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.
NEW - Click here to purchase our new piping hydrostatic test pack! 1. Pressure source and test gauge should be upstream of check valve. If pressure source is downstream, check valve should have flapper removed or jacked?up. (Pressure must be released downstream of check valve after test completion.) 2. Ensure that test blinds installed are the Correct thickness.