Document 2jY9jYzyro4GvmMBQnzq0J75R

American Society^/ Heating and Ventilating Engineers. Guide, 1934 1 kilowatt (1000 watts) 1 horsepower 1 boiler horsepower Weight and Volume 1 gal (U. S.) 1 British or Imperial gallon 1 cu ft 1 cu ft water at 60 F 1 cu ft water at 212 F 1 gal water at 60 F 1 gal water at 212 F ... 1 lb (avdp) 1 bushel 1 short ton 1 long ton Pressure 1 lb per. square inch 1 oz per square inch 1 atmosphere 1 in. water at 62 F 1 ft water at 62 F 1 in. mercury at 62 F Metric Units 1 cm * 1 in. 1m lft 1 sq cm 1 sq in. 1 sq \n 1 sq ft 1 cu cm { 1.3405 horsepower 56.92 Btu per minute . 44,252.7 ft-lb per minute f 0.746 kilowatt Z, I 42.44 Btu per minute | 33,000 ft-lb per minute { 550 ft-lb per second = 33,471.9 Btu per-hour. . . _ / 231 cu in. ~ \ 0.13368 cu ft = 277.274 cu in. _ / 7.4805 gal ~ \ 1728 cu in. <= 62.37 lb = 59.76 lb = 8.34 lb = 7.99 lb / 16 oz \ 7000 grains = 1.244 cu ft = 2000 lb = 2240 lb 144 lb per square foot 12.0416 in. mercury at 62 F 2.309 ft water at 62 F 27.71 in. water at 62 F f 0.1276 in. mercury at 62 .F \ 1.732 in. water at 62 F. 14.7 lb per square inch : 2116.3 lb per square foot 33.974 ft water at 62 F 30 in. mercury at 62 F 29.921 in. mercury.at 32 F .. f 0.03609 lb per square inch , j 0.5774 oz per square inch ' [ 5.196 lb per square foot f 0.433 lb per square inch \ 62.355 lb per square foot 0.491 lb per square inch 17.86 oz per square inch 1.131 ft water at 62 F 13.57 in. water at 62 F = 0.3937 in. = 2.54 cm = 3.281 ft = 0.3048 m = 0.155 sq in. = 6.45 sq cm = 10.765 sq ft = 0.0929 sq m = 0.061 cu in. -ir .Charter 42--Heating and .Ventilating Standard Terms 1 cu in. 1 cu m ' 1 cu ft 1 liter 1 kg 1 lb 1 metric ton 1 gram 1 kilometer per hour 1 gram per square centimeter 1 kg per square centimeter (metric atmosphere) 1 gram per cubic centimeter 1 dyne.. 1 joule 1 metric horsepower 1 kilogram-calorie (large calorie) = 16.39 cu cm = 35.32 cu ft = 0.0283 cu m = 1000 cu cm = 0.264 gal = 2.20461b = 0.4536 kg = 2205 lb (avdp) = 980.59 dynes = 0.002205 lb = 0.6214 mph . . . _ / 0.0290 in. mercury, at 0 deg'C \ 0.394 in. water, at 15 C = 14.22 lb per square inch _ f 0.03614 lb per cubic inch \ 62.43 lb per cubic foot = 0.00007233 poundals _ / 10,000,000 ergs ' \ 0.73767 ft-lb . {07.598k6g-hmp per (U. second S.) { 1000 gram-calories ;(small calorie) . 1 kilogram-calorie per kilogram 1 gram-calorie per square centimeter 1 mtte^'0"6 Per SqUare Centimeter = 1.83.B97tuBptuer pound = 3.687 Btu per square foot Centi` = }l.451 Btu per square foot per inch 1 gram-calorie'per second per square centimeter (2903 Btu per hour per square foot for a temperature graduation of 1 deg C per = ( fora temperature graduation of centimeter ( 1 deg F per inch of .thickness. SYMBOLS FOR HEATING AND VENTILATING DRAWINGS5 1. The objects of this standard set of symbols are to ihsure'the correct interpretation of drawings and to conserve drafting room time by establishing simple and unmistakable symbols for the component parts of the heating and ventilating systems. In preparing the list of symbols an effort has been made to follow existing practice insofar as possible but Hhe list imnnot be expected to match exactly the existing practice of every drafting room. 2. Simplicity, ease of execution and unmistakable identification were carefully con sidered in .selecting the symbols. Uncommon fittings and appliances such as vacuum pumps, separators, etc., have purposely been omitted in order to produce a list which can be easily remembered. It is assumed that when the scale of the drawing permits, the valves'and fittings will be drawn to scale and a conventional representation is then unnecessary. 3. High pressure steam supply pipe 4. Low pressure steam supply pipe 5. Hot water pipe--flow 1 --:------r-- 6. Return pipe--steam or water _r-------------- 7. Air vent line ~ ............. --:------- From A.S.H.V.E. Code of Minimum Requirements for the Heating and Ventilation of Buildings, edition of 1929. 601