Discrimination Methods of Counterfeit and Bad Seamless Steel Pipe

　　1. False and inferior thick-walled seamless steel pipes are easy to fold. Folding is a kind of folding line formed on the surface of thick-walled seamless steel pipes. This defect often runs through the longitudinal direction of the whole product. The reason for folding is that fake and inferior manufacturers pursue high efficiency, large reduction and ears, folding will occur in the next rolling, folding products will crack after bending, and the strength of thick-walled seamless steel pipe will decrease greatly.

　　2. The appearance of fake and inferior thick-walled seamless steel pipe often has hemp surface. The flake surface is caused by groove wear which causes irregular bump on the surface of thick-walled seamless steel pipe. As the manufacturers of fake and inferior thick-walled seamless steel pipe want to pursue profits, groove rolling often appears to exceed the standard.

　　3. Scar easily occurs on the surface of fake and inferior thick-walled seamless steel pipes. There are two reasons: 1. The quality of the fake and inferior thick-walled seamless steel pipe is not uniform and there are many impurities. 2. The guide equipment of fake and inferior material manufacturers is simple and easy to stick to steel. These impurities bite the roll and cause scarring easily.

　　5. Fake and inferior thick-walled seamless steel pipes are easy to scratch, because the equipment of fake and inferior manufacturers is simple and easy to produce burrs, scratching the surface of thick-walled seamless steel pipes. Deep scratch reduces the strength of thick-walled seamless steel pipes.

　　Hebei Shengtian Group produces ASTM A106 Gr.B High Quality Carbon Seamless Steel Pipe with guaranteed quality. Welcome to inquiry.