Shape memory - pipe coupling for under water pipes

摘要

A shape memory alloy pipe coupling in the present invention for joining two pipes (1), the pipe coupling comprising a tube (2) of a shape memory alloy, and a cover (3) of stainless steel having a sufficient thickness and having high corrosion resistance for covering the tube. The shape memory alloy is enclosed by the cover of high corrosion-resistant stainless steel, by which high-temperature water can be prevented from making the shape memory alloy brittle and from corroding and damaging the shape memory alloy particularly through galvanic corrosion even in the case where such high-temperature water exists in the inside or outside of the pipes.