Document pmrv0RYwoX9gQ71VL6mR8oJkB

American Society of Heating and Ventilating Engineers Guide, 1929 TYPICAL EXAMPLE Example in the use of the tables for determining the size of pipe necessary in various parts of the vacuum pump system are shown in the accompanying diagram (Fig. 8): The equivalent length of run from the source of steam supply A to the farthest radiator supplied by any supply main (or the'radiator on floor g Riser E) is between 600 and 800 ft.--therefore size the entire run according to Column H, Table 18, ob serving Note 4 as regards maximum capacity of up-feed supply risers given in Column K. Part of System Branch Supply Main aa ba ' Section of Pipe /to g etof d to e b to e a to b to Riser E D to E A to B Radiation Supplied, Sq. Ft. 400 600 800 1000 1200 1400 1400 1600 2400 3200 4800 Pipe Size; Inches 2H 2M 3 3 3M 3H 3K 3H 4 5 6 5 106 Chapter III--Steam Heating Systems and Piping The equivalent length of run from the source of steam supply A to the farthest radiator supplied by riser D is between 500 and 600 ft.1--therefore size riser D and its branch according to Column G observing Note 4 as regards maximum capacity of up-feed risers given in Column K, Note that the maximum allowable capacity 61 the riser as given in Column K and not Column G, determines the size of some sections of the riser. Part of System Riser D Branch Section of Pipe /to* etof d to e c to d b to c a to b to Riser D Radiation Supplied, Sq. Ft. 200 300 400 500 600 700 700 Pipe Size, Inches 2 2 2M 2H 2M 3 3 Size riser C in manner similar to that used for riser D. The equivalent length of run from the source of steam supply A to the farthest radiator supplied by main BF (or the radiator on floors g riser F) is between 400 and 500 ft.--therefore size the entire run from U to top of riser F, according to Column F, Table 18, observing Note 4 as regards maximum capacity of up-feed supply risers given in Column K. Part of System Riser P *a mm a "" "* Branch Main Section of Pipe / to * e to/ d to e clod b to c a to b to Riser F B to F. Radiation Supplied, Sq. Ft. 400 600 800 1000 1200 1400 1400 1600 Pipe Size, Inches 2K 2H 3 3 3K 3K 3M 3M The equivalent length of run from the farthest radiator served by any return main (or that on floor g return riser G) to the vacuum pump is between 600 and 800 ft.-- therefore size entire run according to Column U. Part of System Return Riser G ir " * " " * " mm u u Branch Return Main mm aa Section of Pipe * to/ / to e ' e to d d to c e to b b to a to Return Riser G G to H H to I I to J J.to L Radiation Served, Sq. Ft. 400 i 600 < 800 1000 1200 1400 1400 1600 2400 3200 4800 Pipe Size, Inches X X 1 1 1 IX iu IK 2 2 2K The equivalent length of run from the farthest radiator served by return riser H to the vacuum pump L is between 500 and 600 ft:--therefore size return riser H accord ing to Column T. Part of System Return Riser H u am aa a mu a mm m am Branch Section of Pipe * to/ /to e e to d d to c c to b b to a to Return Riser H S .Radiation Served, q Ft. . 200 300 400 500 600 700 700 Pipe Size, Inches X. ' X X X X X 1