Measuring and testing – With fluid pressure – Leakage
Patent
1997-08-15
2000-05-30
Williams, Hezron
Measuring and testing
With fluid pressure
Leakage
73 38, G01M 308, G01N 1508
Patent
active
060678445
ABSTRACT:
The semi-permeable characteristics of polymeric liners may be used to characterize defects, if present, in loose liners contained inside piping and equipment. The use of polymer-lined equipment is common in the chemical, refining and other industries where the polymeric liner offers excellent chemical resistance and the outer shell gives the required strength and rigidity. Permeability characteristics of liners are investigated with particular reference to volatile process gasses and/or process-soluble tracer gasses. The resulting data are used to establish nondestructive testing techniques for evaluating the integrity of lined equipment during normal operation where a mass spectrometer equipped with a sampling probe is used as the sampling and sensing devices. Real-time data is compared to characteristic data, obtained under laboratory conditions, on a membrane of the polymer from which the liners are made. Acceptance or rejection of the equipment is determined by such comparison. Equipment containing defective liners may be removed from service before the defect causes a leak.
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Shulver Roderick Leonard
Westbrook Paul Alfred
Muller Kim
Politzer Jay L.
Shell Oil Company
Williams Hezron
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