Protocol Item C.01

1. external corrosion,
2. internal corrosion,
3. stress corrosion cracking;
4. manufacturing-related defects, including the use of low frequency electric resistance welded (ERW) pipe, lap welded pipe, flash welded pipe, or other pipe potentially susceptible to manufacturing defects [§192.917(e)(4) and ASME B31.8S-2004, Appendix A4.3];
5. welding- or fabrication-related defects,
6. equipment failures;
7. third party/mechanical damage [§192.917(e)(1)],
8. incorrect operations (including human error),
9. weather-related and outside force damage,
10. cyclic fatigue or other loading condition [§192.917(e)(2)],
11. all other potential threats.

If the operator is following the performance-based approach, verify that all 21 of the threats associated with the first nine failure categories listed above have been considered. [§192.917(a) and ASME B31.8S-2004, Section 2.2]

Verify that the operator's threat identification has considered interactive threats from different categories (e.g., manufacturing defects activated by pressure cycling, corrosion accelerated by third party or outside force damage) [ASME B31.8S-2004, Section 2.2].

Verify that the approach incorporates appropriate criteria for eliminating a specific threat for a particular pipeline segment. [ASME B31.8S-2004, Section 5.10]