Subsea BOP Hydraulic Accumulator & Closing Time Calculator

Size surface and subsea nitrogen-charged accumulator bottles, calculate adiabatic gas expansion pressures, and verify API 16D ram closure timing.

Ram Function Type:

Function Fluid Demand (gallons):

Water Depth (ft):

Bottle Rated Capacity (gallons):

Maximum Operating Pressure P3 (psig):

Minimum Operating Pressure P2 (psig):

Surface N2 Precharge Pressure P0 at 70°F (psig): Must account for hydrostatic head + seabed cold (35°F)

Usable Fluid Volume per Bottle:

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— % volume efficiency

Minimum Required Bottles:

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Total bank capacity: — gal

Estimated Ram Closing Time:

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API 16D Closing Time Limit:

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API 16D Compliance Status:

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