Document 74MaDeajO4wJrkknnoM9yK0R

574 CHAPTER 27 1949Guide analysis of the pipe;are the'governing'factors, notthe working pressure. There are a number of safety codes which govern the installation of welded : piping.in many cities and states. Some of the more prominent are listed at the end of:this chapter4 6-6. A complete' line of manufactured steel welding fittings is now available Table 9. American Standard Dimensions of Steel Welding Neck and Slip-on Welding Flanges for Steam Service Pressure Rating of 150 PSI (Gage) at a Temperature of 500 F, and 100 PSI (Gage) at 750 F, A .S.A. B16e-1939 Pipe, Fittings, Welding 575 are included- in the American Standard; Larger sizes also are available in some types of fittings. The welding bevel which is-a straight 37^-deg. V for wall thickness f in. and below, and a U-bevel for thicknesses heavier than l in., conforms to theirecommended 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 up to 2500 psi, and-slip-on welding flanges for 150 and 300 psi. Table 9 gives these dimensions for welding-neck and slip-on welding flanges suitable for 150 psi gage pressure. Socket-welding fittings also are commercially available. These fittings have a machined recess for inserting the. pipe which is attached by a Table 10. Proposed American - Standard Dimensions' of Socket-Welding Elbows,- Tees, Chosses, 45-Deg Elbows, and Couplings Noumu Pm 8m Vi % i \Xf 1^ 2 2J4 3 m 4 5. 68 10 ,; 12 14'O.D. 16 O.D. 18 O.D. 20 O.D. 24 O.D. Duvbrb or Flange Thickness Of Flo.* Mm. Diameter or Bob Hub Diam. BEonormo or: Chamfer^-* Length Thro - HpB*; Inside Diam. SCHoErDPULitEs40. C 0, ' X H r '' / BSolirpe-oonr Flanges Diam. or Bolt No. or . 8bx or Mm. CiBcta Bolts Bolts m % m vi iVi m Vi 5. % 6 5 7 ' Vi 7Vi' % m % 9% 10 m 11 i 13H. m- 18 ' : ; 156 19 21 23K 114 25 156 27M 32 1% m 156 1 Vi . 1*56 256 . 256 .356 345V6i 4`56 556 656 756 - 9*56 12 14% 15% 18 19J4 22 .2654 0.84 154 0.62*. 0.88 ;,254: . 4 54 1.05 256 . 0.82* 1.09 254 4 1.32 256 1.05* 1.38 354 . -4 ' 1.66 254 1.90. 256 1.38* 1.61* 1.72- 354 .; 4 1.97, 354 , 4 , 2.38 254 2.07* 2.44 454 4 54 2.88 254 2:47* 2.94 554 4 54 3.50 : 254- 3.07*'- 3.56 6 : 4 54 4.00, 2% 3.55* .4.06. : 7 - - " 8 Vi 4.50 3 , 4.03* . ; 4.56 . 754. 8 54 5.56 354 5:05* 5.66 854 .8 54 6.63 m 8.63 : 4:. 10.75 .4. 12.75 454 6.07* 7.98* _10_.0_2_* 6.72 ;8.72 .10.88 12.88 954 1154 1454 17 8 8 : A% 12 Vi 12 U 14.00 5 To Be 14.19 1854 12 1 ' 16.00 5 Specified : 16.19 -2154- 16 1 18.00 20.00 554 by ; .18.19 22?4, .16 5*56 Purchaser 20.19 25 20 1 V* 24.00 6 24.19 2954 20 !54 All dlmensiona:givexi in inches. A raised face'of A in. is included in thicknees offlange minimum and in length through Ati6. ` ':1 ^The outside surface of the welding end of the hnb shall be straight or tapered at not more than 6 degl . ^Dimensions H and J correspond to the outside and inside diameters of pipe as given in A.S.A. B36.10- 1939, Schedule 40. ; ' These diameters are identical with thie diameters of what was formerly designated as Standard Weight Pipe of the corresponding sizes. * and a dimensional'standard has been prepared under the procedure of the Amlmcan Standards' Association to'unify heretofore'divergent diniehsions for the same(type welding fittihgs aAproduced'.by different manufacturers;' Standard dimensions for steel butt-welding elbows, tees, caps, and'lappedjoiiit stub ends are given in Table 8. Dimension's for eccentric ahd'con centric reducers, and 180-deg return, bends are' not shown in -Table :8: but Nominal Pipe SlTF Center to Bottom op Socket Couplings Boas . Minimum Socket ' Wall Thickness Minimum 60-De, : Ells, Depth Ten, ( . 45-Deg Bla or Socket Sched. Sched. Sched. Sched. 40 4 80 160 10 4 80 . 160 Distance Between Bottom , 8ockbts Diamstbb op Socket, Minimum Sched. 40 Sched. 80 Sched. 160 Bore Diameter or FmtNGs Sched. Sched. Sched. 40 80 . 160 A A EB C* ,D , 54 aO 1 IK \2A 1A 3 H K A -A A A H xKt AA HH . ix IK IW lK m lA tA lA 2K. 254' - 2A XK X- K XA A AX A X :% r A % % ' 1 % 1 lVfi - A A54 \A 1J4 1K 15? -. H 0.555 0.156 0.690 0.156 0.855 0 156 1365 0.156 . 1-330 . 0.166 1.675 0.175 1.915 0.181 2.406 0193 2.906 0.254 3.535 0.270 0.158 0.184 0.193 0.224 0.239 0.250 0.273 0345 0375 0334 0.273 0313 0313 0351 0.429 0.469 0346 0364 0.423 0.622 0346 0324. 0.742 1349 .0.957 1380 1378 1.610 1300 2.087 1.939 .2.469 2323 3368 2300 0.460 0.614 0315 1.160 1338 1.689 2.126 2329 AU dimensions are given in inches. Dimension C is 1J times the nominal pipe thickness, minimum, butnot less than A in. . Reducing sices have same center to bottom of socket dimension as the largest size of reducing fitting. fillet.,weld.between the pipe wall and socket end.. Use of socket-welding fittings,generally is, restricted,to nominal pipe sizes 3 in; and smaller in which range commercial fittings are available. . This type of fitting has gained .rapid acceptance owing to its ease ..of installation, low cost, and ability lb mike a. pressure tight joint without weakening the.pipe as is the case,,with threading- Dimensions for socket-welding fittings as offered' by most manufacturers of; the product are given in Table 10. ' ' ' valves .' ' Valves are made with both threaded and flanged ends for screwed and bolted connections just as are pipe fittings. _> . .. The material used , for valves of small- size is generally brass- or bronze for low pressures and forged steel for high pressures; while in the larger