System for coating welded pipe joints with weighting material

Details System for coating welded pipe joints with weighting material System for coating welded pipe joints with weighting material

1983-10-26

1985-07-16

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264267, 422135, 425501, B29G 700, B32B 3106

Patent

active

045295689

ABSTRACT:
A system for coating a welded joint in butt-welded pipes, comprising the following stages: feeding a first component constituted by a mixture of modified polyurethane resins premixed with a high-density inert material of well defined particle size to the hopper of a screw feeder by way of a regulator valve which meters its throughput; conveying said first component in the form of a slurry by means of said screw feeder into a blade mixer where it is carefully mixed with a second component constituted by a liquid hardening catalyst in a suitable mixing proportion by means of a metering pump and by way of a heat exchanger; and finally filling a form surrounding said joint with the catalyzed mixture leaving said blade mixer.

REFERENCES:
patent: 1620154 (1927-03-01), Furman
patent: 3336184 (1967-08-01), Stastny et al.
patent: 3726950 (1973-04-01), Turzillo
patent: 3949461 (1976-04-01), Thastrup
Brydson, J. A., Plastics Materials, Princeton, N.J., D. Van Nostrand, .COPYRGT. 1966, p. 489.

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