Cell biology (formerly called cytology, from the Greek ÎºÏÏÎ¿Ï, kytos, vessel) is a branch of biology that studies the different structures and functions of the cell and focuses mainly on the idea of the cell as the basic unit of life.
(B) For a cylinder having a water capacity over 12 pounds-- (1) By hydrostatic test without determination of expansion (modified hydrostatic test method). A retest must be performed 12 years after the original test date and at 7-year intervals; or (2) By hydrostatic test using the water jacket method. A retest must be performed 12 years after the original test date and at 12-year intervals thereafter.
What this shows is that successively smaller defects are tolerable as the pressure level is. increased. The good news is that this is the explanation for the usefulness of hydrostatic testing. to a level in excess of the operating pressure as a means of integrity assessment. Significance of a Hydrostatic Test. For purposes of this section of the presentation, let us consider Figure 6.