# Gray & Ductile Iron Founders — Pipeline Safety Interpretation

**Citation:** PI-71-053  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1971-04-08

PI-71-053 response to Gray & Ductile Iron Founders concerning 192.145.

## Document text

<<<PAGE 1>>>

Mr. Charles F. Walton
Technical Director
Gray & Ductile Iron Founders
Society Inc.
East Sixty Building
Cleveland, Ohio 44114
Dear Mr. Walton:
This is in reply to your letter of March 24, 1971, inquiring as to the reason why particular aspects
of ductile iron valve manufacture and use were selected for regulation.
The requirements of the Federal Minimum Safety Standards relating to the use of welding on
ductile iron shell components in valves, were an adoption, in regulatory language of the existing
provisions of the ANSI B31.8 Code, 1968 edition, and in this area did not increase the
requirements of the code.
Your letter of December 18, 1970, has been viewed as a request for the initiation of rulemaking,
and accordingly, your proposal for the amendment of the regulations concerning the manufacture
of valves for gas transmissions, is now under active consideration. We will be happy to keep you
informed of any developments in this matter.
If we can be of further assistance, please let us know.
Sincerely,
/signed/
Joseph C. Caldwell
Acting Director
Office of Pipeline Safety
DB
C:\WP51\INTERPRT\192\145\71-04-08
1

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1971/PI71053.pdf>
- Source ID: `phmsa`
- SHA-256: `d51c2c3dc04d72de624caa4d31a37b4acf27d36f453b3277a2cb0e4c63c69c6f`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T23:18:39.747Z
- Document slug: `phmsa-interpretation-pi-71-053`

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