Covering a steel pipe having a welding seam with a thermoplastic

Details Covering a steel pipe having a welding seam with a thermoplastic Covering a steel pipe having a welding seam with a thermoplastic

1979-11-14

1981-09-01

Hoffman, James R.

Coating processes

Measuring, testing, or indicating

Thickness or uniformity of thickness determined

156 64, 15624413, 427 10, 427286, 427287, 427316, 427375, B05D 126

Patent

active

042872235

ABSTRACT:
A steel pipe with a thermoplastic cover has the coverage of a welding seam reinforced by hot air heating the cover along the plastic and extruding a strip of similar plastic thereon, followed by cold water spray cooling. The pipe is centered as to the position of the welding seam vis-a-vis the heating and extruding equipment during relative longitudinal movement.

REFERENCES:
patent: 3814646 (1974-06-01), Meyer et al.

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