# Northern Illinois Gas — Pipeline Safety Interpretation

- **operation:** document
- **citation:** PI-93-017
- **title:** Northern Illinois Gas — Pipeline Safety Interpretation
- **source type:** guidance
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** guidance
- **official:** true
- **published on:** 1993-04-22
- **effective on:** Not available
- **summary:** PI-93-017 response to Northern Illinois Gas concerning 192.503.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-93-017.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-93-017.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-93-017
- **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1993/PI93017.pdf
**body:**

<<<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
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