# Clock Spring Company — Pipeline Safety Interpretation

**Citation:** PI-95-036  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1995-09-08

PI-95-036 response to Clock Spring Company concerning 192.713.

## Document text

<<<PAGE 1>>>

SR-95-085
U.S. Department 400 Seventh Street, SW
of Transportation Washington, DC 20590
Research and
Special Programs
Administration
September 8, 1995
Mr. Norm Block
Executive Vice President
Clock Spring Company
14107 Interdrive West
Houston TX 77032
Dear Mr. Block:
Thank you for your letter requesting clarification of the waiver published February 27, 1995, on the
repair of high-stress gas transmission lines (60 FR 10630).
You asked if the waiver requires monitoring of all repair sites. Site monitoring is the subject of the third
condition of the waiver. Under this condition, only a statistical sample of sites is to be excavated and
evaluated at 2-year intervals, consistent with a Gas Research Institute plan. The number of sites needed
for a statistically significant evaluation should be small compared with the total number of repair sites.
You also asked if pipe that is repaired by Clock Spring® wrap under the waiver must be replaced when it
becomes feasible to do so. The waiver exempts operators from complying with 49 CFR 192.713(a),
including the requirement to replace imperfect or damaged pipe if it is feasible to remove the line from
service. Therefore, pipe that is repaired under the waiver need not later be replaced to comply with
§192.713(a).
I trust you will find this information helpful. If you need further assistance, please let me know.
Sincerely,
Richard B. Felder
Associate Administrator
for Pipeline Safety
95-09-8c.doc 192.485, 192.713 (Waiver)
192.713 (Opinion)

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1995/PI95036.pdf>
- Source ID: `phmsa`
- SHA-256: `e54327242ed359d2f6f057b774cf6905421cd3266d399d1b9f19817cff2dba10`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T15:23:15.183Z
- Document slug: `phmsa-interpretation-pi-95-036`

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```