seamless pipe and welded pipe
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What is the difference between seamless pipe and welded pipe?

Date:2018-08-16      View(s):179      Tag:seamless pipe and welded pipe  

Seamless pipe, as the name suggests, is a pipe without a seam or a weld-joint. Welded pipe is manufactured by rolling metal sheet and then welding it longitudinally across its length.Today, let’s see the difference between seamless steel pipe and welded steel pipe.

As below are the specific features list of seamless steel pipe and welded steel pipe for you reference:


1. Seamless pipes don’t have a weld seam. Traditionally, the seam of welded pipes has been viewed as a weak spot, vulnerable to failure and corrosion. In general, welded steel pipes can withhold 20% less working pressure than seamless ones.

2. Seamless pipes has higher working pressures compared to welded pipes of the same material and size due to having no welded seam.
3. Seamless pipes offers superior corrosion resistance.
4. Seamless pipes do not require testing for weld integrity. This is a must for welded pipes.

5. Seamless pipes harden as they are manufactured, so heat treatment after manufacturing is not required. Most welded pipes require heat treatment after manufacturing.

6. Seamless pipes can be substituted for welded pipe but welded pipes may not always be able to be substituted for seamless pipe due to the weld seam.

7. The cost of welded pipes is less expensive than seamless pipes and is readily available in long continuous lengths.
8. The wall thickness of welded pipes is generally more consistent than that of seamless pipes.



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