1 Refrigerating systems are divided into classes, descriptive of the method employed for extracting heat as follows: Direct system is one in which the evaporator is in direct contact with the material or space refrigerated or is located In air circulating passages communicating with such spaces. Indirect system is one in which a liquid, such as brine or water cooled by the refrigerant, is circulated to the material or space refrigerated or is used to cool air so circulated. Unit system is one which has been assembled and tested prior to its installation and which is installed with refrigerant containing parts completely assembled. Reserve supply of refrigerant may be stowed in any cool, isolated location (excepting a cargo hold, or passenger or crew spaces) on board the vessel. Racks shail be provided and the containers secured therein. Valve protection cap shall be in place on cylinders. Pressure may be as high as 2,280 lbs. per square inch at 180° F. Accept in DOT cylinders only. Dichlorodifluoromethane.. Vapors very much heavier than air. Non-poisonous. Non-inflammable. Excessive quantities in an enclosed space may cause suffocation. Odorless. Decomposes when passed through flames evolving hydrochloric and hydrofluoric acid fumes which are toric. Pressure about 180 lbs. at 130° F. Vapors very much heavier than air. Decomposes when passed through flames evolving hydrochloric and hydrofluoric acid fumes which are toric. Pressure about 12.8 lbs. at 70° F. Practically non-inflammable. Vapors very much heavier than air. Toric in concentrations above 2.5% upon exposure for more than 2 hours. Odorless. Decomposes when passed through flames evolving hydrochloric and hydrofluoric acid fumes which are toric. Pressure about 8.5 lbs. at 70° F. Vapors very much heavier than air. Decomposes when passed through flames evolving hydrochloric and hydrofluoric acid fumes which are toric. Pressure minus 1-3 lbs. gauge at 70° F. Pressure about 24 lbs. at 150° F. Vapors very much heavier than air. Green gas.. Permitted... A metallic case containing The hazard of such cartridges is Protect from fire. Distress signal rockets.. Rockets or shells throwing No label required. Stowage: Vessel's portable maga zine chest. No label required. Stowage: In place in the emer gency and motor lifeboats. Additional flares may be stowed in a location discretionary with the master. No label required. Stowage: Vessel's portable maga No label required. zine chest. Container: Metal cans having watertight top closing means. Stowage: Vessel's portable maga- Container: The container shall be No label required. Stowage: In place attached to ring 1 Container: A watertight metal case constructed of copper of not less than No. 22 B. W. G. thickness, seams lock ointed and soldered. The cover or top may be of cast brass not less than 34" thickness, or of reinforced copper, and shall have a fitted gasket together with threaded means, clamps or dogs to provide a W. T. seal (Bayonet type closing means not permitted). The cover shall be easily removable without recourse to tools. The case shall have a capacity of not less than 6 rockets. Containers: The container shall be constructed of 18-ounce, or No. 22 B. W G. copper, or equal noncorrodible metal, lock-jointed and soldered, the bottom to be rolled in and soldered. The cover or top of cast brass not less than 16-inch in thickness and 5 inches in diameter shall be so constructed as to be easily removed, and made watertight by a fitted rubber gasket. |