Document 1y0okw9Ok6zQ63RnRLQ0w8L3X

634 CHAPTER 27 1955 Guide Table 14. Dimensions of Malleable 90-Deg Elbows, Tees, Cbosses, and 45Deg Elbows (Straight Sizes, 150 Lb). Nominal . Pipe Size Center to End, Elbowb, Tees, and Crosses A Centeb to End, 45-DEG Elbows C Length op Thread, Min B Width op Band, Min E [nside Diameter op Fitting ' Metal F Thickness Min Max G Outside Diametbb op Band, Min H h K H K 0.25 0.200 0.405 0.435 0.090 0.693 1.12 6.73 0.80 0.88 0.32 0.36 0.43 0.215 0.230 . 0.249 0.540 0.675 0.840 0.584 0.719 0.897 0.095 0.100 0.105 0.844 1.015 1.197 H 0.98 1.12 0.50 0.58 0.273 0.302 1.050 1.315 1.107 1.385 0.120 0.134 1.458 1.771 IK IK 1.29 0.67 0.341 1.660 1.730 0.145 2.153 1.94 1.43 0.70 0.368 1:900 1.970 0.155 2.427 2H 3K 2.70 3.42 1.68 1.95 2.17 2.39 0.75 0.92- 0.98 1.03 0.422 0.478 0.548 0.604 2.375 2.875 3.500 4.000 2.445 2.975 3.600 4.100 0.173 0.210 0.231 0.248 2.963 3.589 4.285 4.843 2.61 1.08 0.661 4.500 4.600 0v265 5.401 6 4.50 5.13 3.05 3.46 1.18 0.780 5.563 5.663 0.300 1.28 0.900 6.625 6.725 0.336 6.583 7.767 From American Standard for Maileable-Iron Screwed Fittings. 150 Lb. ASA B16.3-I951. AH Himpnainna given in inches. Table 15. Dimensions of Brass or Bronze Screwed 90-Deg Elbows, Tees, Crosses, 45-Deg Elbows, and Couplings (Straight Sizes 125 Lb) Et --A-- lr --L Ai t LrT A i_( j COUPLINGS CAST WROUGHT Nom inal Pipe' Size Center to End Elbowb, Tees, Crosses Length op Thread, Min Cen ter to End . 45-Deg El Diameteb Wrought Coupling Band .Length, Min bows Inside Diameteb op Cant Fitting Min Mm Metal Thick ness, Min Band Diam eteb, Min End to End . Straight Coupling Cast Wrought A BC D E F GH W 0.54 ;0.82 \t.01 K 1.18 0.25 0.32 0.36 0.43 0.50 .1.43 . >.69 IK 1.84 0.58 0.67 0.70 2.12 - 0.75 2.70 0.92 3.08 0.98 4 3.79 1.08 0.42 0.56 0.63 0.78 0.89 1.06 1.22 1.30 1.45 1.95 2.17 2.61 Ms >M* IMs IMs 0.14 0.16 0.17 0.19 0.23 0.27 0.31 0.34 0.41 0.48 0.55 0.66 0.41 0.54 0.68 0.84 1.05 0.44 0.58 0.72 0.90 1.11 1.32 1.39 1.66 1.73 1.90 1.97 2.38 2.88 3.50 4.50 2.45 2.98 3.60 4.60 0.08 0.08 0.09 0.09 0.10 0.11 0.12 0.13 0.15 0.17 0.19 0.22 0.67 0.80 0.81 0.97 1.00 1.05 K17 1.29 1.42 1.43 1.72 1.68 2.10 1.88 2.38 1.92 2.92 3.49. 4.20 5.31 2.20 2.88 3.18 3.69 0.83 From American Standard for Brass or Bronze Screwed Fittings, 125 Lb. ASA B16.15-I947. All dimensions given in inches. Pipe, Fittings, Welding 635 except that the outlet face is at an angle of 90 deg from the inlet face. An angle valve takes the place of a globe valve and an elbow. 3. Checking flow: Preventing back flow is called checking, hence, a cAeclt vidve is used. The basic principle of all check valves is that a reversal uf flow will close the valve. Check valves are either:.awing check or lift:check. 'With a swing check the fluid presses on a hinged flap. If the flow stops or reverses, the flap swings down and seats itself to close the valve. A lift check operates similarly except that the flap, is replaced by a plug that is lifted--through guides--by the force of,the fluid flow. The fluid changes direction of flow, as in a globe valve, and transmits a Vertical Table 16. Dimensions of Cast Brass Solder-Joint Elbows, Tees and 45-Deg . . Elbows (Straight Sices) 90' ELBOW C TO C TEE C to C TO C A3* ELBOW C TO 0 90' STREET ELBOW 43* STREET ELBOW C TO F C TO F Standard Water Tube Size Laying Length* Tee and Elbow Center to External Shoulder 90-Deg Street Elbow H/ Latino Lentgh 45-Deg Elbow J Center to External Shoulder 45-Deg Street Elbow Q MH H Ms H Ho H Mo 1M 1M 7A lM 1 2 IN 2M 1H 3J4 154 2 4 5 2M m 354 4K 54 Ho Ms Ho n 1 m m m 2M Ms Ms H Ms Ms 54 Ms 54 M K *Ms lMs 154 2K From American Standard for Cast-Brass Solder-Joint Fittings, ASA B10.18-1950. All dimensions given in inches. Not standardized for wrought fittings. Consult manufacturer for dimensions. Ms Mo H Ms Ms 54 M thrust. If the flow stops, gravity pulls the plug downward and closes the valve a reversal of flow will close the valve. Two other types of valves are the relief valve and the pressure regulat ing valve. Relief valves are usually spring loaded in order that some preetermined pressure can force the valve to open and relieve the pressure, ^ssure regulators are used to reduce a high incoming pressure to a re quired service pressure. These valves are designed to eliminate a fluctua'on in the incoming pressure and thereby maintain a steady, lower service Pressure (see Chapter 21). Table 18 contains data on the dimensions of flanged and welding end th VJu Dimensions of other type valves can be obtained by writing to. e Manufacturers Standardization Society of the Value and Fitting Industry.