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T a b l e 6 . R e t u r n P ip e C a p a c it ie s f o r o w . P r e s s u r eL S y s t e m s
524
CHAPTER 20
1957 Guide
CAPACITY OP RETURN RfAlNS-AND R I S E R S ,
Capacity Expressed In Square Feet of Equivalent Direct Radiation
(Reference to thia table w ill be b y column le tte r M through EE) T his table is based on pipe size data developed through the research investigations of The A m e r ic a n So c ie ty of H e a t in g a n d A ir -C o n d it io n in g E n g in e e r s .
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800 1.400 460 1.400 2.400 962 2.400 3,800 1,510 3,800 3.000 3.300 8,000 13.400 5,450 13.400 21.400 10,000 21.400 32.000 14.300 32.000 44.000 21,500 44.000
77.400 124.000 190 450 990 1,509 3,000
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2,800 1,880 ___ 1 3,240
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15.500 11,700
190 450 990 1,500 3,000
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Steam Heating Systems
525