Section 345.611. Overpressure protection.

 

(1)   Discharge capacity of plate heat exchangers. This is a department alternative to the requirements in ANSI/IIAR 2 section 11.2.7: The minimum required relief device capacity for a plate heat exchanger based on an external heat addition scenario may be calculated in accordance with the following equation:

- See PDF for diagram

where:

C r,plate HX   =   minimum required relief device capacity for the
    plate heat exchanger (lb m /min of air)

f   =   relief device capacity factor

L   =   length of the plate pack (ft)

W   =   width of the plate pack (ft)

H   =   height of the plate pack (ft)

(2)   Discharge piping for atmospheric pressure relief. This is a department rule in addition to the requirements in ANSI/IIAR 2 section 11.3.6.1: Appendix A Tables A-3 may not be used for schedule 80 piping.

History: CR 10-011 : cr. Register August 2010 No. 656 , eff. 9-1-10.