CFR > Title 46 - Shipping > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER O—CERTAIN BULK DANGEROUS CARGOES (parts 150 to 155) > PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES > SUBPART C—Design, Construction and Equipment (§154.170 to §154.1440) > 154.1115—Discharge.

154.1115—Discharge.

(a) The discharge density of each water spray system must be at least:
(1) 10000 cm 3 /m 2 /min. (0.25 gpm/ft. 2) over each horizontal surface; and
(2) 4000 cm 3 /m 2 /min. (0.10 gpm/ft. 2) against vertical surface, including the water rundown.
(b) The water spray protection under § 154.1110 (d) and (e) must cover an area in a horizontal plane extending at least 0.5 m (19 in.) in each direction from the pipes, fittings, and valves, or the area of the drip tray, whichever is greater.
(a) All locations on the above deck cargo area and the cargo piping outside that cargo area must be protected by:
(1) At least two dry chemical hand hose lines; or
(2) At least one dry chemical hand hose line and one dry chemical monitor.
(b) At least one dry chemical storage unit and hand hose line or monitor must be at the after end of the cargo areas.
(c) Each cargo loading and discharge manifold must be protected by at least one dry chemical monitor.
The coverage for the area for a hand hose line under § 154.1150 must not exceed the length of the hand hose line except the coverage for the protection of areas that are inaccessible to personnel must not exceed one-half the projection of the hose at its rated discharge, or 10 m (32.8 ft.), whichever is less.