Limited permeability sheath and application to pressure pipes

Details Limited permeability sheath and application to pressure pipes Limited permeability sheath and application to pressure pipes

1997-11-24

2000-08-29

Robinson, Ellis

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428421, 428458, 428469, 428586, 138131, 138134, 138146, 138154, 25218828, F16L 5706, F16L 918, F16L 1114, F16L 9147

Patent

active

061105503

ABSTRACT:
The present invention relates to flexible pipes with metal armors and metal tubes having a sheath made of an extrudable thermoplastic material for manufacturing an acid gas tight barrier.
The sheath comprises a determined proportion of at least one charge of a product chemically active with acid gases so as to irreversibly annihilate the corrosive effects of these gases, the proportion being determined as a function of the gas permeability of the thermoplastic material.

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patent: 4903735 (1990-02-01), Delacour et al.
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patent: 5555916 (1996-09-01), Kushida
patent: 5686016 (1997-11-01), Veldman et al.
Patent Abstracts of Japan, Publication No. 62084153, Publication Date: Apr. 17, 1987 (JP 60-225377; Oct. 9, 1986).
Database WPI, Section Ch, Week 8721, AN: 87-148693; Derwent Publications Ltd., London, GB (XP 2034251).
Chemical Abstracts, vol. 107, No. 12 (Abstract No. 100531), Columbus, OH USA.
Derwent Abstract of JP 62-84153 A; Vulcanizing Rubber Compositions for Fuel Hoses, Apr. 1987.

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