Document 6BQMOjkZeZGMONB1YZvQdj4Qg

Heating Ventilating Air Conditioning Guide 1939 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 included 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 18. Pipe. Fittings. Welding .V"" with plain ends machine beveled for welding and with radii,similar to ' Sort and long radius flanged fittings. Some typical types of these fittings 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 126 Lb Gast-Iron Flanged Fittings Nominal Pm Sizbv1* A Center-to Face Tees and Crosses b-o AA Face to Face Tees and Crosses b-c Diameter . or Flange Thickness or Flangb, Min. Metal . Thickness or Body, Min. . i IK ; ik 2 2K 3 3K 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. 3K 3K 4 4K 5 5K 6 6K m 8 9 11 12 14 15 16K 18 22 25 28 31 34 , . 7 m 8. 9 10 11 12 13 15 16 18 22 24 28 30 33 36 44 50 56 62 68 '' 4K .m 5 6 7 m 8K 9 10 11 13K 16 19 21 23K 25 27K 32 38K 46 53 59K Kb % He % Kb M Kb 15Ae 1He 1 IK 1He IK IK 1He 1He 1 'He IK 2K 2K 2K 2K Kg He He HHe H K He K K 1He He 1 IK 6 IK IK IKe IK ilK 2 Ail 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 sizeof the larger opening. Sizes 18 in. and larger, reducing on the outlet, ire made in two lengths, depending on the size of the outlet. eTees and .crosses, reducing on. run only, carry same dimensions center to face and face, to face as a straight size fitting of the larger opening. 374 Nominal Pipe Sob A Center to Face Elbow b-o-d B Center to Face Long Radius Elbow b-o-d c Center to Face 45 Deg Elbow e Diameter or Flange Thickness or Flange, Min. Metal Thickness or Body, Min. i IK IK 2 2K 3 3K 4 5 6 S 10 12 14 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 3M 4 4K . 5 5K 6 6K 7K 8 9 11 12 14 15 16K 18 22 25 28 31 34 5 5K 6 6K 7 7K 8K 9 10K UK 14 16K 19 21K 24 26K 29 34 41K 49 56K 64 IK 2 2K 2K 3 3 3K 4 4K 5 ,5K 6K 7K 7K 8 8K 9K 11 15 18 21 24 4K 4K 5 6 7 7K 8K 9 10 11 13K 16 19 21 23K 25 27K 32 38K 46 53 59K He K He K Kb K Kb Kb Kb 1 IK 1Kb IK IK 1Kb 1Kb 1 Kb IK 2K 2K 2K 2K Kb Kb Kb Kb Kb Kb Kb K K Kb K K Kb K 1 1Kb IK IK 1Kb i'K DKe 2 All dimensions given in inches "Sue of all fittings listed indicates nonunal inside diameter of port. eorr^S^!?ng ?nd fide outlet elbows carry same dimensions center to face as straight size elbows wiresponding to the size of the larger opening. as irivS^fSl e.1K>W8, ranging from 1 to 45 deg, inclusive, have the same center to face dimensions far* deg e!bowf "di those over 45 deg and up to 90 deg, inclusive, shall have the same center to lUinuet; fnlnow and is the8Iavnegn,lefoJbe8tw0 edeeng tehlbeofwlasn.geTfhaeceasn. gle designation of an elbow is its deflection from straight ide outlet elbows shall have all.openings on intersection center-lines.