Document XzqMgpQaJnw4mxbb2MBQpK9BG

American Society of Heating and Ventilating Engineers Guide, 1937 the use of the welding process. These Codes prohibit individual practices contrary to their specified procedure and rules of control, and this is predicated upon the sound requirement that the employer must assume full responsibility for the deposited weld. It is advisable that this management responsibility be. iiTcluded in all welding specifications and that authoritative standards of workmanship also be specified. The standards of workmanship for this industry are as 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 8. American Standard Dimensions of Tees and Crosses (Straight Sizes) for 125 Lb Cast-Iron Flanged Fittings Chapter 34--Pipe, Fittings, Welding w;th plain ends machine beveled for welding and with radii similar to shoVt and long radius flanged fittings. Some typical types of these fittings are shown in Fig. 3. They are made in pipe sizes % to 24 in., standard and extra heavy, in steel, wrought iron, brass, copper, and special alloys. Socket welding fittings of forged steel 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. A proposed American Standard containing dimensions of steel welding-neck flanges for pressures up to 1500 lb per sq in. has been developed in A.S.A Table 9. American Standard Dimensions of Elbows for 125 Lb Cast-Iron Flanged Fittings NOMINAL Pipe 8m*-b A Center to Face Tees and Crosses b- AA Face to Face Tees and Crosses lx Diameter or Flange Thickness or Mm.Flange, Metal Thickness or Body, Min. i IX 2 '^X 3 aX 4 5 6 8 10 12 14 O.D. 16 0.D. 18 O.D. 20 O.D. 24 O.D. 30 O.D. 36 O.D. 42 O.D. 48 O.D. ax ax 4 4K 5 5X 6 6X 7X 8 9 11 12 14 15 16X 18 22 25 28 31 34 7 7X 8 9 10 11 12 13 15 16 18 22 24 28 30 33 36 44 50 56 62 68 4X 4M 5 6 7 7X 8X 9 10 11 tax 16 19 21 23X 25 27X 32 asx 46 53 59X He X Mb X % X xXe Mb LX* 1 ix 1Kb IX IX 1Mb 1Mb 1% 4% 2X 2% 2X 2X Mb -Mb Mb Mb Mb Mb 'X X Mb X X 13Mb X 1 1Mb IX IX 1Mb IX DMb 2 All dimensions given in inches. Size of all fittings listed indicates nominal inside diameter of port. bTees, 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 Tees and crosses, reducing on run only, cany same dimensions center to face and face to face as a straight size fitting of the larger opening. PinNominal Size* ABc Center to Face Elbow b-e-d Center to Face Long Radius Elbow b-o-d Center to Face 45 Deg Elbow e Diameter or Flange Thickness or Flange, Min. Metal Thickness or Boot, Min. i IK IK 2 2K 3 3K 4 5 6 8 10 1214 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. 3K ax 4 4K 5 5X 6 6K 7X 8 9 11 12 14 15 16K 18 22 25 28 31 34 5 5K. 6 6K 7 7X 8K 9 10K liK 14 16K 19 21K 24 26Mi 29 34 41K 49 56K 64 IX 4K He Mb 2 4X Me 2X 5 Mb Me 2X 6 % Me 3 7 1Hb Me 3 7X X Me ax 8X ^6 Me 4 9 *Mb Ms 4K 10 %X 5 11 1 Me 5X 13K ix % 6K 16 1Mb X 7K 19 IX Wt 7K 8 21 23K IX 1Kb M i 8K 25 1Mb iMb 9K 27X VMb IK 11 32 IX IX 15 38X 2X 1Mb 18 46 2X IK 21 53 2X VMs 24 59K 2X 2 All dimensions given in inches. Size of all fittings listed indicates nominal inside diameter of port. bReducing 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 same 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 face dimensions as given for 90 deg elbows. The angle designation of an elbow is its deflection from straight fine flow and is the angle between the flange faces. 4Side outlet elbows shall have all openings on intersection center-lines. 637 >. i