Document pp4XvneQxbV4kEYqx7rKK6Qza

.American Society of Heating and Ventilating Engineers Guide, 1930 Chapter 21--Piping for Hot Water Heating Systems FeicnoN Mia d in M ilin c h c j p ta Toot of Pipe and pch C lbow' Fig. 6. Friction Heads, in Small Pipes and Elbows, for a 20 deg. Temperature Difference of the Water in the Flow and Return Lines To design the major system, assume that the system is to operate with a maximum water temperature of 205 deg. and with a temperature drop . of 25 deg., that the length of the horizontal main is 125 ft., that the 374 Fig. 7. Friction Heads, in Large Pipes and Elbows, for a 20 deg. Temperature Difference of the Water in the Flow and Return Lines length of two risers, including heater connections, is 10 ft., and that there are seven elbows in the main, and that the vertical distance from the center of the heater to the average elevation of the main is 3 ft. 6 in. 375