# Purging.

**Citation:** 49 CFR 193.2517  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

When necessary for safety, components that could accumulate significant amounts of combustible mixtures must be purged in accordance with a procedure which meets the provisions of the “Purging Principles and Practices (incorporated by reference, see § 193.2013)” after being taken out of service and 

## Document text

When necessary for safety, components that could accumulate significant amounts of combustible mixtures must be purged in accordance with a procedure which meets the provisions of the “Purging Principles and Practices (incorporated by reference, see § 193.2013)” after being taken out of service and before being returned to service.

[Amdt. 193-2, 45 FR 70405, Oct. 23, 1980, as amended by Amdt. 193-25, 80 FR 183, Jan. 5, 2015]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-193.2517>
- Source ID: `ecfr`
- SHA-256: `154e8c793bd0fc924dbd2a7a75529ef0d2e61bfebfaf7c2fc7aa553d0cd17875`
- Retrieved: 2026-08-20T05:54:35.243Z
- Exported: 2026-08-23T13:10:04.479Z
- Document slug: `49-cfr-193-2517`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "193",
  "section": "193.2517",
  "subpart": "Subpart F—Operations",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```