F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
189/47, 189/70
F16L 9/02 (2006.01)
Patent
CA 1044619
ABSTRACT OF THE DISCLOSURE Outer wrap for pipelines is made of essentially flat thermoplastic fibers preferably woven in a basket weave pattern with from about 15 to 20 per cent of the fabric area being open. On wrapping a pipe freshly coated with coal tar or equivalent material, the wrap does not tent to sink into the coating as is found to be the case with other outer wraps, such as those made from round glass fibers. Because of the ability of the mesh wrap of this invention to eliminate air entrapment during the wrapping operation, an essentially holiday-free coating results. This system also lends itself to uniform distribution of cath- odic current over the entire surface. The tough, smooth wrap- ping does not allow cold flow of coating material through the fabric due to the weight of backfill and tension of the wrap.
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