STEEL TUBING

ERW Tubing (Electric Resistance Welded)

The pipe seam is welded in the following process. A steel strip is unwound from coils, passes through a series of contoured rollers which cold-form the material into a circular shape. The edges are forced together under pressure then welded by heating the material to temperatures above 2000° F.  The steel material used is usually SAE 1010 , and can be cold-rolled steel (for thinner wall) or hot-rolled steel.

(DOM) Drawn Over Mandrel

Basically, start with a ERW pipe and cold draw it over a mandrel. The cold drawn process provides the tube with better dimensional tolerances, improved surface finish and the strongest weld strength achievable.  Click here for details

Seamless Mechanical Tubing

The seamless tube is normally extruded. A solid steel bar is pierced though the centre using a die, turning the solid round into a round tube. The are two kinds of seamless pipes:

-Cold Drawn Seamless (CDS): normally made from SAE 1018, having precise tolerances, good surface finish, and High strength to weight ratio

-Hot Finish Seamless (HFS): normally made from SAE 1026, cost effective, having less critical tolerances and a scaly finish . Click here for details