N.D. Admin. Code 33.1-14-03-06

Current through Supplement No. 395, January, 2025

Section 33.1-14-03-06 - Hydrostatic pressure tests

A hydrostatic pressure test, when applied to boilers of riveted or welded construction, except locomotive boilers, may not exceed one and one-half times the maximum allowable working pressure. Hydrostatic pressure applied to locomotive boilers may not exceed one and one-quarter times the maximum allowable working pressure. During the hydrostatic pressure test, the safety valve or valves must be removed, or each valve disk must be held down by means of a testing clamp and not by applying the additional load to the spring with the compression screw. The minimum temperature of the water used to apply a hydrostatic test must not be less than sixty degrees Fahrenheit [15.6 degrees Celsius], nor shall it exceed one hundred twenty degrees Fahrenheit [49.3 degrees Celsius]. (Note: For all cases involving the question of tightness, the pressure may be equal to the release pressure of the safety valve or valves having the lowest release setting.)

N.D. Admin Code 33.1-14-03-06

Adopted by Administrative Rules Supplement 2020-377, July 2020, effective 7/1/2020.

General Authority: NDCC 23.1-16

Law Implemented: NDCC 23.1-16