# President Carboline Company — Pipeline Safety Interpretation

**Citation:** PI-73-028  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1973-10-12

PI-73-028 response to President Carboline Company concerning 192.461.

## Document text

<<<PAGE 1>>>

Mr. Stanley L. Lopata
President Carboline Company
328 Hanley Industrial Court
St. Louis, MO 63144
Dear Mr. Lopata:
This is in response to your letter of August 28, 1973, to the National Transportation Safety Board
which was referred to this Office for a reply. Your letter was concerning to Exxon Corporation
pipeline failure near Hearne, Texas, due to corrosion. You offered some suggestions regarding
pipeline coatings which you think would prevent an occurrence of a similar situation.
The Federal regulations basically require that liquid pipelines installed after April 1, 1970, and gas
pipelines installed after July 31, 1971, be coated and cathodically protected to a certain level of
protection and annually monitored to assure the maintenance of that level of protection.
The choice of a coating or coating combination is left up to the user. A pipeline carrying
hazardous materials and petroleum products in liquid form must comply with external coating
requirements contained on Section 195.238. A gas carrying pipeline must comply with similar
coating requirements contained in Section 192.461. Enclosed for your information is a copy of
Federal liquid and gas regulations.
I trust this explains our position as related to pipeline coatings. If you have any further questions,
please feel free to contact me.
Sincerely,
/signed/
Joseph C. Caldwell
Director
Office of Pipeline Safety
DB
C:\WP51\INTERPRT\192\461\73-10-12
1

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1973/PI73028.pdf>
- Source ID: `phmsa`
- SHA-256: `0e63dc152f6ad3bcbc9ed689ccfd37f404ecef8bc8da6ef9d82f267a979ccc3e`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T19:48:16.573Z
- Document slug: `phmsa-interpretation-pi-73-028`

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