Document zQqEXJqRZyJkvaNX1apooqK77

^ Am. Soc. of Heat.-Vent. Engineers Guide, 1922 Fig. 7 shows graphically the effect of different sizes of pipe with different thicknesses of covering on the heat loss. In the paper as presented before the Society, the author gives complete mathe matical derivations for all cases and for different types of covering such as those made up of several materials and those which are made of various materials com bined with air spaces. For the complete paper (See Transactions, Volume 26, page 335, 1920). WATER PIPE SIZES FOR PLUMBING FIXTURES, BRANCHES AND MAINS By Walter S. Tjmmis, New York, N. Y. Member ' HE lack of data upon which to base water pipe sizes for plumbing Tfixtures, branches and mains is probably due.to the great number of variables which enter into their proper determination. Plumbing fixtures in common use, having what is known as good water flow, deliver the quantities of water per outlet as given in the accompany ing Table 1. PLUMBING TABLE 1. SUPPLY SIZES FOR FIXTURES AND MAXIMUM FLOW IN' GALLONS PFJt MINUTE. Water Closets Gal. per min. Pipe size ... Gal. per min. Pipe size ... Urinals Gal. per min. Pipe size ... Gal. per min. Pipe size ... Number of Fixtures 1 2 4 8 12 16 ' 24 32 40 s 16 24 48 60 80 96 128 150 Tanks i if 1 li li -li 2 2 2 30 50 80 120 140 160 200 250 300 Flush 1 H 1* 2 2 2 2i 2i 24 Valves 6 12 20 32 42 56 72 90 120 Tanks i i I H li li li 2 2 rs 37 45 75 85 100 125 150 175 Flush i li li li li 2 2 2 2 Valves Lavatories and Wash Sinks --based upon each faucet Gal. per min. Pipe size .... 4 8 12 24 30 40 48 64 75 A i i 1 1 li li li 11 Bath Tubs Gal. per min. Pipe size ... 15 30 40 80 96 112 144 192 240 i 1 li 11 2 2 2 2i 21 Shower Baths Gal. per min. Pipe size ... Acid and Slop Sinks, Manu facturing, Kitchen and Laundry Gal. per mill........................ Pipe size ........................... 8 16 32 64 96 128- 192 256 320 8" rain i i li li .2 2 21 21 3 head 15 25 40 64 84 96 120 150 200 per bibb - } 1 - li 11 li 2 2 2 . 2i per bibb NOTE.--The above sizes are based upon a pressure drop of 30 lb. per 100 ft. In estimating risers and mains, tbe number of gailons for W.C. and urinals where flush valves are used, are to be as given for tanks. The hot water faucets arc to be disregarded when estimating risers and mains. For presentation at the Semi-Annual' Meeting of the American Society of Heating and Ventilating Engineers, Buffalo and Detroit, June, 1922. 89