---
kind: "section"
citation: "46 C.F.R. § 108.437"
title: "46"
number: "108.437"
heading: "Pipe sizes and discharge rates for enclosed ventilation systems for rotating electrical equipment."
url: "https://uscodex.org/cfr/46/108.437"
---

# §108.437. Pipe sizes and discharge rates for enclosed ventilation systems for rotating electrical equipment.

- (a) The minimum pipe size for the initial charge must meet table 108.441 and the discharge of the required amount of CO2 must be completed within 2 minutes.
- (b) The minimum pipe size for the delayed discharge must be at least 1.25 centimeters ( 1/2 inch) standard pipe.
- (c) The pipe used for the initial discharge must not be used for the delayed discharge, except systems having a volume of less than 57 cubic meters (2,000 cubic feet).

## Notes

### 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.