Marine Boiler - Operational Pressure Check

Verify boiler operating pressure against design pressure, safety valve set point and classification limits.

BoilerSteamPressureClass

Boiler design pressurebar(g)Current operating pressurebar(g)Safety valve set pressurebar(g)Hydrostatic test pressure (1.5 x design)bar(g)

Operating margin: 2.0bar

Margin %: 10.0%

Compliance: Normal operation

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, limits

\Delta P = P_{design} - P_{operating}

P_{SV} \leq 1.05 \cdot P_{design}

Operating pressure must remain below design pressure with reasonable margin. Safety valve set typically at design pressure (some class rules allow up to 1.05 x design). Hydrostatic test at 1.5 x design at construction. Operating beyond design pressure is forbidden under classification society rules and indicates need for immediate shutdown and investigation. Margin below 5 percent of design typically indicates unusual operating condition; margin below 0 indicates over-pressure event.

Symbol legend

SymbolMeaningUnitSource

Boiler design pressurebar(g)nameplate Current operating pressurebar(g)gauge Safety valve set pressurebar(g)SV stamp

In short

Verify boiler operating pressure against design pressure and safety valve setting.

Learn the theory Marine Auxiliary Engines and Generators