How to Produce Welded Steel Tube
A tube is a closed shape used to perform some structural function. The shape can be round, square, rectangular or whatever can be designed and manufactured for a particular application. Round tubes differ from pipes in the way they are dimensioned. A 1 1/2-inch round tube has a 1 1/2-inch outside diameter. A 1 1/2-inch round pipe has a 1 1/2-inch inside diameter. The reason being that the outside of tubes is important for structures, however the inside of pipes is used for fluid flow.
Welded Steel Tube
Welded steel tubing is made from either hot-rolled or cold-rolled steel that is provided to the tubing manufacturer in coils. The coil may be processed to remove scale, improve finish, amend heat treatment or in other ways to achieve the specified end product. The coil is then run through grooved rollers until the shape has been formed and the free edges are correctly spaced for welding.
The edges of the tube are butt welded together, generally with electrical resistance welding. The outside, and sometimes the inside, welding residue is then removed. The tube, which is at this point somewhat oversized, is then put through two semicircular rollers that bring it to its final outside dimension.
Welded Steel Tube
Welded steel tubing is made from either hot-rolled or cold-rolled steel that is provided to the tubing manufacturer in coils. The coil may be processed to remove scale, improve finish, amend heat treatment or in other ways to achieve the specified end product. The coil is then run through grooved rollers until the shape has been formed and the free edges are correctly spaced for welding.
The edges of the tube are butt welded together, generally with electrical resistance welding. The outside, and sometimes the inside, welding residue is then removed. The tube, which is at this point somewhat oversized, is then put through two semicircular rollers that bring it to its final outside dimension.
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