Weld steel pipe or seamless steel pipe is a better choice for your project

In the current steel pipe market, we can often find two major categories of pipe: welded steel pipe and seamless steel pipe. There are many customers have asked us about how to make a choice between these two types of pipe. To make a choice for a project between different types of steel pipe or tube seems always a headache issue among most of end-users in life. Obviously, the difference in the basic manufacturing method is from their names. Seamless pipe is extruded and drawn from a billet while welded steel pipe is produced from a strip that is roll formed and welded to produce a tube.

As it is well known, everything has two sides. Each type of steel pipe also has its own merits and drawbacks. What really matters to you is to select the proper type of products for your project as per the specific requirements of the practical applications. In some cases, although the working pressure of welded pipe is 20% less than that for a similar seamless pipe, working pressure is not the determining factor for choosing seamless pipe over welded pipe for analyzer sample lines. The difference in potential impurities, which reduce the corrosion resistance of the finished pipe, is why seamless pipe is specified. Hot dipped galvanized pipe has been considered popular a lot among many users today. For one thing, the galvanization process protects the steel from rusting damage that can occur during transportation, installation and service. The zinc layer on the surface of pipe can form a barrier protection for steel products to extend the service life in applications. For the other thing, this layer is also resistant to wear and scratches, which makes the steel look more attractive.

Generally speaking, there is a difference in the steel pipe prices between these two types of pipe due to different manufacturing methods in a mill.
Welded pipes are typically more cost effective than their seamless equivalents. And the wall thickness of welded pipes is generally more consistent than that of seamless pipes. On the other hand, the main perceived advantage of seamless pipes is that they don’t have a weld seam. Traditionally, the seam of welded pipes has been viewed as a weak spot, vulnerable to failure and corrosion. For many years, this fear was probably justified. However, in recent years improvements in the manufacturing process for welded steel pipes such as some cold rolled steel pipes have boosted the strength and performance of the weld seam to levels indistinguishable from that of the rest of the pipe.