Document dQoeOQ7NgqN36ZYq0E8obB1ZG

16 CHAPTER 2 1946 Guide Pressure , 1 lb per square inch 1 oz per square inch 1 atmosphere 1 in. water at 62 F (in vacuo) 1 ft water at 62 F (in vacuo) 1 in. mercury at 62 F (in vacuo) 1 in-, mercury at 32 F (in vacuo) 144 lb per square foot {2.0360 in. mercury at 32 F 2.0422 in. mercury at 62 F 2.309 ft water at 62 F [ 27.71 in. water at 62 F / 0.1276 in. mercury at 62 F \ 1.732 in. water at 62 F 14.696 lb per square inch 2116 lb per square foot 33.94 ft water at 62 F 30.01 in. mercury at 62 F 29.921 in. mercury at 32 F 0.03609 lb per square inch 0.5774 oz per square inch 5.197,1b per square foot -{ 0.4330 lb per square inch 62.37 lb per square foot 0.4897 lb per square inch 7.835 oz per square inch 1.131 ft water at 62'F 13.57 in. water at 62 F = 0.49115 lb per square inch Metric Units 1 cm 1 in. = 0:3937 in. = 0.0328 ft = 2.540 cm 1m lft 1 sq cm 1 sq in. ; 1 sq m *. 'a = 3.281 ft = 0.3048 m = 0.1550 sq in. = 6.452 sq cm = 10.76 sq ft , 1 sq ft 1 cu cm 1 cu in. 1 cu m 1 cu ft 1 liter 1 kg * .' = 0.09290 sq m = 0.06102 cu in. = 16.39 cu cm = 35.31 cu ft . = 0.02832 cu m = 1000 cu cm = 0.2642"ga! = 2.205 lb (avdp) nb = 0.4536 kg 1 metric ton = 2205 lb (avdp) 1 gram = 0.002205 lb. (avdp) 1 kilometer per hour ' = 0.6214. mph 1 gram per square centimeter. , _ f 0.02905 in. mercury at 62 F \ 0.3942 in. water at 62 F . 1 kg per sq cm (metric atmosphere) = 14.22 lb per square inch *i 1 gram per cubic centimeter. ' _ f 0.03613 lb per cubic inch. \ 62.43 lb per cubic foot 1 dyne = 0.00007233 poundals 1 absolutejoule _ / 10,000,000 ergs . ~ \ 0.7376 ft-lb 1` 1 Int. joule ", = 0.7378 ft-lb 1 metric horsepower ; ^ / 75 kg-m per second . ~ \ 0.986 hp (U. S.) 1 I. T. kilocalorie per kilogram = 1.8 Btu per pound 1 I.T. calorie per square centimeter - = 3.687 Btu per square foot 1 I.T. calorie per (second) (square centimeter) for , f2903 Btu per (hour) (square.foot) a temperature gradient of 1 .C. deg per'centi:. = -J for a temperature gradient of1 F meter' **"."'* "; ' 1' (deg per inch.of thickness: : , Jktirvtjiations and Symbols_ 17 GRAPHICAL SYMBOLS FOR DRAWINGS6 Graphical Symbols for Drawings Piping Heating 1. High Pressure Steam 2. Medium Pressure Steam 3. Low Pressure Steam 4. High Pressure Return 5. Medium Pressure Return 6. .Low Pressure Return 7. Boiler Blow'Off 8. Condensate or Vacuum Pump Discharge 9. Feedwater Pump Discharge --00-- --00-- --00-- 10. Make Up Water 11. Air Relief Line . 12. Fuel Oil Flow 13. Fuel Oil Return 14. Fuel Oil Tank Vent --FOF-FOR--FOV- 15. Compressed Air 16. Hot Water Heating Supply ----- A-- Air Conditioning . 18. Refrigerant Discharge ' 19. Refrigerant Suction 20. Condenser Water Flow 21. Condenser Water Return 22. Circulating Chilled or Hot Water Flow 23. Circulating Chilled or Hot Water Return 24. Make Up Water 25. Humidification Line 26. Drain 27. Brine Supply ; 28. Brine Return -----------------;---- RD .................... --------------- C------------------- ---- -----CR---------- ------------------ CM--------------- ----------------------- D------------------------ ----------------8---------------- Plumbing 29. Soil, Waste or Leader (Above Grade) 30. Soil, Waste or Leader (Below Grade) 31. Vent 32. Cold Water 33. Hot Water . 34. Hot Water Return - 35. Fire Line 36. Gas 37. Add Waste 38. Drinking Water Flow 39. Drinking Water Return 40. Vacuum Cleaning 41. Compressed Air --------- --------------- :--------- ---------------- ;------------------ ---------------- ----------------- - ----------------------------------- ------------------ ---------------- ---------------------------- ,----- --------------------r------ . ------e-------------------------- -------------- ------------------ -- ----------------------------------- :---------------------------------- ----- v v------ ------;------ 4-a-------:--------- Sprinklers 42. Main Supplies 43. Branch and Head 44. Drain . ,' ' ** 1 S' --o-- -------- s_______ 'Graphical Symbols for Use on Drawings in Mechanical Engineering. Z32.2-1941 (American Standards Association). ^