# Valves.

**Citation:** 49 CFR 193.2123  
**Type / status:** regulation / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 1999-10-01  
**Published:** Not stated

(a) Each valve, including control valves and relief valves, must be designed, manufactured, and tested to comply with ASME/ANSI B31.3 or ASME/ANSI B31.5 or ASME/ANSI B31.8 or API Standard 6D, if design conditions fall within their scope.

(b) Extended bonnet valves must be used for service temperatu

## Document text

(a) Each valve, including control valves and relief valves, must be designed, manufactured, and tested to comply with ASME/ANSI B31.3 or ASME/ANSI B31.5 or ASME/ANSI B31.8 or API Standard 6D, if design conditions fall within their scope.

(b) Extended bonnet valves must be used for service temperatures below −45.6° C (−50° F).

(c) Valves used for cryogenic liquid service must be designed to operate in the position in which they are installed.

(d) Powered local and remote operation must be provided for valves intended for use during a controllable emergency that would be difficult or excessively time-consuming to operate manually during such an emergency.

(e) Valves must be designed and installed so that an excessive load on the piping system does not render the valve inoperable.

[45 FR 9203, Feb. 11, 1980, as amended by Amdt. 193-1, 45 FR 57419, Aug. 28, 1980; 58 FR 14522, Mar. 18, 1993]

## Provenance

- Official: Yes
- Source: <https://www.govinfo.gov/app/details/CFR-1999-title49-vol3/CFR-1999-title49-vol3-sec193-2123>
- Source ID: `govinfo-cfr`
- SHA-256: `e81b75d12f5dbb37d21f14f0600c738876203ff67d7ac8d12db470aeb62554a2`
- Retrieved: 2026-08-12T01:41:23.231Z
- Exported: 2026-08-24T03:52:48.148Z
- Document slug: `49-cfr-193-2123`

### Source metadata

```json
{
  "part": "193",
  "section": "193.2123",
  "subpart": "Subpart C—Design",
  "annualEdition": 1999,
  "revisedAsOf": "1999-10-01",
  "govInfoPackage": "CFR-1999-title49-vol3",
  "legalStatus": "official-annual-cfr-edition",
  "effectiveDateNote": null,
  "historicalAnchor": true,
  "historicalAnchorNote": "The section appears in an official annual CFR edition but is absent from the connected current eCFR corpus.",
  "jurisdiction": "US"
}
```