---
kind: "section"
citation: "46 C.F.R. § 108.451"
title: "46"
number: "108.451"
heading: "CO 2 storage."
url: "https://uscodex.org/cfr/46/108.451"
---

# §108.451. CO 2 storage.

- (a) Except as provided in [paragraph (b)](#b) of this section, each cylinder of a CO2 system must be outside each space protected by the system and in a location that would be accessible if a fire occurred in any space protected by the system.
- (b) A CO2 system that has a CO2 supply of 136 kilograms (300 pounds) or less may have one or more cylinders in the space protected by the system if the space has a heat detection system to activate the system automatically in addition to the remote and manual controls required by this subpart.
- (c) Each space that contains cylinders of a CO2 system must be ventilated and designed to prevent an ambient temperature of more than 54 °C. (130 °F.)
- (d) Each cylinder in a CO2 system must be securely fastened, supported, protected from damage, in an accessible location, and capable of removal from that location.
- (e) Each unit must have a means for weighing cylinders of a CO2 system.
- (f) A cylinder in a CO2 system may not be mounted in a position that is inclined more than 30° from a vertical position, except that a cylinder having flexible or bent siphon tubes may be mounted in a position that is inclined up to 80° from the vertical. The bottom of each cylinder when mounted must be at least 5 centimeters (2 inches) from the deck.
- (g) If a cylinder does not have a check valve on its independent cylinder discharge, it must have a plug or cap to close the outlet when the cylinder is moved.

## Notes

### Amendments

[CGD 73-251, 43 FR 56808, Dec. 4, 1978, as amended by CGD 84-044, 53 FR 7749, Mar. 10, 1988]

### Authority

Authority: 43 U.S.C. 1333; 46 U.S.C. 3102, 3306; DHS Delegation No. 00170.1, Revision No. 01.4.

### Source

Source: CGD 73-251, 43 FR 56808, Dec. 4, 1978, unless otherwise noted.

### Amendments

[CGD 73-251, 43 FR 56808, Dec. 4, 1978, as amended by CGD 84-044, 53 FR 7749, Mar. 10, 1988]