Related Topics:

RBI Assessment

Consequence Properties

The Consequences Properties tab allows you to make the required inputs to evaluate the consequences of failure in terms of flammability, toxicity and financial loss. These properties apply regardless of the selected damage factors and damage factor properties.

Note: For Tank650 equipment, if a COURSE or TANKBOTTOM component is not pressurized (i.e., the operating pressure is 101325 Pa) then the analysis is simplified and has fewer consequence properties.

RBI performs an API RBI RP Level 1 consequence analysis to calculate the risk based upon releases for common risk-causing fluids. Flammable and non-flammable consequence areas are calculated for each hole release rate based upon a given hole size within the component, and these are all combined based on the relative frequency of failure for each hole size. (See the Fluid List.)

If desired, you can use the Notes column, , to record any notes about the information supplied. These notes only appear in the RBI Properties tab and do not display in any reports. Double-click inside the cell to open the Notes window. An icon in the cell indicates that notes have been saved for that field.

Flow Rates/Flammability

The Flow Rates/Flammability properties define the general properties of the process fluid and the storage/process area. Note the following:

Toxicity

The Toxicity properties are used to determine the physical damage from loss of containment or rupture that may occur to the surrounding equipment, components, personnel and environment. The impact areas may occur from pool fires, flash fires, fireballs, jet fires and/or vapor cloud explosions. Note the following:

Financial

The Financial properties are used to determine the monetary cost of failure. These calculations take into consideration or calculate the hole costs, material costs, plant downtime, cost of the equipment, the cost on the surrounding area and the personal injury costs.

Fluid List

The following table shows the risk-causing fluids that can be considered in the analysis.

Representative Fluid

Examples of Applicable Materials

C1 - C2

Fuel gas, methane, ethane, ethylene, LNG

C3 - C4

Propane, butane, isobutane, LPG

C5

Pentane

C6 - C8

Gasoline, naptha, light straight run, heptane

C9 - C12

Diesel, kerosene

C13 - C16

Jet fuel, kerosene, atmospheric gas oil

C17 - C25

Gas oil, typical crude oil

C25+

Residuum, heavy crude, lube oil, seal oil

Hydrogen (gas)

Hydrogen only

Hydrogen Sulfide (H2S)

Hydrogen sulfide only

Hydrogen Fluoride

Hydrogen fluoride

Water

Water

Steam

Steam

Acid (low)

Acid, caustic

Aromatics

Benzene, Toluene, Xylene, Cunene

Note: Styrene is an aromatic and is treated as such for calculation purposes. (This is per API RP 581, page 3-50.)

Aluminum Trichloride

Aluminum Chloride

Pyrophoric

Pyrophoric Materials

Ammonia

Ammonia

Chlorine

Chlorine

Carbon Monoxide (CO)

Carbon Monoxide

Diethyl Ether

Diethyl Ether

Hydrogen Chloride (HCl)

Hydrogen Chloride

Nitric Acid

Nitric Acid

Nitrogen Dioxide

Nitrogen Dioxide

Phosgene

Phosgene

Toluene Diisocyanate (TDI)

Toluene Diisocyanate

Methanol

Methanol

Propylene Oxide

Propylene Oxide

Ethylene Glycol Monoethyl Ether Acetate

Ethylene Glycol Monoethyl Ether Acetate

Ethylene Glycol Monoethyl Ether

Ethylene Glycol Monoethyl Ether

Ethylene Glycol

Ethylene Glycol

Ethylene Oxide (EO)

Ethylene Oxide

 

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