What is the difference between stainless erw tube and the seamless stainless pipe?
As the name suggests, pipes that are constructed without the use of a weld seam are known as seamless pipes. Whereas, welded pipes have the presence of a longitudinal weld seam on their surface. In addition to the method of construction, the pressure capacity, cost, and the application of each kind of pipe vary from the other.
The cost difference between stainless seamless and erw ss pipes
Since seamless pipes have a longer manufacturing process, and the operations here are multiple, the cost of seamless pipes is always higher in comparison to a welded pipe. ERW pipes make use of cold formed sheets, which are then joined together by high frequency welding, which is a relatively simple process, with the cost being fractional in comparison to the seamless variety.
Why use stainless seamless pipe instead of erw ss pipes?
There are two benefits of using a seamless pipe. First, the working pressure capacity of a seamless pipe is 20% higher than an erw pipe, because, unlike erw pipes, the application of a higher pressure level will not cause the pipe to fail or burst. And the other, more popular reason for choosing a seamless pipe is that they are not vulnerable to intergranular corrosion. As opposed to seamless pipes, the seam line on welded pipes, in particular, the HAZ or heat affected weld zone gets affected at the grain boundary due to sensitization. This fosters intergranular corrosion, thereby weakening the erw pipe.
GNEE Steel provides high quality stainless steel seamless pipes and stainless steel erw tubes,contact us for enquary:ss@gneesteel.com
