Topic: External Corrosion Direct Assessment (ECDA)

Topic Hierarchy:

Related Rule Sections:

Related Protocol Questions:

D.02 ECDA Pre-Assessment

Verify that the ECDA Pre-assessment process complies with ASME B31.8S-2004, Section 6.4 and NACE RP0502-2002 to (1) determine if ECDA is feasible for the pipeline to be evaluated, (2) identify ECDA regions and (3) select Indirect Inspection Tools. [§192.925(b)(1)]

D.03 ECDA Indirect Examination

Verify that the ECDA Indirect Examination process complies with ASME B31.8S-2004, Section 6.4 and NACE RP0502-2002, Section 4 to identify and characterize the severity of coating fault indications, other anomalies, and areas at which corrosion activity may have occurred or may be occurring, and establish priorities for excavation. [�192.925(b)(2)]

D.04 ECDA Direct Examination

Verify that the ECDA Direct Examination process complies with ASME B31.8S-2004, Section 6.4 and NACE RP0502-2002, Section 5 to collect data to assess corrosion activity and remediate defects discovered. [NACE RP0502-2002, Section 5.1.1 and §192.925(b)(3)]

D.05 ECDA Post-Assessment

Verify that the ECDA Post assessment process complies with ASME B31.8S-2004, Section 6.4 and NACE RP0502-2002, Section 6, to (1) define reassessment intervals and (2) assess the overall effectiveness of the ECDA process. [§192.925(b)(4) and §192.939]