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

3-46 API RECOMMENDED PRACTICE 581
4.14 Tables
Table 4.1—List of Representative Fluids Available for Level 1 Consequence Analysis
Representative Fluid
Fluid Type
(see Section 4.1.5)
Examples of Applicable Materials
C1-C2 TYPE 0 Methane, ethane, ethylene, LNG, fuel gas
C3-C4 TYPE 0 Propane, butane, isobutane, LPG
C5 TYPE 0 Pentane
C6-C8 TYPE 0 Gasoline, naphtha, light straight run, heptane
C9-C12 TYPE 0 Diesel, kerosene
C13-C16 TYPE 0 Jet fuel, kerosene, atmospheric gas oil
C17-C25 TYPE 0 Gas oil, typical crude
C25+ TYPE 0 Residuum, heavy crude, lube oil, seal oil
H2 TYPE 0 Hydrogen
H2S TYPE 0 Hydrogen sulfide
HF TYPE 0 Hydrogen fluoride
HCl TYPE 0 Hydrochloric acid
Water TYPE 0 Water
Steam TYPE 0 Steam
Acid TYPE 0 Acid, caustic
Aromatics TYPE 1 Benzene, toluene, xylene, cumene
AlCl3 TYPE 0 Aluminum chloride
Pyrophoric TYPE 0 Pyrophoric materials
Ammonia TYPE 0 Ammonia
Chlorine TYPE 0 Chlorine
CO TYPE 1 Carbon monoxide
DEE TYPE 1 (see Note 2) Diethyl ether
HCl TYPE 0 (see Note 1) Hydrogen chloride
Nitric acid TYPE 0 (see Note 1) Nitric acid
NO2 TYPE 0 (see Note 1) Nitrogen dioxide
Phosgene TYPE 0 Phosgene
TDI TYPE 0 (see Note 1) Toluene diisocyanate
Methanol TYPE 1 Methanol
PO TYPE 1 Propylene oxide
Styrene TYPE 1 Styrene
EEA TYPE 1 Ethylene glycol monoethyl ether acetate
EE TYPE 1 Ethylene glycol monoethyl ether
EG TYPE 1 Ethylene glycol
EO TYPE 1 Ethylene oxide
NOTE 1
NOTE 2
HCl, nitric acid, NO 2 , and TDI are TYPE 1 toxic fluids.
DEE is a TYPE 0 toxic fluid.