# Northern Illinois Gas — Pipeline Safety Interpretation

**Citation:** PI-93-017  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1993-04-22

PI-93-017 response to Northern Illinois Gas concerning 192.503.

## Document text

<<<PAGE 1>>>

April 22, 1993
Mr. Michael P. Hogan
Assistant Vice President and Chief Engineer
Northern Illinois Gas
P.O. Box 190
Aurora, IL 60507-0190
Dear Mr. Hogan:
I am responding to your letter of February 1, 1993, regarding the pressure testing requirements of
Subpart J or 49 CFR part 192. You asked us to confirm the following interpretation: "A tie-in or
replacement section of bare steel pipe to be operated at less than 100 psig is exempt from the
pressure testing of this Subpart if it does not include a field made butt-weld other than the 'final
tie-in joints'."
We have reviewed the pertinent part 192 standards but, unfortunately, cannot confirm your
interpretation. Steel pipe installed as a replacement to be operated at less than 100 psig is subject
to the pressure testing requirements of Subpart J.
Sincerely,
Cesar De Leon
Director, Regulatory Programs
Office of Pipeline Safety
dal\192\503\93-04-22

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1993/PI93017.pdf>
- Source ID: `phmsa`
- SHA-256: `e5e7c27350ba98b86a315080736060c55a0d2884ea6dc961e2aa3518cce0f744`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-23T02:22:02.840Z
- Document slug: `phmsa-interpretation-pi-93-017`

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