Document e51MmRezXERrYJYJ2X7Q3nXDG

American Society of Heating and Ventilating Engineers Guide, 1929 Table 17. Pipe Sizes for Vacuum Pump Systems, where Equivalent Length of Run from Boiler or Source of Supply to Farthest Radiator Exceeds 200 Ft. Capacity in Sq. Ft. of Equivalent Radiation Pipe Size Inches A Equivalent Length op Pipe prom Boiler to Farthest Radiator, Including Main and Riser. (See Note 4-) Supply Main Dripped and Branches to Risers Dripped-- Steam and Condensate flowing in same direction. Based on 4 oz. Total Pressure Drop** 100 Ft. 200 Ft 300 Ft 400 Ft. 500 Ft 600 FL B C DBF G Maximum Capacities Supply Risers Up-Feed Branches to Supply Risers and Radiators Not Dripped H / K l IK ik 2 2K 3 3K 4 5 6 8 10 12 in 245 380 771 1270 2326 3474 4914 9092 14,924 31,066 56,689 90,985 79 173 269 546 898 1645 2457 3475 6429 10,553 21,967 40,085 64,336 65 141 220 446 734 1342 2006 2828 5250 8618 17,935 32,730 52,530 56 122 190 386 635 1163 1737 2457 4546 7462 15,533 28,345 45,492 49 110 165 345 568 1040 1552 2196 4062 6669 13,880 25,334 40,660 46 100 155 315 518 948 1419 20113712 6094 12,682 23,144 37,145 . 56 122 190 386 635 1129 1548 2042 i __ __ -- 26 58 95 195 395 700 1150 1700 3150 _______ -- __ -- Pipe. Size Inches Riser Main JK u Ki l IK IK IK IK 2 2 2K 2K 3 3 3K 100 Ft L 800 1400 2400 3800 8000 13,400 21,400 32,000 200 Ft M 568 994 1704 2696 5680 9510 15,190 22,710 Return Mains and Risers 300 Ft 400 Ft 500 Ft. NO P 462 400 358 810 700 626 1387 2195 1200 1900 1073 1698 .4622 7745 4000 6700 3575 5990 12,360 18,490 10,700 16,000 9565 14,300 600 Ft Q 326 570 976 1547 3256 5453 8710 13,020 Different .makes of supply and return valves, steam, traps and other specialties vary as to capacity, therefore use size as recommended for any particular make. Vertical connection to be of same size as valve and trap used. Return horizontal runout to be no less than % In. : 3K 4 44,000 31,220 25,430 22,000 19,660 17,910 Copyright, 1927 American Society or Heating and Ventilating Engineers \ Not to be Reprinted With- Beating and Piping Contractors National Association ) out Special Permission Radiator branches more than 8 ft. in length should be one size larger than shown in Column I. **It is not generally considered gobd practice to greatly exceed 1 os. drop in pressure in each 100 ft. equivalent length of run nor to exceed 1 lb. total pressure drop in any system. .' Note l.--These tables apply where pipes are properly reamed. No allowances for defective material or workmanship have been made. (Aho see Tables 8 and 9). , ., ,. Note .--Capacities based on K lb. condensation per square foot per hour equivalent radiation and actual diameter ot standard pipe. NoteS.--Extra length to be added to straight run of pipe, for various fittings and valves to determine equivalent length. (See Table 4). NoU 4.--Mains are to be proportioned according to the equivalent`length of run from the boiler or source of supply to the farthest radiators supplied by the main. TML * Determine equivalent length of run then use figures in corresponding Column \B to G) for suing the entire run. Supply risers are to be proportioned according to the equivalent length of run from the boiler or source of supply to the farthest radiator on each riser. Determine the distance to the farthest radiator then use figures in that corresponding Column (B to G). for Buing each riser; providing the amount of radiation for that riser does not exceed amounts shown in Column H. Where riser capacities are found to be in excess of amounts shown in Column H, step up to necessary siae indicated in that column. ' , Note 5.--Return mains and risers are.to be proportioned according to the equivalent distance in feet, from farthest radiator to the vacuum pump; uring capacities in that corresponding Column (L to Q) for sizing entire return riser (Column J) and return main (Column /C). The return pipe sizes are conservative and are subject to revision upon the completion of pending research investigations. . Note 6.--Where it is necessary to drip a supply main, supply riser or branch to a supply riser, same Bhould be dnpped separately through & steam trap into vacuum return. Never drip a supply riser into a vacuum return except through a steam trap. Note 7.--lift fittings. (See page 109). , .` Note 8--Fitch of mains should be not less than % in. in 10 ft.; on horizontal branches to radiatore and nsers at least >5ia-In 10 ft. 104 Chapter III--Steam Heating Systems and Piping Table 18. Pipe Sizes for Vacuum Pump Systems, where Equivalent Length of Run from Boiler or Source of Supply to Farthest Radiator Exceeds 200 Ft. Capacity in Sq. Ft. of Equivalent Radiation Pipe Size In. 100 Ft. AB i 157 lK 346 538 2 1091 2K 1797 3 3289 3K 4913 4 6950 Equivalent Length op Pipe prom Boiler to Farthest Radiator, Including Main and Riser. (See Note 4.) Supply Main Dripped and Branches to Risers Dripped-- Steam and Condensate flowing in same direction. Based on 8 oz. Total Pressure Drop*" 200 Ft 300 Ft 400 Ft 500 FL 600 Ft 800 Ft 1000 Ft C D E F GH 1200 Ft / Maximum Capacities Supply Risers Up-Feed Branches to Supply Risers and Radiators Not Dripped K h* in 92 79 70 65 56 49 46 56 245 200 173 154 141 122 110 100 122 26 58 380 310 269 240 220 190 165 155 190 771 . 630 546 487 446 386 345 315 386 95 195 1270 2326 1036 1896 898 1645 803 734 635 568 1470 .1342 1163 1040 518 635 948 1129 395 700 3474 4914 2838 4022 2457 3475 2196 2006 1737 1552 1419 1548 3106 2828 2457 2196 2011 2042 1150 1700 5 12,858 9092 7424 6429 5747 5250 4546 4062 3712 6 21,105 14,924 12,168 10,553 9433 8618 7462 6669 6084 3150 8 43,934 31,066 25,364 21,967 19,638 17,935 15,533 13,880 112,682 10 80,171 56,689 46,288 40,085 35,836 32,730 28,345 25,334 23,144 -- -- 12 128,672 90,985 74,290 64,336 57,516 52,530 45,492 40,660 37,145 16 240,245 169,879 138,381 121,012 107,389: 98,500; 84,849 75,917 69,671 -- -- Pipe Size Inches Riser Main 100 Ft 200 Ft Return Mains and Risers 300 Ft. 400 Ft 500 Ft 600 Ft 800 Ft 1000 Ft 1200 Ft. MN 0 P Q fi. S T U V IF K 1130 Kl 1977 800 1400 653 568 1143 ' 994 505 462 400 358 326 884 810 700 626 570 l IK 3390 IK IK 5370 2400 3800 1960 3103 1704 2696 1515 1387 1200 1073 976 2400 2195 1900 1698 1547 IK 2 11,300 8000 6533 2 2K 18,925 13,400 10,940 5680 9510 5050 4622 4000 3575 3256 8460 7745 6700 5990 5453 2K 3 30,230 21,400 17,460 15,190 13,510 12,360 10,700 9565 8710 3 3K 45,200 32,000 26,130 22,710 20,200 18,490 16,000 14,300 13,020 3K 4 62,180 44,000 35,950 31,220 27,800 25,430 22,000 19,660 17,910 4 5 109,300 77,400 63,200 54,920 48,800 44,720 38,700 34,600 31,500 5 6 175,100 124,000 101,200 88,000 78,200 71,700 62,000 55,410 50,450 Different makes of sup ply and return valves, steam traps and other' special ties vary as to capacity,' therefore use size as recom mended for any particular make. Verti cal connec tion to be of same size as valve and trap used. Return horizontal runout to be not less than M in. Copyright 1927 / American Societt op Heating and Ventilating Engineers ) Not to be Reprinted With- * \ Heating and Piping Contractors National Association / out Special Permission Radiator branches more than 8 ft. in length should be one size larger than shown in Column L. w not generally considered good practice to greatly exceed 1 oz. drop in pressure in each 100 ft. equivalent length of run nor to exceed 1 lb. total pressure drop in any system. .,, A'ok /.--These tables apply where pipes are properly reamed. No allowances for defective material or workmanship have been made. (Also see Tables 8 and 9). Note S.--Capacities based on lb. condensation per square foot per hour equivalent radiation and actual diameter of standard pipe. Notes.--Extra length to be added to straight run of pipe, for various fittings and valves to determine equivalent length. (See Table 4). Note 4.--Mains are to be proportioned according to the equivalent length of run from the boiler or source of supply to the farthest radiators supplied by the main. Determine equivalent length of run then use figures in corresponding Column (B to J) for rising the entire run. Supply risers are to be proportioned according to the equivalent length of run from the boiler or source of supply to the farthest radiator on each particular riser. Determine the distance to the farthest radiator then use figures in that corresponding Column (B to J) for siring providing the amount of radiation for that riser does not exceed amounts shown in Column K. Where riser capacities are found to be in excess of amounts shown in Column K, step up to necessary size indicated in that column. Note 6.--Return mains, and risers are to be proportioned according to the equivalent distance in feet, from farthest radiator to the vacuum pump; using capacities in that corresponding Column (0 to W) for sizing entire return riser (Column M) and return main (Column N). 1 "*iT^urn **** ***** ?r* conservative and are subject to revision upon the completion of pending research investigations. Not* 6.--Where it is necessary to drip 8 supply main, supply riser or branch to a supply riser, same should be dripped separately through a steam trap into vacuum return. Never drip a supply riser into a vacuum return except through a steam trap. Note 7 --Lift fittings. (See page 109). Note 8.--Pitch of mains should be not less than in. in 10 ft.; on horizontal branches to radiators and risers at least H in. indO ft.