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

2.B-90 API RECOMMENDED PRACTICE 581
Table 2.B.11.5—Temperature Adjustment Factor, F T , as a Function of the Operating Temperature
Operating Temperature (°F)
°C °F
F T for Closed Systems
F T for Open Systems
24 75 0.1 0.1
27 80 0.3 0.3
29 85 0.4 0.4
32 90 0.6 0.6
35 95 0.8 0.8
38 100 0.9 0.9
41 105 1.1 1.1
43 110 1.2 1.2
46 115 1.4 1.4
49 120 1.6 1.6
52 125 1.7 1.7
54 130 1.9 1.9
57 135 2.1 2.1
60 140 2.2 2.2
63 145 2.4 2.4
66 150 2.5 2.5
68 155 2.7 2.7
71 160 2.9 2.9
74 165 3.0 3.0
77 170 3.2 3.2
79 175 3.4 3.3
82 180 3.5 3.3
85 185 3.7 3.3
88 190 3.8 3.3
91 195 4.0 3.1
93 200 4.2 2.9
41 105 4.3 2.5
99 210 4.5 1.7