---
kind: "section"
citation: "46 C.F.R. § 59.15-1"
title: "46"
number: "59.15-1"
heading: "Furnace repairs."
url: "https://uscodex.org/cfr/46/59.15-1"
---

# §59.15-1. Furnace repairs.

- (a) Where corrugated or plain furnaces or flues are distorted by 1.5 inches or more, they must be repaired by either of the following methods:
  - (1) The furnace must be forced back to a true circular shape, and the Officer in Charge, Marine Inspection, may require strongbacks or other acceptable means of support to hold the furnace; or
  - (2) The furnace must be adequately stayed as determined by the Officer in Charge, Marine Inspection.
- (b) Distortion means the difference between any single measured diameter of the furnace and the diameter of a true circle at the same location.
- (c) Where the distortion does not exceed 1.5 inches it will not be necessary to force the furnace back to a true circle if the allowable pressure is reduced in the ratio of 1.5 percent for each one-tenth of an inch of distortion. However, if the maximum distortion does not exceed 1 inch, the repairs or reduction in pressure will not be required unless considered necessary by the marine inspector.
- (d) When it becomes necessary to rivet a patch to a furnace or other part of the heating surface, the riveted patch must be placed on the waterside of the plate in order not to form a pocket in which sediment may collect.
- (e) Furnace crowns which have become distorted, not in excess of the limitations provided in [paragraph (c)](#c) of this section, may be repaired by forcing back the distorted section to as nearly a true circle as possible and reinforcing the same by means of a ring, arc- or gas-welded to the distorted corrugation as shown in figure 1 to § 59.15-1, the welding to be done by welders and welding processors qualified in accordance with [part 57](/cfr/46/part57.md) of this subchapter.

## Notes

### Authority

Authority: 46 U.S.C. 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 227; Department of Homeland Security Delegation No. 00170.1, Revision No. 01.3.

### Source

Source: CGFR 68-82, 33 FR 18887, Dec. 18, 1968, as amended by USCG-2020-0634, 89 FR 50183, June 12, 2024, unless otherwise noted.