🛡️ ASHRAE 15 / IIAR 2 Dual Relief Assemblies (C = fDL Discharge Air SCFM)

Ammonia Dual Pressure Relief Valve Calculator

Size dual pressure relief valve safety manifolds and atmospheric vent piping for industrial ammonia vessels under ASHRAE Standard 15 & ANSI/IIAR 2: calculate required minimum discharge capacity (C = f x D x L in Lbs air/min converted to SCFM), three-way dual shutoff valve sizing (permitting relief valve replacement without evacuating charge), and safety margins.

1. Project & Operating Inputs

Ammonia Pressure Vessels Protected (Vessel Count e.g. 12 Vessels)

Vessel Outside Diameter (Feet e.g. 5.0 ft Diameter Vessel)

Customer Bid Price for 5-Year Relief Valve Changeout & Testing ($ / Valve)

ASME Certified NH3 Relief Valves, 3-Way Manifold, Vent Piping & Tech ($)

2. Financial Breakdown & Yield

ASHRAE 15 AMMONIA RELIEF VALVES

Turnkey Relief Valve Package Profit

Refrigeration Safety Service Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost