Document ZJRBO7BJDByba4bDb61VndMZ0

HEATINC VENTILATING AIR CONDITIONING GUIDE 1942 set forth in the Standard Manual on Pipe Welding of the Heating, Piping and Air Conditioning Contractors National Association. A complete line of manufactured steel welding fittings is now available Table 12. American Standard Dimensions of Steel Welding Neck Flanges for Steam Service Pressure Rating of 300 Lb per Sq In. (Gage) at a Temperature of 750 F, A.S.A. Bl6e-1939 CHAPTER 18. PIPE, FITTINGS, WELDINC are given in Table 10. Dimensions for eccentric and concentric reducers, and 180-deg return bends are not shown in Table 10 but are included in the American Standard. Larger sizes also are available in some types of fittings. The welding bevel which is a straight 37 Lsrdeg V for wall thick nesses in. and below, and a U-bevel for thicknesses heavier than % in., conforms to the recommended practice of A.S.A. Standard B16e-1939, American Standard for Steel Pipe Flanges and Flanged Fittings. The r ...1, fl.nopc fnr nressures Table 13. Proposed American Standard Dimensions of Sckket-Welding Elbows, Nominal Pips Soa Diam. OP Flange 0 Thick ness op Flg.b Min. e Dual op Hub X % 3X 8* tX % 4% 1 4% iX 2X IX 5% 2X 1% 2 2% 3 6% l%6 2% 6% % 3%e m1 3^6 8% m 4% 3% 4 5 9 1%9 5% 10 IX 5X 11 m 7 6 8 10 12% l%e SX 15 1% 10X 17% 1% 1251 12 20*1 2 14 O.D. 23 2*6 UK 16% 16 O.D. 25% 2% 19 18 O.D. 28 2>A 21 20 O.D. 30% 2% 23% 24 O.D. 36 2X 27% Hub Dlam. Beginning op ChamPERh-o-d ff Length Thbu Hubs Y Inbibb Diam. op Pipe Schedule 40od / 0.84 1.05 1.32 1:66 1.90 2.38 2.88 3.50 4.00 4.50 5.56 6.63 8.63 10.75 12.75 14.00 16.00 18.00 20.00 24.00 2%e 0.62* 2X 0.82* 2% 1.05* 2%6 1.38* 2lMe 1.61* 2% 2.07* 3 2.47* 3% 3.07* 3%6 3.55* 3% 4.03* 3% 5.05* 3% 6.07* 4% 7.98* 4% 10.02* 5% 5% To Be 5% Speci 6% fied by 6% Pur m chaser Inside Diam. op Pipe Schedule SGe-d Diam. op. Bolt Circle No. OP Bolts Size OP Bolts J 0.55 0.74 0,96 1.28 1.50 1.94 2.32 2.90 3.36 3.83 4.811 5.761 7.631 To Be Speci fied bj Pur chaser . 2% 4 % 3X 4 % 3X 4 % 3X 4 % 4% 4 % 5 8% 5% 8 % 6% 8 % 7% 8 % 7X 8 % 9% 8 % 10% 12 % 13 12 % -15% 16 i 17% 16 i% 20% 20 i% 22% 20 i% 24% 24 i% 27 24 i% 32 24 i% All dimensions given in inches. raised face of Vf# io- is included in thickness offlange minimum and in length through hub. ^ bThis outside surface of the welding end of the hub shall be straight or tapered at not more than 6 deg. eDimensions 3 and J correspond to the outside and inside diameters of pipe as given inA-S./l. B36.101939. Schedules 40 and SO. Purchaser's order must specify which of these two inside diameters is desired. dThese flanges are regularly bored to match inside diameter of Schedule 40 pipe, but are bored to Schedule 80 pipe when so ordered. These diameters are identical with the diameters of what was formerly designated ns Standard- Weight Pipe of the corresponding sizes. tThese diameters are identical with the diameters of what was formerly designated as Extra-Strong Pipe of the corresponding sizes. and a dimensional standard has been prepared under the procedure of the American Standards Association to unify heretofore divergent dimensions for the same type welding fittings as produced by different manufacturers. Standard dimensions for elbows, tees, caps, and lapped-joint stub ends 358 Nominal Pipe Size Minimum Depth or Socket Center to BorroM op Socket 90-Deg 0k, Tees, Cresses 45-Deg EUs Sched. Sched. Sched. Sched. 40 4 80 160 40 & 80 160 Couplings Bore Distance Diameter Bet* ebn or Bottoms Socket, Sockets Minimum Minimum Socket Wall Thickness Sched. Sched. Sched. 40 80 160 Bore Diameter or Fittings Sched. Sched. Sched. 40 80 160 JL }i E B Ca D k h k 1K in m 2 2K 3 H M H H Yk A A H H `A >16 >16 % ti H 'A A 116 116 M4 m 1A m 2K iy. 2M `A A SA % 16 >16 % >56 >56 1 1m 1H IK IK m K^ Kb A H A A A K K K 0.555b 0.690b 0.855 1.065 1.330 1.675 1.915 2.406 2.906 3.535 0.156 0.158 0.156 0.156 0.166 0.175 0.181 0.193 0.254 0.270 0.156- 0.158 0.184 0.193 0.224 0.239 0.250 0.273 0.345 0.375 0.234 0.273 0.313 0.313 0.351 0.429 0.469 0.546 0.364 0.493 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 0,302 0.423 0,546 0.742 0.957 1.278 1.500 1.939 2.323 2.900 0.466 0.614 0.815 1.160 1.338 1.689 2.125 2.626 All dimensions are given in inches. ^Dimensions C is IK times the nominal pipe thickness, minimum, but not less than % in. bThis dimension applies to Schedules 40 and 80 only. Reducing sizes have same center to bottom of socket dimension as the largest size of reducing fitting. up to 2500 lb per square inch. Tables 11 and 12 give these dimensions for welding-neck flanges suitable for 150 and 300 lb per square inch gage pressure. Socket welding fittings are also commercially available. These fittings h ave a machined recess into which the pipe slips. A fillet weld between the pipe and socket edge provides a pressure-tight joint. This type of fitti ng has gained rapid acceptance due to its ease of installation, low cost, and ability to make a pressure tight joint without weakening the pipe as is the case with threading. Standard dimensions for socket weld ing fittings are being formulated under the procedure of the American Stan rtnrrtf A ssociation. 359