Method for coating welded pipe joints with weighting material

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

C - Chemistry, Metallurgy

09

K

117/69

C09K 3/10 (2006.01) B29B 7/42 (2006.01) B29C 70/74 (2006.01) F16L 59/20 (2006.01)

Patent

CA 1211320

IMPROVED METHOD FOR COATING WELDED PIPE JOINTS WITH WEIGHTING MATERIAL ABSTRACT OF THE DISCLOSURE A method 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 prefixed with a high- density inert material of well defined particle size to the hopper 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 catalysed mixture leaving said blade mixer.

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