Records of verification tests shall be ae. It is necessary to be able to detect leaks of L, 40 L or 20 L per 24 h against the background uncertainty of measurement of pressure and pipe wall temperature. The von Mises hypothesis relates the effects of three principal stresses acting at right angles to product yielding. Some pipelines initially operate at pressures below design pressure for long periods, decreasing the initial leak sensitivity in service. Some of the factors to be considered are as follows: Minimum hold periods under various codes vary and may be aw to 24 h.
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Sectors Our standards development activities are divided into industry sectors. These sectors are supported by Stakeholder Engagement Managers who are available to advise and assist stakeholders.
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