. Packing house and cold storage construction; a general reference work on the planning, construction and equipment of modern American meat packing plants, with special reference to the requirements of the United States government, and a complete treatise on the design of cold storage plants, including refrigeration, insulation and cost data .. . me necessary to makeexcavations for an adjoining building and it was then foundthat the ground was frozen for 17 feet below the bottomof the tank. In Figure 118 is illustrated the laying of cork under anice freezing tank. Pipe Covering Brine headers s
. Packing house and cold storage construction; a general reference work on the planning, construction and equipment of modern American meat packing plants, with special reference to the requirements of the United States government, and a complete treatise on the design of cold storage plants, including refrigeration, insulation and cost data .. . me necessary to makeexcavations for an adjoining building and it was then foundthat the ground was frozen for 17 feet below the bottomof the tank. In Figure 118 is illustrated the laying of cork under anice freezing tank. Pipe Covering Brine headers should be insulated when they run out-side of cold storage rooms, otherwise their efficiency ispartly lost in conveying the chilled brine to the cold storagerooms. It is also necessary to insulate the ammonia gasheaders from the rooms back to the machine. The usual method of insulating is to put on a sectionalcovering of cork or hair felt, which can be obtained in INSULATION 193 sizes to fit any diameter of pipe and fitting. Care sliouldbe exercised in applying the insulation; small air leaksmean rapid destruction of the insulation at that the outside air comes in contact with the cool pipeit deposits moisture which freezes on the pipe and the iceforming under the insulation will, in a short time, force thecovering off FIG. 118—LAYING CORK INSULATION UNDER FREEZING TANK. The hangers should be applied on the outside of thecovering and there should always be a piece of galvanizedsheet iron next to the insulation. If the hanger touchesthe pipe, the covering becomes damp around it, due toprecipitation of pioisture from the air, which, in time, issure to ruin that section. When the piping is being putup before the covering can be applied, it is always best toput the hanger around a block of wood of the same thick- 194 INSULATION ness as the covering and remove the wood as the pipes arecovered. Cork covering for brine and ammonia headers is madefrom one to four
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