Document 2RmppQZzDzZdda7z9kM8Er4Ma

884 CHAPTER 58 1965-Guide And ..Data Book Table 9 .... Dimensions of Hanged Cast-Iron Elbows; Double Brandi Shows, Tees, Crosses, laterals. True Y1* (Straight Sizes), and Reducers (Qass 125) -Ar-j*-A-* w T4 4^ .1 atoss Hoedad .,.fjfp* Sir* imkfe Oio or Ctdtf to hem 90 0*9 Bbev, Taos, Crenel, True Y, end., Doufcto Brandt t .-' Cantor to feem 90 Deg toog Radius Elbow Center to foe* 45 tog Elbow ' Ceator to feem lateral. Short Cantor to Face Tnm Y and tatoraf Elbow .- 1 `a'' 8 CD Foes Seducer ' .Die at Hoags Wad ThicEnats tui l .IK-"" IK -2 2X - 1 IK IK , ' 2 ** : 2K 3K 3K 4 4K 5 5 w' 5K` 2 ' 6 ' 2K[ ' 6K , 2KV' ' 7 3' 5K' 6K V 8- ' 9K / IK IK 2 *2k-' : 5' 2K \ &x ' Hs . Ks . " '4K - ! x " K.; * `5 - - He. :;:K. 6 K -, 7 - - iXe : '! "K. 3 ; 3K 4 5"'"' 6` 3 3K 4 5-6 ' 5K -7K" - -6 8K ,6K 9 ,1:' IX 'r. *' iok ' ' 8 ' llK - ' 3 ' 3K 4 , 4K 5 10 . 12 13K MK 3 - - -3 3 3K 3K -6 - M-. .-7 -8 !. 9 7K` 1'8K i.. 9 : ; io :.ll ::- -K lK lKs l K Ks X X K. 8 10 12 , 14 0D\ 16.0D j .' 8 10 12 r 14 1 9 -11 . 12 14 16 - f 15 A 14 16K 19 i 21K ' 24 ;' 5K 6K - 7K. . 7K 8 18 OD . 18 20 OD 20.... 24;ODir v -24 t,<>- V30OD- 30 ' '35,OD *- 3e 42 OD 42 48 OD > '48..- 16K.. ,18 22 25 . 28* ' -31* .- 34*-. , : 28K- - 8K 29 . - 9K ,--34 -* s - .^11 . l'K : ' 15 ! . 49 - .18 - 56K * :... 21- r. 64 - ,24 W' 20K 24K 27- . 30 4K. ; 5 : , 5K.; 6 ,,... M. - 11.... / 13K. IK : K. 12 io ; . -1K : K. . 14 . 19 .. . .IK Ke .. 16 . . 21 . -.1K:S .X .. 13... .23K, . IK. ::1. 32 ` , j 7 ' 35 : '8 40K - '9 V 49. - io 1...... '19 -20 '. 24'30 36 42 ' 48 ''25 IK.' 27K' ' ' i`K. . " 32 ' IK ` 38K '2K '46' ' 2K " ' 53 -- 2K 59K 2K -1H ' IK 1K 1H* IK . l'K. 2' ; Prom A'mtnea^'8baJer4farCaa IreePipi Flvmmeei FlanjU Wan, Cba US, 4A4.B1S.MMZ..AU dhneastaio shea as* in todies. Ooas not apply to trW.Y'a doahto^flanxed albawa.- ;* i j .1; A soldered^ joint is a'gaslight joint obtained by joining of metil parts.with metallic.mixtures' or alloys which mat at tem peratures below 1000 F abd above 400 F. 2. A braced joint .b-.defined aa a gastight, joint obtained by joining metal,parts'with alloys which melt at temperatures higher than 1000 F but.leafthan toe melting temperature olthe joined ''".'h ku!!- '* n.i ' ' .- ' I :; SdderedJoints. Consideration, of the materials to be used is'an\important preliminary step in any job/concerning the fffiMwwig of copperitube joints) ;The_type' of:solder selected will depdnd on-the service for which the tubeis intended. -In general,, the maximum .temperature and pressure..of the fluid td.be carried .by &e`line are tbAdeciding factors. 'A properly docioTwi piping system.will have suitable provision for ex pansion andcontractioa, although) they are not.the' factor? that determine the kind of solder, tb.be used;- If, op.thejjther hand,.the forces of contraction place high tension stresses on the joints, these stresses may well be in excess of those caused by internal pressure and may be.of first importance. . . Under ordinary circumstances, a properly made joint will be stronger than the'tube itself,-for stresses of short duration: However, at elevated temperatures when'the stress is main- tained over long- periods of time, the solder, .because it is somewhat plastic, may'give when the stress is less than that which would produ5 a break with short-time loads. This con dition- is known as 'creep, and the creep strength of: various types of solder varies widely. - - For all service-at'room-temperatures and for low-pressure steam (up to 15 pa), as well as for moderate pressures with temperatures up to.'250' F,'a`good grade'of 50-50 tin-lead solder is more commonly used. * 7 ^. Pipe; Tube, and Fittings. 885 For all temperatures up to 250 F, where higher strengths1 -Table; 10.........'Dimensions of Steel Butt-Weldingr fittings. are required, a 95-5 tin-antimony solder should be used. .This solder melts at a higher temperature then does 50-50, has ~ less of a pasty range, and is therefore somewhat more difficult-.. to handle, particularly for a vertical joint to be filled upward.... For copper pipe lines carrying refrigerants, the use of silverb solder is recommended, either 35 or 45 percent alloys. These' brazing alloys have been improved to such a degree that their <*>qp of application and their permanence will offset the Iooq Radius Elbows 160 Oeg Returns Straight fees additional material cost. Once a joint is made and tested tight, Conferee- Ceirfer-to- it will remain tight, while soft solder will frequently vibrate loose. The fluxes best suited to the 50-50 and 95-5 solders are in; paste form and consist of a petrolatum base, impregnated with'' inr and ammonium chlorides. It should not be the function of theflux to dean the capper. But if the joint has been cleaned, to Ffoo- Oat- Pipe Siz* . Diometor'at End 90- 450*g Owg Oat- tkto Diam* eter at toCaster Back Face ' Bore) hnwt knwt tBavel' -- -A. B O 'K tiie flux will remove residues of oxide and serve to protect"~ 1 .. 1.315 IK K 1.315 3 2X. the surfaces from oxidation during the heating process, float IK 1.660 IK 1.660 3K 2K out the remaining oxides ahead of the molten solder and - IK 1.900 2K IK 1.900 4K- 3K Outside' End Run Outlet Bevel C M 1.315 IK 1.660 m 1.900 2K IK2K promote wetting action of the solder. For strong, tight, long-lasting joints, thorough cleaning of 2 2.375 13 " IK 2.375 6 . `4K 2.375 the tube surface and'the inside of tbe cup of the fitting is of 1 2X'- 2.875 3K IK 2.875 7X- 6 2.875 3 ; 3 7 the utmost importance. i 3- 3.500 4K 2 3.500 , 9i: 6K- s.'sbo :3K 3K. Pretinning is unnecessary, and is not recommended,- because;' 3K 4.000 5K 2K 4.000 10K 7K:. .4-0iX >3K ;3K' of the possibility that it may interfere with the capillary ac ^ -4; 4.500 .6 ,2K 4.500 12: 8k; .4:500 ;4K 4Xf tion which should draw all the solder needed for the' joint. Capillary action is dependent upon a fairly tight fit (see -;; Fig. 3), and looseness may cause difficulties in larger sizes. This is particularly true for horizontal joints where an over ' sized fitting may allow the tube to rest directly on the socket ' resulting in a double space at the top. Such-joints should be : 5' ' J 5.563 6 6.625 8' 8.625 10 10.750 I2 12.750 :.7K -3K 5.563 15 9 . 3K 6.625 '18 12 "5 8.625 24" 15 6K 10.750 30 18 7K 12.750 i 36 - mi 6.563 <K : AXi 12K 6.625 SH 16Ks 8.625 7 : ^7 20K 10.750 8K . 8K, 24K. 12.750 10 . 10 , made up in a vertical position before assembly. Brazed Joints may be made with brazing alloyB melting at ! 14 temperatures in the approximate range of 1100 F to. 1500.F. 16 These brazing materials are sometimes called hard solders,.a 18 term not universally accepted as-correct. - ' . 20 Brazing materials may be divided into two classes; the 24 14.000 21 8K 14.000 42 16.000 24 10 16.000 48 18.00C 27 :11K 18.000 54 20.00C 30 12K 20.00C 60 {24.000 36 .15 [24.000 72, 28 14.000 ii 32 16.000 12 ; Not.. 36 18.000 13K stand40 20.000 15 ard, 48 ' 24.0C0 17 alloys containing silver, and the copper-phosphorous alloys.' The two classes have fairly wide differences in their melting Spaniard /or Slmi BuU-WtUini Piliimft, ABA B18.V-195S. ara to tochem. Dimension A it eqinl to H of dimension O. and' flowing characteristics, and the user should consider these factors, as well as the time required to make the joint, in selecting the brazing material. For joining copper tubes with while the alloys containing-silver should be used for'joining copper or bronze capillary fittings, any of these brazing alloys- copper with:bronze or steel. . will provide the necessary strength. The copper-phosphorousalloys are definitely preferred when joining copper to copper', With brazed joints; as well, the strength does not vary much with the different brazing materials, but depends to a large extentupon the maintenance of the proper clearance between the outside of the tube' and'the socket of the fitting. ' - The 'ASA B9J Code reads as follows, undo- paragraphr S^JS. "Sweat joints on copper tubing used in refrigerating systems j-mtwifrmg Group 2 or Group 3 refrigerants shall be brazed joints. - Soldered joints *>*!! not be used in such*refrigerating systems." Fig. 2 .... Copper or Brass' Tube Fittings