# Memo: Internal — Pipeline Safety Interpretation

**Citation:** PI-91-023  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1991-07-22

PI-91-023 response to Memo: Internal concerning 192.515.

## Document text

<<<PAGE 1>>>

SECTION: 192.515
INFORMATION: Applicability of Part 192 to insure environmental protection and safety
requirements
FROM:Cesar De Leon, DPS-10 7/22/91
TO: Interpretation Files
Facts: On July 27, 1990, a contractors' employee was fatally injured during the pressure testing
of 36" pipeline, operated by Trunkline Gas Company. The employee was injured when he opened
a 2" Apollo ball valve installed on a test header. The Valve was part of the test header piping
connecting the test header to the pressure pump. The contractor had completed the low pressure
test and was in the process of beginning the higher pressure test on this section of the pipeline.
The Apollo Valve that failed indicates that the 1500 Pig Rated Valve failed under an approximate
pressure of 1200 Pig. The metallurgical report indicates that the valve failed by overload and that
intergranular fracture was a contributing factor.
Question: of these valves?
Is this incident subject to OPS jurisdiction? Are there any other failures reported
Interpretation: Section 192.515 does apply to this situation. I do not know of other failures of
these valves. OPS does have jurisdiction over this incident. This is not a reportable accident
because it did not involve a release of gas as per Section 191.3.
DB
C:\WP51\INTERPRT\192\515\91-07-22
1

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1991/PI91023.pdf>
- Source ID: `phmsa`
- SHA-256: `0ff73d1ac662870e9a05252eb865c84b6a7f62348036bdeb59abeef9e5d374a4`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T02:15:05.158Z
- Document slug: `phmsa-interpretation-pi-91-023`

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