BS Pipes
- Pipe is generally divided into seamless pipe and welded pipe. Welded pipe, sometimes called ERW (Electric Resistance Welded), is made by forming a flat piece of steel into a round shape and welding the edges together. Seamless pipe is made by drawing a solid piece of steel over a mandrel to create a solid tube without a weld seam.
- Pipe size, for both seamless pipe and welded pipe, is most often stated as Nominal Pipe Size, defined by the NPS standard. These NPS standards can be a bit confusing, so we have created a reference to help.