Section 665.1054. Standards: pressure relief devices in gas or vapor service.

 

(1)  Except during pressure releases, operate each pressure relief device in gas or vapor service with no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background, measured by the method specified in s. NR 665.1063 (3) .

(2)  

(a) After each pressure release, return the pressure relief device to a condition of no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background, as soon as practicable, but no later than 5 calendar days after each pressure release, except as provided in s. NR 665.1059 .

(b) No later than 5 calendar days after the pressure release, monitor the pressure relief device to confirm the condition of no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background, measured by the method specified in s. NR 665.1063 (3) .

(3)  Any pressure relief device that is equipped with a closed-vent system capable of capturing and transporting leakage from the pressure relief device to a control device described in s. NR 665.1060 is exempt from subs. (1) and (2) .

History: CR 05-032 : cr. Register July 2006 No. 607 , eff. 8-1-06.