- (a) A keel cooler installation used for engine cooling must be designed to prevent flooding.
- (b) Except as provided in paragraph (e), a shutoff valve must be located where the cooler piping penetrates the shell, as near the shell as practicable, except where the penetration is forward of the collision bulkhead.
- (c) The thickness of the inlet and discharge connections, outboard of the shutoff valves required by paragraph (b) of this section, must be at least Schedule 80.
- (d) Short lengths of approved nonmetallic flexible hose, fixed by two hose clamps at each end of the hose, may be used at machinery connections for a keel cooler installation.
(e) Shutoff valves are not required for integral keel coolers. A keel cooler is considered integral to the hull if the following conditions are satisfied:
- (1) The cooler structure is fabricated from material of the same thickness and quality as the hull;
- (2) The flexible connections are located well above the deepest subdivision draft;
- (3) The end of the structure is faired to the hull with a slope no greater than 4 to 1; and
- (4) Full penetration welds are employed in the fabrication of the structure and its attachment to the hull.
[CGD 85-080, 61 FR 986, Jan. 10, 1996, as amended by USCG-2000-7790, 65 FR 58465, Sept. 29, 2000]