---
kind: "section"
citation: "46 C.F.R. § 63.25-7"
title: "46"
number: "63.25-7"
heading: "Exhaust gas boilers."
url: "https://uscodex.org/cfr/46/63.25-7"
---

# §63.25-7. Exhaust gas boilers.

- (a) **Construction.** An auxiliary exhaust gas boiler must meet the applicable construction requirements of [part 52](/cfr/46/part52.md) or [part 53](/cfr/46/part53.md) of this subchapter as determined from table 1 to [§ 54.01-5](/cfr/46/54.01-5.md) of this subchapter.
- (b) **Controls.** Each drum type exhaust gas steam boiler must have a feed water control system. The system must automatically supply the required amount of feed water and maintain it at the proper level. For boilers without a fixed water level, the control system must supply the feed water at a rate sufficient to ensure proper heat transfer. The system must adequately fill the boiler when cold.
- (c) **Alarms.** When a condition arises which results in inadequate heat transfer, a high temperature alarm or low flow alarm must be activated. An audible alarm must automatically sound, and a visual indicator must indicate when the fluid temperature exceeds the maximum operating temperature or when the fluid/steam flowing through the heat exchanger is insufficient to ensure proper heat transfer. Additionally, an audible alarm must automatically sound, and a visual indicator must indicate when a soot fire is present in the exhaust gas boiler's uptake.

## Notes

### Amendments

[CGD 88-057, 55 FR 24237, June 15, 1990, as amended by USCG-2020-0634, 89 FR 50198, June 12, 2024]

### Authority

Authority: 46 U.S.C. 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; Department of Homeland Security Delegation No. 00170.1, Revision No. 01.3.

### Source

Source: CGD 88-057, 55 FR 24238, June 15, 1990, unless otherwise noted.

### Amendments

[CGD 88-057, 55 FR 24237, June 15, 1990, as amended by USCG-2020-0634, 89 FR 50198, June 12, 2024]