14. SEAMLESS PIPES Seamless (SMLS) Steel Pipe is made from a solid round steel ‘billet’ which is heated and pushed or pulled over a form until the steel is shaped into a hollow tube. The seamless pipe is then finished to dimensional and wall thickness specifications in sizes from 1/8 inch to 26 inch OD.
15. ERW PIPES ERW (Electrical Resistant Welded) pipe cold formed from a ribbon of steel pulled through a series of rollers and formed into a tube which is fused through a electric charge. Common sizes for ERW Steel Pipe range from 2 3/8 inch OD to 24 inch OD in a variety of lengths to over 100 feet. Surface finishes are available in bare and coated formats.
17. CDW PIPES CDW (Cold Drawn electrically Welded) pipes are formed by passing a metal sheet through rollers to giving the circular shape and then welded.