Steel pipe is a relatively common pipe material. It can be divided into different types such as
seamless pipe (smls) and welded pipe. So what is the difference between seamless pipe and welded pipe? Next, the
carbon steel pipe supplier will briefly introduce to you.
1) What is the difference between seamless pipe and welded pipe?
1. Different process
The seamless pipe is made by perforating the billet or solid tube embryo, and then undergoing hot rolling or cold rolling. Welded pipes are made by bending and welding steel plates or strips.
2. Different appearance
There are no seams on the surface of seamless steel pipes. There are generally welded seams on the surface of the welded pipe.
3. Different wall thickness
The precision of the seamless steel pipe is low, and the wall thickness is relatively thick. The steel pipe of the welded pipe has high precision, and the wall thickness is usually relatively thin.
4. Different raw materials
Seamless steel pipes use billets or solid tube blanks. Welded pipes use steel plates or strips.
5. Different performance
In terms of corrosion resistance, pressure bearing and high temperature resistance, seamless steel pipes are better than welded pipes.
6. Different prices
Seamless steel pipes are more expensive than welded pipes because the production process of seamless steel pipes is more complicated and its cost is higher.
7. Different functions
Seamless steel pipes are generally used as pipelines for conveying fluids in special environments such as high pressure resistance and high temperature resistance. Welded pipes are generally used as low-pressure fluid delivery pipelines.
2) What should be paid attention to when purchasing seamless steel pipes?
1. When purchasing seamless steel pipes, everyone should check whether the specifications and models of seamless steel pipes meet the requirements. We can use a ruler to measure whether the length, curvature, wall thickness, etc. of the pipe are consistent with those marked in the product information. If there is an error, whether the error meets the requirements of the relevant standards.
2. When purchasing seamless steel pipes, we need to pay attention to the quality of the steel pipes. For example, there should be no flaws such as cracks and scars on the surface of seamless steel pipes. Usually formal and qualified seamless steel pipes have a certificate of conformity, you can ask the merchant to show the certificate of conformity, and check whether the production date, batch number, factory name and other relevant information on the certificate of conformity are complete and so on.
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