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Light Pipes And Raw Steel Pipes
Aug 31, 2017

Light pipes and raw steel pipes are made into drill rods after many processing steps. First of all, through the pipe thickening process processing, light tube outer surface of bend, pipe wall thickening. Next, thread processing and plating of copper to increase strength. Non destructive quality control shall then be carried out, followed by welding of the pipe fittings. The pipe then undergoes welding, heat treatment and welding to eliminate the welding residual stress. Other testing of steel pipe products shall be carried out before coating and packing the finished drill stem, including hardness test, pressure test and nondestructive test.

The length of the drill rod is usually about nine meters.