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

2-46 API RECOMMENDED PRACTICE 581
Table 6.3—SCC DFs—All SCC Mechanisms
Inspection Effectiveness
S VI
E
1 Inspection 2 Inspections 3 Inspections
D C B A D C B A D C B A
0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1 1 1 1
10 10 8 3 1 1 6 2 1 1 4 1 1 1
50 50 40 17 5 3 30 10 2 1 20 5 1 1
100 100 80 33 10 5 60 20 4 1 40 10 2 1
500 500 400 170 50 25 300 100 20 5 200 50 8 1
1000 1000 800 330 100 50 600 200 40 10 400 100 16 2
5000 5000 4000 1670 500 250 3000 1000 250 50 2000 500 80 10
Inspection Effectiveness
S VI
E
4 Inspections 5 Inspections 6 Inspections
D C B A D C B A D C B A
0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1 1 1 1
10 10 2 1 1 1 1 1 1 1 1 1 1 1
50 50 10 2 1 1 5 1 1 1 1 1 1 1
100 100 20 5 1 1 10 2 1 1 5 1 1 1
500 500 100 25 2 1 50 10 1 1 25 5 1 1
1000 1000 200 50 5 1 100 25 2 1 50 10 1 1
5000 5000 1000 250 25 2 500 125 5 1 250 50 2 1