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- W1990331067 abstract "Underwater Non-Destructive Testing is a highly complex and emotive subject about which many thousands of words have been written by eminent and extremely knowledgable people. Apart from touching on a few of the fundamentals as a way of introduction, it is not the intention of this paper to enter into the continuing discussion on the philosophy and reasoning behind, or implications of, NDT on underwater structures per se. Rather, its purpose is to relate how one particular company, Vickers Oceanics Limited, set about tailoring an NDT system around a diver lockout submersible in order to utilize certain advantages that this vehicle has over other alternatives at present in use in the North Sea. In short, the article will not be presented from the platform of an NDT inspector, it will represent the viewpoint of an engineer, whose task was to produce a system to meet a market requirement, based on his experience with the underwater environment and his knowledge of the problems, both mental and physical, of the working diver. Introduction In the very early life of a platform there is the need to carry out overall regular inspections. This is to allow the owner to obtain sufficient information and data to build up the story of any progressive deterioration of his structure. The most generally accepted level of inspection at this stage, would simply be detailed video and high resolution photography, combined with measurements of cathodic protection levels and material thickness. As experience and records show the necessity, the level of information obtained may have to be altered. With age the structure may have to be examined in more detail to discover stress or damage areas not immediately apparent in visual or video inspection, therefore more sophisticated NDT procedures would have to be applied. At present the most efficient, and very often only, method of applying the more sophisticated NDT sensors to an underwater structure, is manually by a diver. The alternative being unmanned or conventional manned submersibles including JIM type suits, where access and/or manipulative dexterity may prove to be insoluble problems." @default.
- W1990331067 created "2016-06-24" @default.
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- W1990331067 date "1978-10-24" @default.
- W1990331067 modified "2023-09-26" @default.
- W1990331067 title "Underwater Non-Destructive Testing" @default.
- W1990331067 doi "https://doi.org/10.2118/8102-ms" @default.
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