# Memo: Internal — Pipeline Safety Interpretation

**Citation:** PI-93-021  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1993-05-10

PI-93-021 response to Memo: Internal concerning 195.402.

## Document text

<<<PAGE 1>>>

TO: Richard Sanders 5/10/93
FROM: Cesar (DeLeon)
Failure Safety System - A system designed so that failure of power, control circuits, structural
members, or other components will not endanger people operating the system or other people in
the vicinity.
Page 692 of McGraw-Hill Dictionary of Scientific and Technical Terms-4th Edition.
dal\195.402\93-05-10.doc

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1993/PI93021.pdf>
- Source ID: `phmsa`
- SHA-256: `76ff7dcad7fbce6ab0405f831a422fe75c03fb505605a1f835d1c370f0651745`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T23:07:39.909Z
- Document slug: `phmsa-interpretation-pi-93-021`

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