System for coating welded pipe joints with weighting material
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United States of America Patent
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-
Jul 16, 1985
Grant Date -
N/A
app pub date -
Oct 26, 1983
filing date -
Nov 23, 1982
priority date (Note) -
Expired
status (Latency Note)
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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.
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