| Tweet |
Custom Search
|
|
|
||
 TB 740-97-4
APPENDIX V
DYNAMIC DEHUMIDIFICATION INSTRUCTIONS FOR
VESSEL, LIQUID CARGO, 182-FOOT
DESIGNS 294 AND 294AB
1. General. This appendix provides detailed instructions for preparation of vessel, liquid cargo, designs 294 and 294AB, for
dynamic dehumidification.
2. Preparation Instructions. a. Disassembly and stowage.
(1) Pilothouse. The following items will be removed, identified, and stowed in the pilothouse:
(a) Searchlights.
(b) Signal lights.
(c) Running lights--including towing, range, anchor, and breakdown.
(d) Binnacle and stand.
(e) Windshield wipers and motors.
(f) Halyards.
(2) Crew quarters. The following items will be removed, identified, and stowed in the crew quarters:
(a) Bunks.
(b) Lockers.
(c) Radar Antennas.
(3) Forecastle Deck Storage Locker. The following items will be removed and stowed in the forecastle locker:
(a) Door dogs.
(b) Deck keys.
(c) Canvas.
(d) Canvas covers.
(e) Fire monitors and valves
(f) Port hole screens.
(g) Lifeboat blocks and falls.
(h) Fire hose.
(i) Cargo boom rigging.
(4) Dry Cargo Hold. The following items will be removed and stowed in the dry cargo hold:
(a) Oars.
(b) Boat hooks.
(c) Cargo davits.
(d) Cowling vents.
(e) Life floats.
(5) Lifeboats. The lifeboats and float-away rafts will be stowed on the boat deck, The lifeboats will be inverted and stowed
in supports of sufficient height to hold the boat clear of the deck. The supports will be distributed to minimize stresses on the boat.
The grips will be used to hold the lifeboat in place.
b. Methods of dynamic dehumidification. Outlined below are two methods of preparing the liquid cargo vessel for dynamic
dehumidification. Either method is acceptable.
(1) Method A Method. A utilizes a rotary electric dehumidifier, 150,000 cubic foot capacity, and uses the fire main as the
carrier for transferring the dry air throughout the vessel. This single machine will dehumidify the entire vessel except the liquid cargo
tanks and dry cargo hold.
(2) Method B. Method B utilizes a minimum of eight package dehumidifiers, single desiccant bed, 10,000 cubic foot
capacity, to dehumidify the vessel. Under this method, the vessel is dehumidified by zones consisting of specific areas of the vessel
Like Method A, all areas of the vessel, except the liquid cargo tanks and the dry cargo hold, are under dehumidification.
c. Preparation for dynamic dehumidification for Method A.
(1) Dehumidified area. The entire interior of the vessel, except the liquid cargo tanks, dry cargo hold, and coffer dam will be
prepared for dynamic dehumidification.
(2) Provisions for air circulation. To permit maximum circulation of air within the dehumidified zone, the escape hatch from
the engineroom, passageways to the main deck will be left open. All doors, to the officers' mess, crew's mess, meat and vegetable
lockers, mate's and crew's lavatory, and seaman's and gunner's quarters will be secured in an open position. Passageway to the top
deck will be left open. All doors leading into the radio chart room, pilot house, sick bay, captain's, chief engineer's, and radio
operator's room will be secured in an open position. The ammunition storage paint and lamp locker, windlass and forepeak castle
will be placed under dynamic dehumidification.
(3) Sealing for dehumidification. Methods and materials used for sealing for dehumidification will be in accordance with this
bulletin.
V-1
|
||
|
||
