Document 6RnMXgKMk91LLZjZ0JVNexx5R

HEATINC VENTILATING AIR CONDITIONING GUIDE 1943 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, ^'.5.4. B16e-1939 Nominal Pips Size Dual or Flange 0 Thick ness or Flg. Min. Q Diam. OF Hub X Hub Diam. Beginning oFfECabh-ac-md* Length Thru Hub* HY Inside Diam. of Pipe Sch40ecd-udle J Inside Diam. of Pipe Schedule 80-d -------J---- w Diam. of Bolt Circle NOoF. SOizFe Bolts Bolts k K 1 ik 2 2% 3 3K 4 5 6 8 10 12 14 O.D. 16 O.D. 18 O.D. 20 O.D. 24'O.D. 3% 4K 4K 5M 6K 6K 7K m 9 10 11 12K 15 17K 20K 23 25% 28 30K 36 He IK K IK We 2K K 2KWe 2K Vs 3He 1 3We IK 4K We 5K w 5M m7 We 8K m 10M IK 12K 2 14K 2K 16K 2K 19 2K 21 2K 23K 2% 27% 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 2He 2K We We 2We W 3 3K 3He 3K 3K 3K 4K 4K 5K 5K 5K, 6K 6K 6K ' 0.62* 0.82* 1.05* 1.38* 1.61* 2.07* 2.47* 3.07* 3.55* 4.03* 5.05* 6.07* 7.98* 10.02* ToBe Speci fied by Pur chaser 0.55 f 0.74f 0.96 f 1.28f 1.50f 1.94f 2.32f 2.90f 3.36f 3.83 f 4.81 f 5.76f 7.63 f To Be Speci fied by Pur chaser 2K 4 K 3K 4 K 3K 4 K 3K 4 % 4K 4 M 5 8K 5K 8 K 6K 8 H 7K 8 H 7K 8 % 9K 8 % 10K 12 H 13 12 K 15K 16 l 17% 16 IK 20% 20 IK 22K 20 IK. 24% 24 IK 27 24 IK 32 24 IK All dimensions given in inches. A raised face of K in. 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 0 deg. "Dimensions H and J correspond to the outside and inside diameters of pipe as given in A.S.A. B36.101939, Schedules 40 and 80. 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. . *Tbese diameters are identical with the diameters of what was formerly designated as Standard-Weight PtPe of the corresponding sizes. fTbese 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 362 , CHAPTER 18. PIPE, FITTINGS; WELDING 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 37M>-deg V for wall thick nesses M in; an<3 below, and a U-bevel for thicknesses heavier than 34 in-, conforms to the recommended practice of A.S.A. Standard B16e-1939, American Standard for Steel Pipe Flanges and Flanged Fittings. The latter also contains dimensions for steel welding neck flanges for pressures Table 13. Proposed American Standard Dimensions of Socket-Welding Elbows, Tees, Crosses, 45-Deg Elbows, and Couplings Nominal Pipe Size Center to Bottom of Socket' Minimum Socket Couplings Bore Wall Thickness Minimum 90-De ; Ells, Depth ' Tees, (Crosses 45-Deg Ells 07 * Socket Sched. Sched. Sched. Sched. 40 & 80 160 40 4 80 160 Distance Between Bottom Sockets Diameter or Socket, Sched. Minimum 40 Sched. 80 Sched. 160 Bore Diameter of Fittings Sched. Sched. Sched. 40 80 160 A" A E B Ca D HH 7iZ X %O 1 | IK 1H 2 2H K 3X % HK HX li I\Hv.b IK ik IK IK 2K VX 254 K K KK K% %% % %1 1 ,1K IK IK IX 114 Kb 0.555b 0.156 0.156 0.364 0.302 Kb 0.690b 0.156 0.158 0.493 0.423 H 0.855 0.156 0.184 0.234 0.622 0.546 0.466 K' 1.065 0.156 0.193 0.273 0.824 0.742 0.614 K 1.330 0.166 0.224 0.313 .1.049 0.957 0.815' X 1.675 0.175 0.239 0.313 1.380 1.278 1.160 K '1.915 0.181 0.250 0.351 1.610 1.500 1.338 X 2.406 0.193 0.273 0.429 2.067 1.939 1.689 X 2.906 ' 0.254 0.345 0.469 2.469 2.323 2.125 X 3.535 0.270 0.375 0.546 3.068 2.900 2.626 All dimensions are given in inches. ^Dimension C is IK times the nominal pipe thickness, minimum, but not less than % in. bTbis dimension applies to Schedules 40 and 80 only. Reducing sizes have same center to bottom of socket dimension as the largest size of reducing fitlting. up to 2500 lb per square inch. Tables H 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 , have 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 fitting 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 welding fittings are being formulated under the procedure of the American Standards Association. 363