Document EdqbJX6k3O7bN3qJVwVnzONN0

v.:;. "* Heating Ventilating Air Conditioning Guide 1939 1 atmosphere 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 1 in. water at 62 F 1 ft water at 62 F . . . 1 in. mercury' at 62 F .. v; Metric Units . > { 0.03609 lb per square inch 0.5774 oz per square inch 5.196 lb per square foot I 0.433 lb per square inch \ 62.355 lb per square foot 0.491 lb per square inch ' 7.86 oz per square inch 1.131 ft water at 62 F 13.57 in. water at 62 F ? 1 cm* 1 in. Im 1 ft 1 sq cm 1 sq in*. 1 sq m 1 sq ft 1 cu cm 1 cu in. 1 cu m 1 cu ft 1 liter 1 kg 1 lb = 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. = 16.39 cu cm = 35.32 cu lt .' = 0.0283 cu m = 1000 cu cm = 0.264 gal = 2.2046 lb ' ': = 0.4536 kg ': ' " , 1 metric ton = 2205 lb (avdp) 1 gram 1 kilometer per hour ; = 980.59 dyncs = 0.002205 1b = 0.6214 mph . 1 gram per square centimeter: _ / 0.0290 in. mercury, at 0 deg C \ 0.394 in. water, at 15-C 1 kg per square centimeter (metric atmosphere) 1 gram per cubic centimeter 1 dyne 1 joule = 14.22 lb per square inch " ? > V = f 0.03614 lb per cubic inch. = \ 62.43 lb per cubic foot : = 0.00007233 poundals _ / 10,000,000 ergs " I 0.73767 ft-lb v^ 1 metric horsepower _ / 75 kg-m per second ~ \ 0.986 hp (U. S.) 1 kilogram-calorie (large calorie) 1000 gram-calories (small = calorie) 3.97 Btu 1 kilogram-calorie per kilogram = 1.8 Btu per pound . . .. ... 1 gram-calorie per square centimeter = 3.687 Btu per square foot 1 gram-calorie meter per " square centimeter per centi = 1.451 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 = j for a temperature graduation of centimeter ... ; \ 1 deg F per inch of thickness. 850 Chapter 45. Terminology SYMBOLS FOR HEATING. VENTILATING AND AIR CONDITIONING DRAWINGS6 1. The objects of this standard set of symbols are to insure 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 ah effort has been made to follow existing practice in so far as possible but the list cannot be expected to match exactly the existing practice of every drafting room. Piping 6. Air Piping ----- *------ *----- `------ *------ Piping 7. Vacuum ___ _________ _____------------ Piping ~, 3. Condensate Piping 4. Cold Water Piping 8. Gas Piping --------- -------------------------- 9. Refrigerant ' Piping------ +--+---- 1-------+ -- 5. Hot Water Piping - 10. Oil Piping _ .11. Lock and Shield Valve : 12. Reducing Valve . 13. Diaphragm Valve 14. Thermostat 15. Radiator Trap Elevation 16. Radiator Trap Plan H<8> 17. Tube Radiator Plan C=3 PP18. Tube Radiator Elevation 19. Wall Radiator Plan = 120. Wall Radiator Elevation 21. Pipe Coil Plan 22. Pipe Coil Elevation 23. Indirect Radiator Plan ; : I; ;i 24. Indirect Radiator - tv ~>i pi Elevation U_^l ksl 25. Supply Duct, Section 26. Exhaust Duct, Section 27. Butterfly Damper Plan (or Elevation) 28. Butterfly Damper Elevation (or Plan) 29. Deflecting Damper Rectangular Pipe 0 ~r~^ --^-- ----- --LJ-- -- 30. Vanes 31. Air Supply Outlet, 32. Exhaust Inlet From A.S.H.V.E. Code of Minimum Requirements for the Heating and Ventilation of Buildings,sedition of 1929, and American Standard Drawings and Drafting Room Practice Graphical Symbols (.American Standards Association, ZI4.2--1935). 851