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

3-62 API RECOMMENDED PRACTICE 581
Chemical
Toluene
diisocyanate
(TDI)
Release
Duration
(Minutes)
Gas Release Constants
Liquid Release Constants
e f e f
3 N/A N/A 3,692.5 1.06
5 N/A N/A 3,849.2 1.09
10 N/A N/A 4,564.9 1.10
20 N/A N/A 4,777.5 1.06
40 N/A N/A 4,953.2 1.06
60 N/A N/A 5,972.1 1.03
1.5 3.819 1.171 N/A N/A
3 7.438 1.181 N/A N/A
Ethylene glycol
monoethyl ether
(EE)
5 17.735 1.122 N/A N/A
10 33.721 1.111 3.081 1.105
20 122.68 0.971 16.877 1.065
40 153.03 0.995 43.292 1.132
60 315.57 0.899 105.74 1.104
1.5 2.083 1.222 N/A N/A
3 12.32 1.207 N/A N/A
Ethylene oxide
(EO)
5 31.5 1.271 N/A N/A
10 185 1.2909 N/A N/A
20 926 1.2849 N/A N/A
40 4,563 1.1927 N/A N/A
60 7,350 1.203 N/A N/A
3 0.0019 1.913 N/A N/A
5 0.3553 1.217 10.055 1.198
Propylene oxide
10 0.7254 1.2203 40.428 1.111
20 1.7166 1.2164 77.743 1.114
40 3.9449 1.2097 152.35 1.118
60 4.9155 1.2522 1812.8 0.9855