The use of seamless steel pipe greatly promoted the social development of all walks of life, in this case, the profiteering, because some merchants without conscience the pursuit of profiteering, some of the standard of seamless steel pipe as seamless steel pipe sales, lead to many customers cheated, how to use good methods to identify the seamless steel pipe!
There is a so-called fluid pipe on the market, in fact, is the processed high frequency welding pipe, its treatment method is the original weld with special equipment or planing or grinding off, there is the welding pipe hot rolling.Some illegal businesses use this kind of pipe to deceive us these material personnel, it is hateful.After years of observation and consulting in the industry, I now am correct about this kind of pipe, and now I take it out to discuss with you:
1) All shaved off or ground off will leave traces, some are still very obvious, someti
2) mes more obvious after rust removal with tools;
2) We carefully observe the following, 20 # steel and Q235 due to different materials, their rust is also different;
3) The manufacturers of this kind of pipe are afraid of taking responsibility, and their quality certificates are fluid pipe and dare not say that fluid seamless steel pipe;
4) The merchants selling this kind of pipe will generally require to settle accounts according to the theoretical weight, we all know that the real domestic seamless steel pipe is beyond the standard thickness, generally weighing;
5) There are also flaw detection and component testing, and both methods have limitations, because flaw detection is difficult to distinguish between the hot-rolled welding pipe
12Cr1MoVG seamless steel pipe is a heat shrinkage processing product, the appearance is more beautiful, so that the overall performance of the steel pipe is increased, forming the seamless steel pipe and seamless steel pipe overall consistent,
There are several common welded pipes on the market, straight seam welded pipe, spiral welded pipe and seamless welded pipe, but straight seam welded pipe and spiral welded pipe are very recognizable. The difference between seamless welded pipe and seamless steel pipe can be seen from several aspects:
First, the welding pipe is generally fixed ruler, and is generally 6 meters, 9 meters or 12 meters.Seamless steel pipe fixing is very few, because the fixing the factory price is very much.
Second, you can look from the cross section of the pipe head, if there is rust, wipe him clean, look carefully, you will find the welding area.
Third, if pickling, it is the most obvious.
There is also worth noting that: generally thick-walled steel pipe will not appear welded pipe counterfeit situation, only thin-walled steel pipe is easy to chaos, in fact, can also be distinguished.
A see whether the wall thickness is uniform, because seamless steel pipe is made of round steel perforation, so generally seamless steel pipe wall thickness will have deviation (with the increasing technology of seamless steel pipe wall thickness deviation smaller and smaller, but some), and welding pipe although after welding bar processing or heat expansion program, but because his raw material is strip steel, so his wall thickness is very uniform.
B welding pipe after thermal expansion if the careful observation can still see the welding bar
In the application of seamless pipe, some industries require this pipe, so how should we distinguish the good and bad of thick wall seamless pipe?Now let me teach you a few tricks.1. The composition of high quality thick wall seamless pipe is uniform and tons of cold shear machine
Shandong Jute Steel Pipe Co.,Ltd.
Contacts: Mr. Ji
WhatsApp: +86 18865211873
WeChat: +86 18865211873
E-mail: jutesteelpipe@gmail.com
E-mail: juteguanye@aliyun.com
Post time: Mar-10-2022
