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FILE NAME: Boilermaking (BOIL) DATE: 0000 DOC#: BOIL003 DOCUMENT DESCRIPTION: Trade Journal Article Maker R ailw ay 'i ,<r "v` , 3K Contract , ,!i; ri `, ' ..- ^ "n^..r^r % . W V '*. _it;fflTn( . . ,- | , \ .' f1-' 'V < ", ^n;-*.'%V, ' N,wr-;>"^ ' ; -^' fttf, s ^ i%~ -s M a r in e *> <4- V '\ W . M ' VU'*r ift '*'( S ~ w t r / a.; . - ' - A V V V V ", - V M .I ' yT< f i I 1* ' ., <** : . r i i ' 1{*' *' . fe v ' . . <, * ; t '. f ... , (. > H ^ J Th Boiler M aker Vin t mi XXXI X i MH H 7 PLi u I a l i t i ) M ontili) In ilio Siiiiimiiis-HonrJiiioti l 'ul.litliing C o n , p a m . 34 ,\ T l h <,'r > i: tal S l r . e l , Fas i Stroudslnirg. I>a,, ,, i l i , K\cc utive Ollic.s at 30 C h u rch JM rre t, Noiv ork Ci l). Eduard A. Si mmo ns , 1`r r s i J e n t . He nr v l e e , Vice -Pr es ide nt . C. H. Mills Vice Presiden!. 1.. B. S h e r m a n . Vice -Pres iden t. Sa m uel O. Dun n, Vire-Pre'-ident f . H. I linnipson, Vic e-Pre sid ent . Rov V. Wrig ht. Se c re ta r) . J o h n T. De Mott, Treasurer. George Slate, Business Manager. ' Chicaco: IOS W. A d a m s Stree t. Washin gto n. D. C . : 17th an d H Streets, N. U' Clevelj ml : T e r m in a l To w er. San Francisco, C a l .: 215 .Market Street. ' 5uhscriptum Fr ir e : U n i t ed Sta tes, C a n a da and Mexico. $".00, Foreign Countries J3.0O a Vear. Single Copies, 35 Cents. * * Request for c ha nge of a ddr es s sh ould reac h us on or before th e 15th of (he month preceding th e issue w i t h wh ic h it is to go into effect. It is difficult and often impossible, to supply hack numbers to replace those undelivered through failure to send advance notice. In sending us change of address please he sure to send us your old address as well a s th e new one * The Ihm m M aker is a m e m b e r of th e Ass ociated Business Pa p e rs , Inc. `A. B- P.1, an d th e A u di t Bu re a u of Circulations, (A. R. (;.) Editorial St a f f : H. II. Bro wn , Editor, l.unihard. Associate Editor. E. S. Blodgett, Managing Editor. W. cao i iiji a id the -mu r edge ot the plate w-m hi huit a^a n u the edge m| the llailge at the -ides of the hucket. A u table number nf rivets were then inserted ; i hold : he P ates together 'j h < UK' 111n1 tit ro-i llo iY e m e n :. while it mav e con- Contents Editorial Comment General: Page 173 No rthern Pacific Rules for Boiler Insp ec tio n a n d Test .................... Combustion S te am G e n e r a to r ................................................. ...................................... Baldwin Locomotive Works Celebrates Its Centenniai ^ ' ^ ork of th e Boiler Code Co m m it te e ................................................. " Twisting Angles and Straightening Twisted Angles ......................... Boiler Steels an d O t h e r Soft Steels ................................................ [ ........................ Locomotive Boiler St re ng th F o r m u l a s .................. 1 . ! ! ! ! 1! * . ! ! ! ! ! ...................... Devel opm en t a n d A p p l i c a t io n of Fusion Welding in Pressure VexVeli Revisions a n d A d d e n d a to t h e Boiler C o n d u c t i o n Code .................... Pipe Fi ttings f o r W elding ............................................................ .................... Obsolr-t<* Sh op E q u i p m e n t ................................................................ ' * New Ball T r a n s f e r .............................................................................. ......................... Campbell Cut-Off M a chi ne .................................................................... Portable R o ta ry A ir G r in de r .............................................................. Jommi m o t i o n s : Crane Bucket Re pa irs ............................................................................. I.t>ttiil of C a m be r Line ............................................................ * v) i k s i i o n s and A n s w er s : Limit of H y dr os ta tic Test .............................................................. Lay ouI of T a p e r e d Sp ira l .................................................................. Dev el op me nt of F ir e bo x Cracks ............................................................ L ?-e of L og a r it h m T a b l e s ......................................................................... j .................... Associ vtions 174 1177a7 1i;3n2 1H3 191 192 193 193 191 194 11^955 196 196 1199.73 199 'F.LKCTi d Boiler P atents 200 Communications Crane B ucket Repairs To t h e E d i t o r : At one of the locomotive shops in Florida, we have a ocomotive crane equipped with a bucket used to handle :oal and other material around the shops. For many ears rye had experienced difficulty with this bucket due o the tact that it was frequently damaged when dropped m the rails. The bottom of the bucket would be bent nit of shape, necessitating its removal from the crane, t then would be taken to the shop, taken apart and traightened. The accompanying sketch shows the application of re al orcement plates which were applied to the crane ticket about three years ago and since that time the nicket has not been brought into the shop for repairs, n re-inforcing the bucket, j^-inch metal was used, this eing rolled into the shape of the bucket and applied as nthcated in the sketch. It was so placed that the end *- -i- -i r - .........i t ..............., . sidered as expensive at the time of application, has, in this case at least, saved both time and monev in the lonorun. Jacksonville, Ma. C hris H axdlke, Jr. Layout of Camber Line To t h e E d i t o r : There are many different methods of laying out the camber line on a plate and I am sending one which I hope will be a help to layerouts. This method I have tound to be accurate and not very difficult to remember. First of all, draw a horizontal line l'-l' equal in length to the circumference of the small end of the frustum of the cone which you are going to make. Erect line 5-J perpendicular to it at center. Extend line 5-1 to .1/ to equal half the circumference of the large end. At .1/ erect a line at right angles to 5-M. -Text, with V as a center and radius equal to the height of the plate which will be the slope height of the frus tum of the cone, draw an arc to intersect the line drawn through M at the point K. Transfer the angle M -l'-K to l'-N-O and extend line l'-H to line 5-J. With T as interior of the boiler at every washing, bv the turch and mirror, must be as completely exam s possible, ami suitable rods and scrapers em- ;o detach scale which has not been dislodyed bv siting. ' ` S In addition to the usual report, the foreman in charge ft 'll keen notes on the condition of each boiler under S:h"is cnarge-. _ _ S The standard pressure for washing out is not less ^ that"190 pounds at a -kj-inch nozzle. % _.\r the roundhouses, flues will be expanded with I eroevod expander only and due rollers are not to be % except when new flues are being put in. I The lighting of a fire in the firebox is positively pro- | Whited except on the personal authority of the round- | home foreman, assistant roundhouse foreman, boiler t foreman, night roundhouse foreman, or hostler. The I ilove mentioned roundhouse men will be held person- I'illv responsible for injury to fireboxes due to firing up f locomotives without sufficient water in the boiler, jfc (To be continued) m g: Combustion f Steam Generator % Combustion Engineering Corporation. 200 Madison Avenue. Xew York, is now offering the Combustion ^ steam generator, a standard steam generating unit built if in various sizes and providing a wide range of capaciT ties at any desired conditions of steam temperature and %pressure. Detail designs have been completed for eight Csizes with capacities ranging from 70,000 to 400,000 f pounds of steam per hour, from and at 212 degrees F. ? As shown in the accompanying illustration, this de y sign combines in one unit all the elements required for l fuel burning, steam generation and superheating, heat | recovery and ash disposal. Those familiar with the t devel'ipment of pulverized-fuel firing and the history of steam generating practice will note that there are Tno novel or radical departures from fundamentals, but 7 rather that the design represents a highly compact and ;; simple arrangement of long and well established eleT meats. They will also note the apparent absence of the maze of pipes, headers, etc., exterior to the boiler casj; ing. with which such construction has become associated y in their minds. These pipes and headers essential for completing the circulating system of water walls are ( located entirely within the casing, where, in addition f- to performing their normal function as circulators, they j also serve as highly effective heat-absorbing surface. | A point of particular interest is the entire absence of | openings through the casing. Such openings are or| dinarily required for the ingress and egress of wall tubes and headers. They are never perfectly sealed and consequently permit the discharge of dust during sootj blowing operations as well as the inflow of air dur1 mg normal operation. The Combustion steam genera7. tor casing is air-tight and dust-tight throughout. \ All four walls of the furnace are water-cooled, each ,v wall being composed of a solid row of tubes with only ; sufactent space between them for construction requireDiems. The water-wall feeder and delivery tubes, at the bottom and top of the furnace respectively, com ; i'k-n- the heating surface of the furnace proper nearly aH<'. which is exposed to radiant as well as convee- tmn heat. I''.- result of this arrangement of wall tubes and Sect i onal si de el evat i on of Combus t i on s t e a m ge n e r a t o r showing t he principal par t s and a r r a n g e m e n t of el ement s to the exclusion of exposed refractories and having the maximum attainable quantity of contained water with provision for the highest possible freedom of circulation. This type of furnace is perfectly adapted to the corner-tangential system of firing which produces in tense turbulence with extreme rapidity of combustion and correspondingly high temperatures; these high tem peratures being the result (not the cause) of the high rates of combustion. * Another feature of interest is the superheater by pass damper which affords a unique and much needed means of control mg superheat temperature. Adequate space is provided for the superheater which is so lo cated in the assembly as to permit of simple supports and a degree of accessibility unusual in boiler con struction. The first unit of this new design to be installed in America has now been in operation for several months in the plant of a leading industrial company. In overall results and case and dependableness of operation, its performance has set an exceptionally high standard. R- F Fret/, has been transferred from the Reading district and will assume charge of the Pittsburgh dis trict in place of \\ yman Howells who will now direct the activities of the Reading district. The Babcock &- \\ ficox Company, Xew York, has acquired non-exclusive licenses under the automatic arc-welding patents of the Automatic Arc Welding Company, Xew Aork. The initial payment for such