B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
189/68
B32B 3/02 (2006.01) F16L 57/02 (2006.01)
Patent
CA 1063530
Abstract of the Disclosure Crack arresters for pipelines comprising a structure of ductile material of high tensile strength applied directly to the pipewall. The structure has the form of a spring, applied around the pipewall under prestress. The spring may have the shape of a helix or the shape of a spiral.
255232
Beaujean Joseph M.e.
Hayes David J.
Lincklaen-Arriens Jan
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