking, they are outsourced. When we buy, we try our best to ask the supplier to provide the guarantee and certificate of the steel pipe. Furthermore, even if they do it well, there are traces. Generally, the width of the weld of a straight seam steel pipe is about two centimeters. After we buy a seamless steel pipe, if we see a trace of about two centimeters on the whole steel pipe, we can cut it. Open to verify, whether there is a problem, the seamless steel pipe is painted with anti-rust paint, we can use a simple and rude method to verify, that is, directly cut the steel pipe in the middle part to verify that the seamless steel pipe is not butt, and Straight seam steel pipes are welded after a sheet of steel is folded in half, and there are joints.

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