5.7 R BEVIEW. [Fob. 16, 1029.

Huinplirics, Mr. E. Af. Clnrk, and 3lr. T. 9. Cooko, ant1 ni:ing otliers connected wit11 tho Stnndnrd Oil Compniiy, of Inclinnn, sntisfnctory rcsults would never havo bccn secured.

STANDARDISATION OF JACKETED PANS.

Tho Sub-Comniitteo nppoinkd by tlio Joillt Itescnrcli Gonirnittco of tho Associiition of Britisli Cheinicnl I\l:inufncturers and tho Uritisli Clieiliical l'lnut Nnnufiicturors' hsocintion t o consider tho standnrdisation of steam-jnckctcd pnlis, 11ns tlorotcd, i n tho first place, its nttentioii to cnst- iron pnns, ns tlicso nro in tho most urgent nccd of stnndardisntioii. IVitli tho objcct of designing n etniiclnrd pan of ni;isinium eflicicncy i n rcspcct of lientirig surface, working capacity, and atrcngtli, it series of drii\villgs sliowing vnrious slinpcs :uid ilniiges was sent to chcniicnl iniinufncturers ; n p r k i s of tho replies 5vi18 forivcirdcd to t110 plnnt IliiikerS, irnd their npproval of tlic sottied designs solicitcxl. As :I result of tile inquiry it WIW ngrccd tlint

tlro stnndard working capacity (i.c., tho Iienting ciipncity) for tlio types of castiron nnd ~cnumcllcd cristiron patis sclcctcd sliould be cnlcu1:itcd froni tho undcrsido of tlio bolting-fliingo of tho liiicr. Tho :Ictunl cnpacity is greater, e.y., tlic dce pan of 2.5 gn~loi is 11ns an actual c:ipacity of 34 giif;oiis; so tlint in Cuturo n inanufiicturer will know tlint 110 can work 15 gnllons in n standnrd 25-gnllou pan, rind riot n h u t 18 giillons 3s Iiitlierto.

After very carcful csnmin:ition tho Comrnittco lins decicled to adopt n two-radii pan. The metal being cast-iron, i t ivns found iinpossiblo to stipulnto on0 thicknetis ; to surniount this ditliculty, aird nlso t o nllow for n liiglicr working pressure, tho Sub- Conrmitteo lins hiid down liinite of tliicknes. For c1 working pressiiro of 3.5 lb. tho tliiclcness of tlio motiil must bo witliiii tho limits stated, but for n 4 0 4 . or 45411. ~0r1ii11g prcssuro tho thickness must bo the outsido limit stilted on tho drarvingtj.

Tho Conimittco 1i:is nlso considered tlio possibilitJ- of fitting vrouglit-inetiil linings to tho jiickcts, but lins conio rcluctnntly to tlio concliision t l i n t i t would bo impossiblo to design cast-iron jncltets for ull tlie sizaj considered thn t could bc fittad with sucll 'inings. It is suggcstcd, Iioivever, tliiit in tho dcep pnttcriis up to rind including tho 100-gallon pan, tho wrought-metal lirier could rcplaco t l i n t of cnst iron. Tlie cnst-iron liners liavo h e n designed for en:imclling, nnd tilo Committee d r w s :ittantioii t o tlio tliickeniiig of tho inctnl nt the flanges. 'l'his is considered to bo import:int, riiid cnlcul.itioiis liave bcon m:ide to :illow siillicicnt Inctiil so ns to cnsuru ~,rndiinl radiiition a t tho lion-lrcnted contact Ioiiits. 1110 edges linvo bmii roiindcd 6 0 tiint tlio inside Ldgo can bo ~vcll covorod with clmncl wliich will then not flake off \vlicn it stirrer is uscd. Tlio lugs lor tlio feot linvo all h e n cast on to tlio jncltot with :L strengtlieniiig wob, niid tliu iiilots and outlots liavo 1)ecn inndo to coiiform with tho sizes of tho pnns. It will 1 ~ ) iioticcd that tilo watcr drain is in tho centre of tlie bottom of tlio j:ickct iind not n t tliu sido as. hitliorto; i t is gc i iyd ly iigrccd t l i n t tilo la t ter prnctico is wrong. 1 lip stuuni distributor, whicli i s not slio~vii i n tho drawings, is best insertcd at tho bottoni., wlioro tlie stcnin sprico is grc:itcst niid ivlicro thcro 16 less risk of the liner expailding un- evenly. llosscs :ire cnst on tlio upper. edgo of tho jncket for safety-v:ilvo nncl air I~low-off. Slionld n chcmicnl m:lliufilctilrcr desiro tho stcn1ii-in1et on tho top, whiclr in tlio opinion of tlio C o n d t t c o is wrong, :I bnfllc-plntu niust Is insertcd. 'ri~eso stenm distributors 01' b n f f l e ~ liiivo not liccn considored, as tlio Committeo is of opinion t l i n t tlioy do not requiro stnndnrdising. Jii ovorg uisu tho etcniii

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spnco lins bccn cnrcfully cnlciilnted nnd graduated for s stenni-inlet n t tho bottom of tho pnii, so tha t fitcnrn cntering tho jiickct shnll cnuso tho rim of tciiipcrntirre to bc as &en .w possiblo.

Tho Suh-Coininittca desires to dmw spccinl ntten- tion to tho 75- and 100-g:illrp shnllow pans. It.Iins 1)ccn :iscertninecl t11:it cnst-iron nnd cnnnicllcd-I yon nro not :ilw:iys uscd for tlieso lnrgo sims, pnrticu- Inrly for tho 75-g:illon size. niicl the ~rnr i i i t t+w lins tliercforo designed tho 7S-gnllo11 linilig to fit into tlie 100-gnllon jacket, ninking orily one jacket nwmsnry for thew two sizcs. In this ~\.ny i t is liopetl to clispcnso with tlic stnridnrdisntiolt of niiotlicr unit. Attention is also drawn to the fact

2 ~ - g a l I o n CILV~ ~ I I S 11:iro nil tlio same dininetcr of flniigo on tho liner, SO t l i n t tho iinivcrtinl cnrcr, wliich tlio Coininittco is now designing, will fit tlirtn nll.

l'lic Cornniittce l in s nlso tnkori into coiisidorntion tho fact tlint tliis deep typo of pnn would innke nn ndrnirnblo still, nnd tho Snb-Conimittco is to cliwuss t h e question of providing tlicso pans witli oiitlets so t l i n t tiicy cnii Iw, converted iinmediately into stills, or stills into pnns, iisiiig tlio ono stanclnrtl covar.

Tho dvsigns given in tho report rcprcscnt the rrsiilts of tlic csnniinntion of n wry lnrgo nunihcr; c:ic*ll o m of tlicni lins 1)ccn cnrefirlly investig:itecl, c:ilc~~lntions of strengtli linvo been considord, nnd. in thc opinion of the Conimittco, tho specificntions proposed will cnsiiro pl:ilit of innsiiniim efficiency.

'I'lic* Sub-Committee suggests tho adoption of t i l o following tests, nnd tlint :I ccrtificnto ernbodying tlio rcsults 110 issued with evcry pan:-

Cast-iron Stmni-jac1:ct ed Puns. A. For :I working prcssuro of 35 Ib. por sclunru

inch (dinpo ns in c1r:iwiiigs) :-Thickness of niotal to 110 witliiri the liinit d a t e d on tho drnwiiigs; Iiydr:iulic tcst, 75 lb. per sq. in.; stenm test a t working presswe for n t least li:~lf-nn-lionr.

li. Por working prcssuru of 4 0 4 8 Ib. (slinpo as i n clriiwings) :-'l'l~iclcn~s of metnl to Iw, tho greater tliicltnc~s st:itcd on driiwings; liydrnrilic test, 90 11. pcr sq. 111. ; stcniii test, 45 Ib. por w. in. for half-an- Iiour.

E n a in el led Cud -iron Sto ndard St ea ni-jacl:ef ed Puns.

Tests ns :tbovo. witli tho exception of tho steam tcst, wliicli is to IJO npplicxl n6 follo\vs:-The pnn to 110 fillctl to limit cnp:icity with cold wntcr, stonni to 110 npplicd to tho lncket n t tho working pressure, rind tlio contents hi lcd. After boiling from 5 to 10 minutes tlio water t o bo removed niid tho stenni to Int kept :ipplied for n t lqnst 15 minutes t o show up pidiolcs, fliiking or crazing.

The nhovo is tho substance of tho introduction to tlio report, which also contnins D table of rcificd ciinionsionti nnd iiiiio drnwings of t ~ i o foliowing siws of cnaiiiellcd, cast-iron, stniidnrd stcnni- jacketed p:ins :-

\Yurkler mp;icltp. Actunl eapnclty. g:lllOIM. gullolu.

10 .. .. .. .. .. .. 16 25 .. .. .. .. .. .. 34 6U .. .. .. .. .. .. 03

100 . . . . . . . . . . . . 128 160 .. .. .. .. .. .. 1wI 200 . . . . . . . . . . . . "33

!s .. .. .. .. .. .. 43 60 .. .. .. .. .. .. 7:i 75 .. .. .. .. .. .. 112

100 .. .. ,. .. .. .. 130

Tho tnblo of clinicnsion.9 niicl tlirce tln;isings iiru roprotlircod on tliu follo\ving pngcs. '1'110 ful l rcliort iiiiiy bo obtriiiicd froin tlio Ihitisli C1icniic:il I'liiiit Miiniifrictnrors' Aesoci:itioii, n~ 166, Yicenclilly, London, I!'. 1, pricu 2s. Ud.

tho 5O-gnl?oll Sl l i I l lOW 1XIll Sllld tllQ 100-, 160- nlld

0

Slr.trrow Tvl%.

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