128.420—Keel cooler installations.
(a)
Except as provided by this section, each keel cooler installation must comply with § 56.50-96 of this chapter.
(b)
Approved metallic flexible connections may be located below the deepest-load waterline if the system is a closed loop below the waterline and if its vent is located above the waterline.
(c)
Fillet welds may be used in the attachment of channels and half-round pipe sections to the bottom of the vessel.
(d)
Short lengths of approved non-metallic flexible hose fixed by metallic or non-metallic hose-clamps may be used at machinery connections if—
(3)
Two of the clamps are used on each end of the hose, except that one clamp may be used on an end expanded or beaded to provide a positive stop against hose slippage.
[CGD 82-004 and CGD 86-074, 62 FR 49331, Sept. 19, 1997, as amended by USCG-2000-7790, 65 FR 58463, Sept. 29, 2000]