Document EdMkbLoQe9zDvRbwXovEYQK54

HEATING VENTILATING AIR CONDITIONING CUIDE 1944 Table 6. American Standard Dimensions of Elbows, 45-Deg Elbows, Tees, and Crosses (Straight Sizes) for Class 125 CastIron Screwed Fittings, A.S.A. B16a-1939 . CHAPTER 17. PIPE, FITTINCS, WELDING Table'7. American Standard Dimensions of Tees, Crosses (Straight Sizes), and Elbows for Class 125 Cast-Iron Flanged Fittings, A.S.j4. B16a-1939 Tee Side outlet Cross A Nominal Pm 8izb Center to End, Elbows, Tees and CB08SES cBB Centeb to End, 45 Dsg Elbows Ianqih or Thhbad, Mm.' Width or Band, Mm. F Iframg DIAMETER or Fitting Min. Mat. GH Mbtal Thickness, Mm. OuTsma Diameter or Band, Mm. K % K K l IK 1)4 2 214 3 m 4 5 6 8 10 12 0.81 0.95 1.12 1.31 1.50 1.75 1.94 2.25 2.70 3.08 3.42 3.79 4.50 5.13 6.56 8.08b 9.50b 0.73 0.80 0.88 0.98 1.12 1.29 1.43 1.68 1.95 2.17 2.39 2.61 3.05 3.46 4.28 5.16 5.97 0.32 0.36 0.43 0.50 0.58 0.67 0.70 0.75 0.92 0.98 1.03 1.08 1.18 1.28 1.47 1.68 1.88 0.38 0.44 0.50 0.56 0.62 0.69 0.75 0.84 0.94 1.00 1.06 1.12 1.18 1.28 1.47 1.68 1.88 0.540 0.676 0.840 1.050 1.315 1.660 1.900 2.375 2.875 3.500 4.000 4.500 5.563 6.625 8.625 10.750 12.750 0.584 0.719 0.897 1.107 1.385 1.730 1.970 2.445 2.975 3.600 4.100 4.600 5.663 -6.725 8.725 10.850 12.850 0.110 0:120 0.130 0.155 0.170 0.185 0.200 0.220 0.240 0.260 0.280 0.310 0.380 0.430 0.550 0.690 0.800 0.93 1.12 1.34 1.63 1.95 2.39 2.68 3.28 3.86 4.62 5.20 5.79 7.05 . 8.28 10.63 13.12 15.47 AH dimensions given in inches. "Patterns whatl be designed to produce castings of metal thickness given in the table. Metal thickness at no point shall be less than 90 per cent of the thickness given in the table. bApplies to elbows and tees only. used, particularly where the temperature exceeds 250 F. Jacketed asbestos and metallic gaskets may be used for any pressure and tem perature conditions, but preferably only with a relatively narrow recessed facing. WELDING Erection of piping in heating and ventilating installations by mean of fusion welding has been commonly accepted in the past few years as an alternate method to the screwed and flanged joint. Since the question of economy of welding as against the use of screwed and flanged fittings 334 90 deg Long radius 45 deg Reducing Side outlet A AA Nominal . PffB&SB*-0 Centeb to Face Tees, Crosses-* and Elbows Face to Face Tees AND Crosses-* i i y*. 2 2)4 3 3)4 4 5 6 8 10 12 14 O.D. 16 O.D. 18 O.D. 20 O.D. 24 O.D. 30 O.D. 36 O.D. 42 O.D. 48 O.D. 3)4 3K 4 m 5 5K 6 m m 8 9 11 12 14 15 16)4 18 . 22 25 28 31 34 7 m 8 9 10 11 12 13 15 16 18 22 24 28 30 33 36 44 50 56 62 68 B Center to Face Long Radius ELBdw*'*'* c Center to Face 45 Dbg Elbows nTlMBTICB or Flange Thickness or Flange, Mm. MetaiA Thickness or Body 5 6)4 6 6)4 7 7K m 9 ioh ii y2 14 i6y2 19 213^ 24 26K 29 34 41^ 49 56M 64. W 2 2K m 3 3 3)4 4 i)4 5 ,6)4 6)4 7)4 7% 8 m 9)4 u. 15 18 21 24 4K 4K 5- 6 7 7)4 8)4 9 10 11 13)4 16 19 21 23)4 25 27)4 32 38K 46 53 59)4 % )4 . K& K % K % % % l m m m m i% m 1>H m 2)4 ' 2Va 2K 2K % % % 96' 96. % )6 )4 )4 % % K % l% lVfi lK IK m Wi 1% 2 All dimensions given In inches. "Crosses both straight and reducing sizes 18 in. and larger shall be reinforced to compensate for the. inherent weakness in the caatlng design. bSize of all fittings listed indicates nominal inside diameter of port. Tees. side outlet tees, and crosses, 16 in. and smaller, reducing on the outlet, have the same dimensions center to face, and face to face as straight size fittings corresponding to the size of the larger opening.Sizes 18 in and larger, reducing on the outlet, are made in two lengths, depending on the size of the outlet. frees and crosses, reducing on run only, carry same dimensions center to face and face to face as a straight size fitting of the larger opening. Reducing elbows and side outlet elbows'carry same dimensions center to face as straight size elbows corresponding to the size of the larger opening. `Special degree elbows, ranging from 1 to 45 deg, inclusive, have the safiie center to face, dimensions as given,for 45-deg elbows and those over 45 deg and up to 90 deg, inclusive, shall have the same center.to [ace dimensions as given for 90-deg elbows. The angle designation of an elbow is its deflection from straight line flow and is the angle between the flange faces. "Side outlet elbows shall have all openings on intersecting center-lines. hBody thickness at no point shall be less than 87} per cent of the dimensions given in the table. 335