---
kind: "section"
citation: "46 C.F.R. § 95.16-10"
title: "46"
number: "95.16-10"
heading: "Piping, fittings, valves, nozzles."
url: "https://uscodex.org/cfr/46/95.16-10"
---

# §95.16-10. Piping, fittings, valves, nozzles.

- (a) Piping, fittings, and valves must be:
  - (1) In accordance with the manufacturer's approved design, installation, operation, and maintenance manual;
  - (2) Securely supported and when necessary protected against damage;
  - (3) Protected inside and out against corrosion; and
  - (4) **Equipped with—**
    - (i) Dead end lines (dirt traps) that extend at least 2 inches beyond the last nozzle of each distribution line and that are closed with a cap or plug; and
    - (ii) Drains and dirt traps, fitted where necessary to prevent dirt or moisture accumulation and located in accessible locations where possible.
- (b) **Piping requirements.** Piping must be:
  - (1) Used exclusively for extinguishing system purposes;
  - (2) Protected by a pressure relief valve in sections where gas pressure can be trapped between closed valves; and
  - (3) **Welded if it passes through living quarters.**
- (c) **Piping prohibitions.** Piping must not:
  - (1) Use rolled groove or cut groove ends; or
  - (2) **Be fitted with drains or other openings if it passes through living quarters.**
- (d) **Valve requirements.** Valves for system operation must be:
  - (1) Outside the protected space, and
  - (2) **Marked, if serving a branch line, to indicate the space the branch line serves.**
- (e) **Valve prohibitions.** Valves may not be located in any space that could be cut off from the operator in the event of fire in the protected space.

## Notes

### Source

Source: USCG-2006-24797, 77 FR 33879, June 7, 2012, unless otherwise noted.

### Authority

Authority: 46 U.S.C. 3306; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation No. 00170.1, Revision No. 01.4.

### Source

Source: CGFR 65-50, 30 FR 17001, Dec. 30, 1965, unless otherwise noted.