How to Identify Seamless Stainless Steel Pipe or ERW Stainless Steel Pipe?
Great Steel Pipe tells you, to identify that a pipe supplied is seamless stainless steel pipe or ERW stainless steel pipe, simply read the stencil on the side of the pipe. If it is ASTM A53, Type S means seamless. Type F is furnace but welded, type E is Electrical resist welded. The difference between seamless stainless steel pipe and ERW stainless steel pipe: 1. ERW steel pipe is manufactured by rolling metal and then welding it longitudinally across its length. Seamless pipe is manufactured by extruding the metal to the desired length; therefore ERW steel pipe have a welded joint in its cross-section, while seamless pipe does not have any joint in its cross-section through-out its length. 2. In Seamless steel pipe, there are no welding or joints and is manufactured from solid round billets. The seamless pipe is finished to dimensional and wall thickness specifications in sizes from 1/8 inch to 26 inch OD. Applicable in for High-pressure applications such as Hydrocarbon...