Method of forming covering protecting layer on joint between...

B - Operations – Transporting – 29 – C

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18/975

B29C 65/68 (2006.01) B29C 61/00 (2006.01) B29C 63/00 (2006.01) B29C 63/42 (2006.01) F16L 58/18 (2006.01)

Patent

CA 1199155

METHOD OF FORMING COVERING PROTECTING LAYER ON JOINT BETWEEN COVERED STEEL PIPES ABSTRACT OF THE DISCLOSURE A covering protecting layer is formed on a joint between covered steel pipes each having a protecting concrete layer formed on the periphery thereof by a method wherein a heat- -shrinkable sheet or the low temperature shrinking type is wrapped around the periphery of the joint; a fused mastic is applied onto the periphery of the heat-shrinkable sheet; and then, the applied mastic is cooling whereby the mastic is solidified to form a covering protecting layer.

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