PHMSA Gas Transmission (GT) Integrity Management
Time: 09/24/2014 02:24 AM

Rule Section: §192.941(b)

External Corrosion.

Rule Hierarchy:

Rule Language:

An operator must take one of the following actions to address external corrosion on the low stress covered segment.

(1) Cathodically Protected Pipe.

Cathodically Protected Pipe. To address the threat of external corrosion on cathodically protected pipe in a covered segment, an operator must perform an electrical survey (i.e. indirect examination tool/method) at least every 7 years on the covered segment. An operator must use the results of each survey as part of an overall evaluation of the cathodic protection and corrosion threat for the covered segment. This evaluation must consider, at minimum, the leak repair and inspection records, corrosion monitoring records, exposed pipe inspection records, and the pipeline environment.

(2) Unprotected Pipe or Cathodically Protected Pipe Where Electrical Surveys are Impractical.

Unprotected Pipe or Cathodically Protected Pipe Where Electrical Surveys are Impractical. If an electrical survey is impractical on the covered segment an operator must -
  1. Conduct leakage surveys as required by 192.706 at 4-month intervals; and
  2. Every 18 months, identify and remediate areas of active corrosion by evaluating leak repair and inspection records, corrosion monitoring records, exposed pipe inspection records, and the pipeline environment.

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