Steel pipe is a relatively common pipe material. It can be divided into different types such as seamless steel pipe and welded steel pipe. So what is the difference between seamless pipe and welded pipe? Next, the editor will briefly introduce it to you.
Seamless pipes are made of steel billets or solid tube blanks that are perforated and processed by hot rolling or cold rolling.
Welded pipe is made by bending and welding steel plates or strips.
There are no seams on the surface of seamless steel pipes.
There are generally welding seams on the surface of welded pipes.
The precision of seamless steel pipes is low and the wall thickness is relatively thick.
The steel pipe of welded pipe has high precision and the wall thickness is usually thin.
Seamless steel pipes use steel billets or solid tube blanks.
Welded pipes use steel plates or strips.
In terms of corrosion resistance, pressure bearing, high temperature resistance and other properties, seamless steel pipes are better than welded pipes.
Generally speaking, the production cost of seamless pipes is relatively high and the processing accuracy requirements are strict, so the price is more expensive than welded pipes. The production cost of welded pipes is lower and easier to produce, so the price is relatively cheaper.
However, the price difference is not absolute. In the market, the prices of steel pipes of different qualities and specifications vary greatly. Moreover, with the advancement of science and technology and the improvement of production technology, the production cost of seamless pipes is gradually declining. Therefore, the specific situation needs to be analyzed based on the actual market conditions.
Seamless steel pipe: Seamless steel pipe is mainly used as petroleum geological drilling pipes, cracking pipes for petrochemical industry, boiler pipes, bearing pipes and high-precision structural steel pipes for automobiles, tractors and aviation.
Welded steel pipes: Electrically welded steel pipes are used in oil drilling and machinery manufacturing; furnace welded pipes can be used as water and gas pipes; large-diameter straight seam welded pipes are used in high-pressure oil and gas transportation; spiral welded pipes are used in oil and gas transportation, pipe piles, bridge piers, etc.
What should you pay 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 the product information. If there is an error, does it meet the requirements of 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 cracks, scars and other defects on the surface of the seamless steel pipes. Generally, formal and qualified seamless steel pipes have certificates. You can ask the merchant to produce the certificate and check whether the production date, batch number, factory name and other relevant information on the certificate are complete, etc.
Regarding the difference between seamless pipes and welded pipes, the editor will briefly introduce it to you here. I hope that after reading this article, I can provide you with reference and help. If you want to know more related information, you can continue to pay attention to this website.
Post time: Dec-05-2023