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

2-40 API RECOMMENDED PRACTICE 581
Table 5.3—Data Required for Determination of the Lining DF
Type of lining
Required Data
Age of lining (years)
Comments
See Table 5.4 and Table 5.5, as applicable
Age of lining, or years since last A or B effective inspection (i.e. since last
thorough visual inspection or other appropriate method)
Lining condition Condition of lining based on Table 5.6
On-line monitoring for lining failure
On-line monitoring
Damage factor Thinning DF determined as in Section 4
Table 5.4—Lining DFs—Inorganic Linings
Years Since
Last
Thorough
Visual
Inspection
Strip Lined
Alloy
(Resistant)
Castable
Refractory
DF As a Function of Inorganic Lining Type
Castable
Refractory
Severe
Conditions
Glass Lined Acid Brick Fiberglass
1 0.3 0.5 9 3 0.01 1
2 0.5 1 40 4 0.03 1
3 0.7 2 146 6 0.05 1
4 1 4 428 7 0.15 1
5 1 9 1017 9 1 1
6 2 16 1978 11 1 1
7 3 30 3000 13 1 2
8 4 53 3000 16 1 3
9 6 89 3000 20 2 7
10 9 146 3000 25 3 13
11 12 230 3000 30 4 26
12 16 351 3000 36 5 47
13 22 518 3000 44 7 82
14 30 738 3000 53 9 139
15 40 1017 3000 63 11 228
16 53 1358 3000 75 15 359
17 69 1758 3000 89 19 548
18 89 2209 3000 105 25 808
19 115 2697 3000 124 31 1151
20 146 3000 3000 146 40 1587
21 184 3000 3000 170 50 2119
22 230 3000 3000 199 63 2743
23 286 3000 3000 230 78 3000
24 351 3000 3000 266 97 3000
25 428 3000 3000 306 119 3000