---
kind: "section"
citation: "46 C.F.R. § 162.161-4"
title: "46"
number: "162.161-4"
heading: "Construction."
url: "https://uscodex.org/cfr/46/162.161-4"
---

# §162.161-4. Construction.

- (a) Each pressure vessel must comply with 46 CFR [147.60(a)](/cfr/46/147.60.md?p=a) and [(b)](/cfr/46/147.60.md?p=b).
- (b) Each system must be capable of operation without an external power source.
- (c) Manual actuation for the system must be by mechanical or pneumatic means.
- (d) Automatically actuated systems must be released by pneumatic or fusible element detection systems.
- (e) Each system installed with the extinguishing agent cylinders stored inside a protected space of 6,000 cubic feet or less must use automatic actuation as the primary means of actuation and have a remote backup manual mechanical actuator.
- (f) Each container charged with nitrogen must have a pressure gauge.

## Notes

### Source

Source: USCG-2006-24797, 77 FR 33886, June 7, 2012, unless otherwise noted.

### Authority

Authority: 33 U.S.C. 1321(j), 1903; 46 U.S.C. 3306, 3703, 4104, 4302; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; E.O. 12777, 56 FR 54757, 3 CFR, 1991 Comp., p. 351; DHS Delegation 00170.1, Revision No. 01.4.