Stainless steel seamless pipe is a hollow steel bar that is manufactured without a seam. It is a highly versatile material, commonly used in gas and fluid transport. Unlike welded pipe, stainless steel pipes are rust-resistant, which makes them ideal for applications that require high temperatures. Additionally, they are easy to clean, which makes them ideal for use in food and pharmaceutical industries. So, why choose stainless steel seamless pipe? Here are the pros and cons.
Actual Corrosion Resistance Depends On The Composition Of The Pipe
Stainless steel seamless pipe is made by cutting a steel plate to a specified thickness pd, which is the outer diameter of the pipe. The thickness of the wall is extremely uniform across the entire circumference, and tolerances are minimal. There is no seam to catch on the edge or kink when welding, which can make for an aesthetically pleasing pipe. However, there are a few differences between welded and seamless pipe.
Seamless piping starts as a solid cylindrical hunk of steel called a billet. A mandrel is then used to pierce the middle of the billet, which is then rolled and stretched to the precise diameter and wall thickness. While some forms of seamless pipe do not require heat treatment, other types do. Read the specifications to determine whether or not your chosen pipe requires heat treatment. If not, you’ll want to avoid it.
Stainless steel welded pipes can withstand harsh conditions, but the actual corrosion resistance depends on the composition of the pipe. While welded pipe has the same chemical composition as the metal itself, the weld between two seams may be weaker or stronger, making it more vulnerable to corrosion. However, ASTM provides supplemental tests to demonstrate that seamless pipe has the same corrosion resistance as the metal itself. Moreover, if the weld was not fully heat-treated, it would increase the rate of corrosion.