Failure Rates

Figure 7: System Failure Rates (leaks/system year)

• Utilities, oil, diesel: Approx. 0.035
• Metering, condensate: Approx. 0.04
• Metering, oil: Approx. 0.04
• Processing, gas, sour (HS2/CO2) treatment: Approx. 0.045
• Processing, gas, LPG condensate: Approx. 0.06
• Separation, oil, production: Approx. 0.06
• Separation, oil, test: Approx. 0.075
• Processing, gas, dehydration: Approx. 0.075
• Processing, oil, prod water treatment: Approx. 0.075
• Processing, oil, oil treatment: Approx. 0.08
• Export, condensate: Approx. 0.1
• Subsea well, gas injection: Approx. 0.125
• Utilities, gas, fuel gas: Approx. 0.14
• Export, oil: Approx. 0.155
• Gas, compression: Approx. 0.259

Notes

1. Failure Rates shown for top 15 out of 52 system types.
2. Figures for the period 1-10-92 to 31-03-02.
3. Caution should be exercised when interpreting the failure rate for subsea gas injection well as this calculation is based on a very small equipment population.

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Figure 8: Equipment Failure Rates (leaks/equipment year)

• Pumps, centrifugal, single seal: Approx. 0.007
• Pig launchers, D > 16": Approx. 0.008
• Pig receivers, 12" < D < D 16": Approx. 0.008
• Pumps, reciprocating, double seal: Approx. 0.008
• Pig receivers D > 16": Approx. 0.008
• Compressors, centrifugal: Approx. 0.009
• Heat exchangers, plate: Approx. 0.01
• Xmas trees, P > 10,000: Approx. 0.012
• Pressure vessel, horizontal reboiler: Approx. 0.015
• Pressure vessel, horizontal KO drum: Approx. 0.017
• Expanders: Approx. 0.19
• Pressure vessel, horizontal, other: Approx. 0.02
• Turbines, gas: Approx. 0.024
• Compressors, reciprocating: Approx. 0.065
• Turbines, dual fuel: Approx. 0.072

Notes

1. Failure Rates shown for top 15 out of 119 equipment types.
2. Figures for the period 1-10-92 to 31-03-02.