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Regulation and Records

Test records retained for the life of the pipeline

The pressure test lasts a day. The record lasts as long as the pipeline does, and it is the only part anyone will ever look at again.

The requirement

49 CFR 192.517 for gas and 195.310 for hazardous liquids require records of pressure tests to be retained for the useful life of the pipeline.

“Useful life” is the phrase that catches people. Not a retention period in years — for as long as the asset exists, which may be several decades and several owners.

What belongs in it

  • The test pressures, hold durations and the times they were achieved
  • The pressure and temperature traces, not just summary figures
  • Instrument identification and calibration certificates, serial numbers matching the equipment used
  • The test medium, and the fill and environmental conditions
  • The segment identification, including the pipe and fittings within it
  • The acceptance criteria applied and the analysis supporting acceptance
  • Who witnessed and who accepted, with dates

Why the analysis belongs in the record

A record showing a pressure that fell slightly, with no analysis, is a problem waiting for a future integrity engineer. A record showing the same decay alongside the predicted thermal response and the resulting residual is evidence of a considered acceptance.

The second one answers the question. The first one starts one, years later, when nobody involved is available.

Format outlives software

Records that must survive decades should not depend on a proprietary format or a vendor’s portal. Traces exported to open formats, with a readable summary document, outlive the loggers that produced them.

Specify the deliverableSay in the contract what records you will receive, in what format, and when. A contractor whose deliverable is a signed one-page certificate has not met the obligation you are actually under.

Ownership changes

Pipelines get sold. The record has to be transferable and comprehensible to somebody who was not there, working for a company that did not own the asset at the time.

That is the test to apply when deciding whether a record is complete: could a competent stranger reconstruct what was done and why it was accepted?

Standing noteThis is educational reference material, not engineering advice. Regulations are revised continually; the editions in force at the time of a project govern, and every project requires its own qualified engineering analysis and the operator’s governing specifications.
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