How may Confirmatory Direct Assessment (CDA) be used?

§ 192.931 How may Confirmatory Direct Assessment#

(CDA)be used? An operator using the confirmatory direct assessment#

(CDA)method as allowed in § 192.937 must have a plan that meets the requirements of this section and of § 192.925#

(ECDA)and § 192.927 (ICDA).#

(a)Threats. An operator may only use CDA on a covered segment to identify damage resulting from external corrosion or internal corrosion.#

(b)External corrosion plan. An CDA plan for identifying external corrosion must comply with § 192.925 with the following exceptions.#

(1)The procedures for indirect examination may allow use of only one indirect examination tool suitable for the application.#

(2)The procedures for direct examination and remediation must provide that#

(i)All immediate action indications must be excavated for each ECDA region; and#

(ii)At least one high risk indication that meets the criteria of scheduled action must be excavated in each ECDA region.#

(c)Internal corrosion plan. An operator's CDA plan for identifying internal corrosion must comply with § 192.927 except that the plan's procedures for identifying locations for excavation may require excavation of only one high risk location in each ICDA region.#

(d)Defects requiring near-term remediation. If an assessment carried out under paragraph#

(b)or#

(c)of this section reveals any defect requiring remediation prior to the next scheduled assessment, the operator must schedule the next assessment in accordance with NACE SP0502 (incorporated by reference, see § 192.7), section 6.2 and 6.3. If the defect requires immediate remediation, then the operator must reduce pressure consistent with § 192.933 until the operator has completed reassessment using one of the assessment techniques allowed in § 192.937.#