46 CFR § 95.16-10 - Piping, fittings, valves, nozzles.
---
identifier: "/us/cfr/t46/s95.16-10"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 95.16-10 - Piping, fittings, valves, nozzles."
title_number: 46
title_name: "Shipping"
section_number: "95.16-10"
section_name: "Piping, fittings, valves, nozzles."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "I"
subchapter_name: "CARGO AND MISCELLANEOUS VESSELS"
part_number: "95"
part_name: "FIRE PROTECTION EQUIPMENT"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
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."
regulatory_source: "CGFR 65-50, 30 FR 17001, Dec. 30, 1965, unless otherwise noted."
cfr_part: "95"
---
# 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.