Thermal Relief Designer
Design thermal pressure-relief protection for blocked-in liquid piping. Lay out a tank and piping runs with gate-valve block points, specify pipe schedule and flange class, and get a recommended staggered set-pressure ladder that cascades relief safely back to the tank.
Thermal-expansion relief sizing
Solar, external-fire, and pump-soak heat cases drive API 520 liquid relief-flow and orifice sizing, mapped to standard API 526 orifice letters.
Cascade set-pressure ladder
Auto-recommends staggered set pressures for every valve relieving in series back to the tank, accounting for built-up and superimposed backpressure and check-valve cracking pressure.
Design-pressure limits
Governing design pressure from ASME B16.5 flange ratings and pipe-schedule Barlow MAWP — flags any set pressure that violates the weakest component.
Engineering calculation document
A full HTML calculation package with step-by-step equations, plus one-click PDF export — referencing API 520/521/526 and ASME B16.5/B36.10/B31.3.
A design aid only. Results are not a substitute for a PE-stamped, code-compliant relief study and must be independently verified.