API-RP-576

Normally, the deviation of the pop pressure from the set
pressure should not exceed;
±2 psi for pressure ≤ 70 psi
±3 % for pressure > 70psi
[see ASME BPVC Section VIII, Division 1, Paragraph UG 134(d)(1)].
Within 0 % or +10 %.
[see ASME BPVC Section VIII, Division 1, Paragraph UG 125(c)(3)].
Any allowance for hot setting should be made in accordance with the
manufacturer's data. Any adjustment to the CDTP required to
compensate for (1) in-service backpressure, (2) service temperature, or
(3) test media should be made in accordance with the manufacturer's or
user’s valve specification data.
Fion Zhang/ Charlie Chong