API RP 581 - 3rd Ed.2016 - Add.2-2020 - Risk-Based Inspection Methodology

RISK-BASED INSPECTION METHODOLOGY, PART 3—CONSEQUENCE OF FAILURE METHODOLOGY 3-55
Table 4.8—Component Damage Flammable Consequence Equation Constants
Continuous Releases Constants
Instantaneous Releases Constants
Fluid
Fluid Type
Autoignition Not Likely
(AINL-CONT)
Autoignition Likely
(AIL-CONT)
Autoignition Not Likely
(AINL-INST)
Autoignition Likely
(AIL-INST)
Gas Liquid Gas Liquid Gas Liquid Gas Liquid
a b a b a b a b a b a b a b a b
C1-C2 TYPE 0 43.0 0.98 280.0 0.95 41.0 0.67 1079 0.62
C3-C4 TYPE 0 49.48 1.00 313.6 1.00 27.96 0.72 522.9 0.63
C5 TYPE 0 25.17 0.99 536.0 0.89 304.7 1.00 13.38 0.73 1.49 0.85 275.0 0.61
C6-C8 TYPE 0 29.0 0.98 182.0 0.89 312.4 1.00 525.0 0.95 13.98 0.66 4.35 0.78 275.7 0.61 57.0 0.55
C9-C12 TYPE 0 12.0 0.98 130.0 0.90 391.0 0.95 560.0 0.95 7.1 0.66 3.3 0.76 281.0 0.61 6.0 0.53
C13-C16 TYPE 0 64.0 0.90 1023 0.92 0.46 0.88 9.2 0.88
C17-C25 TYPE 0 20.0 0.90 861.0 0.92 0.11 0.91 5.6 0.91
C25+ TYPE 0 11.0 0.91 544.0 0.90 0.03 0.99 1.4 0.99
Pyrophoric TYPE 1 12.0 0.98 130.0 0.90 391.0 0.95 560.0 0.95 7.1 0.66 3.3 0.76 281.0 0.61 6.0 0.53
Aromatics TYPE 1 17.87 1.097 103.0 0 374.5 1.055 11.46 0.667 70.12 0 512.6 0.713 701.2 0
Styrene TYPE 1 17.87 1.097 103.0 0 374.5 1.055 11.46 0.667 70.12 0 512.6 0.713 701.2 0
Water TYPE 0
Steam TYPE 0
Acid/Caustic-LP TYPE 0
Acid/Caustic-MP TYPE 0
Acid/Caustic-HP TYPE 0
Methanol TYPE 1 0.02256 0.9092 1750.6 0.9342 28.1170 0.6670 1.9188 0.9004
H2 TYPE 0 64.5 0.992 420.0 1.00 61.5 0.657 1430 0.618
H2S TYPE 0 32.0 1.00 203.0 0.89 148.0 0.63 357.0 0.61
HF TYPE 0
CO TYPE 1 0.107 1.752 69.68 0.667
DEE TYPE 1 39.84 1.134 737.4 1.106 320.7 1.033 6289 0.649 155.7 0.667 5.105 0.919 5.672 0.919
PO TYPE 1 14.61 1.114 1295 0.9560 65.58 0.667 3.404 0.869
EEA TYPE 1 0.002 1.035 117.0 0 8.014 0.667 69.0 0
EE TYPE 1 12.62 1.005 173.1 0 38.87 0.667 72.21 0
EG TYPE 1 7.721 0.973 108.0 0 6.525 0.667 69.0 0
EO TYPE 1 31.03 1.069 136.3 0.667