Nowadays, all walks of life are really very competitive. No matter what industry has competition, the straight seam steel pipe industry is no exception. In order to increase profits, many manufacturers will pretend to be seamless steel pipe and stop using it. This behavior is complete. Is undesirable, let's introduce it in detail below. Straight seam steel pipes are all used submerged arc welding or resistance welding.
This kind of straight seam steel pipe is just one weld seam. These merchants use a polishing machine to polish the weld seam. After the changeable grinding and polishing, the weld seam will be ground off. The overall appearance of lubrication is seamless steel pipe, not professional. People basically can't tell, this kind of mystery, and the equipment has no way to detect whether it is a straight seam steel pipe or a seamless steel pipe.
As long as an expert can tell, some projects require a layer of anti-rust paint on the surface, 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 directly in steel mills. Straight-seam steel pipe manufacturers are basically unable to produce them. Generally speaking, they are outsourced. When purchasing, we try to let the supplier provide the guarantee and certificate of the steel pipe. Moreover, even if they do well, there are traces.
The width of the weld seam of ordinary straight seam steel pipes is about two centimeters. After we purchase seamless steel pipes, if we see traces of about two centimeters on the whole steel pipe, we can cut it to verify whether there is any problem. For the anti-rust paint, we can use a simple and rude method to stop the verification, which is to directly cut the steel pipe in the middle part for verification. The seamless steel pipe is not butted, and the straight seam steel pipe is stopped after a sheet of steel is folded in half. Welded, there are joints.