Document 4JYaGJboXKYBmyO06x4MyQdKV

r" LIA09875 .-t. v .Jm ISac8!SSf &iss2 fnaesis *ss*^;&sasl . S preeata k< fey tha Re-dso ChssZ^sl Gxr?p fW *39 ssssjtestess? "? ps:r* ; '2ir r*;c*i that Uv nlteie tcU Its fcqyt tTK^USSS*savs in vs;:.. < FiW.; :..- -3 i*,:!'- r 5S etlT rla kU fot tide pgr^s-ssc is efeswi s syr/. icy-' ... te.ro tx t',..-:i.r ',iro Kste^-s? tanks. each coaicisiag 650 ccllxsc c;? t,V.s# i&css, iis fes3.<l Is fc:ir r : fg y?.aur (5 to 10 p*s*i.) frw the tsa.%8 \s> its dsssiCasfciao throng fiicialeea steal pipe* cad fittings* -1? ' Rwejfrsrlc acid oaa first used in ths procrinf of psadeiUln* * pipir>3 then kse4 wsj J/u la. stainless steal XL sftlcfa -sv sailsfseiory eirr'ficee Later tb process ** titered so that mlfuric nsa used instead of pi-asotoria scid. Sot arrtlcip*tl'ig *nr trouble, the XL stainless piping as rstaisad* She operator* Utmrd In a abort while that their antieipstien* wt (rrrrlj epUai^ tie -- the XL corroded and eceaenced lsakinp ralftarle acid. The ltfc** wry not nfflcicat to disrupt the process, Therefore, since ths initial dost of piping 1Retail ation aa coneldartblj , it was decidad to retain tbs Joi so lccg u possible. SLwrrw, another tors earteas difficulty arose. Tbs sulf^rio sold driepad ea ths cer.ont supporting the two beery tanks causing tha Cesc.'.-rt to 63t*rior*ts to sues a degree thet fear j bold for Its physical strength. Boffer* lone, brei&>'-cn of the flooring rropressed to ths extent that it deopsrdiced ths safety of tb* **n and equijaert on tho floor bole* the tanks, Kaatrtllting ethods were used to no avail. faced with this potential threat to their rplp ant ss *tll ss proee**, ths engineers st Hayden decided to tek* teodista action. first they sitetfesd the sortcs of thsir prefeler.-?, t*a %&*". wa 35W This mm selvas! by UkstCsc the >& sad oenfletsly rrfittl?? titi> 4 to hats -- ? if-.vitas Isdsr -- ha been ssrviAg ii# ptr^eH, in 6*.i * 1 protset thanks'; ves li-a any p'*-s?ibility of recurrence and fsir," . r de. :,,* t$ thetr floorI.; tbf; to iuytsll s la/^e lead pan oosjil visly 5>'v& *r under tx , '.m vc.:-.scl8. In this sanner acid tfrippte> fj-. -i ?..:r ei`-crt-s ild b* eaui 'it end retslnsa fey the lard pan thereby protecting ten s to frs^s > .^ N3129 LIA09876 ) j ;i .V Vssr crew a St ;' " ly> farter ettJxHb Uaa pas t |&1 ts Xdad drain so tawi e**r *Sid dnhr^sa ta fco r' -u If aft4 R}' &* ta ndc phsecsties, fits && jssa is f*'i:y;:-:j,C?:' m*4ff6 s~w3 t&Afe we.r# . -. . ... .... . , fs it* bri ^KftSw tn.\? cc*i the idd basfiid is lm&Z&zad- * tSk sa4 tm& pvjve?,? tS# bs? is V 4 vise ?moa f lead Is pa. wees ia m&tata eaksKs id teflEitsiy ' ';?j*ea ill fesevjr enisle ess* - '-4- -: .*: -issaassls is ws&*tll2B acS ewaist-rt. s t^?6 is clotted tsms-4 fescs&g; _ ' -i iu-Es es&e Ea ssasta&a Star tte t^oo SUh sad stetclnse itasi , ' **' JK .tSsoa^sak ftl {**& V' ;.. *. ' -.- r 'r CMBragggggg gS.S " Y '" f&s lead pan eoaelata of fear sections of 12-lb. h<saical lead beresd together to fora a coniines chs-t 7* ft. vide end 17 ft. long. Ill tho ee-isaa ore lapsed 8 fes A bltesistic l\y<r protects the pan fran direct contact ts&fch the eoctrste fleering, To pai<- lir- k-in. high retaining walls, separate soe- i ton of 12-lb, lead were btrrwd on, Vv.t> turned up end lapped ever the up^ur ,. j od; of a k-in. angle frsaa in front and on one aide. Za back and cm the other aide, the edges arc turned op against tho walla, is an added protection i against vibration, the heavy tanka rr cupported on eight circular discs of i ?k-lb. load, Ik In. in dlaccter. Thu p-n is graded to a drain share any acid leaking frea tho fittings can be washed rimy. For added rigidity the floor i drain is constructed of k-ln. pipe nado of 3 per coot antisocial lead. Flps lines passing through the pan and concrete floor aro gu'xdcd against splashing and overflowing liquids by a 16-lb. soft lead boot or aleuvs, o in. high and 6 ifl 1*0* i . I r (Sac drarinc}* \ .'3 oovaosmts i I: \ f the Keyden Chcnleal Corp. adopted a sinpla nethod of protecting their concrete flooring free sulfuric acid attack by taking advantage of the tl*e-tcited resistance to this sold offered by lead. Their cxpcri.ncc with atainlcsa steel 30k, on alloy containing about 20f Or, loi Xi and Tf> ita, illustrates thit caro cast be exercised when specify iJ. ing stainless steel for anti-corrosion purposes* The core msec* stainless steal, docs not iaply ccoplotc inaunity to corrosion. ' The following stainless stools arc not reoomonded for uss with sulfuric acid (10* to 7$*)i 30?, 303, 30k, 30ffp10, kl6, and k30, ( ii i i I fc.-w,ja*^r-4|S^rJSftSKh^. >1 I "1 LIA09877 1 4- TUB WALL -: I' .^''' ' 'X '* pstreet e&i&iiZ5JimsJH-?i'- TMSSKfSM MM ****[*;**'.*;t* W CS*U:S-*4 L9. UAO ty5VCTJ KM 1AMK LOS noon bolt* V4" AMGLC WOK tXAO LAAPCO OV*R r, IS POUNO CMCMICAL IXAO TILE WAUL" amjwLrnc X IX ; ^ 14 WpoWne VlcAa0o \Wy noon bolt fm .......n-- >/77777/7/////777777AV/////77yy7//7ty/y7777777Z\ SECTION *A-A* '-nuMAsnc wr. HHMU 0CT0BM.N4# LEAD INDUSTRIES ASSOCIATION 410 IXAMOTOM Avt. NEW YCMCJT%t7Mt lead safe ran under CHEMICAL EQUIPMENT BO* -r'A*?-1 ywr ri;yuj^giyt l,l wbe * < "i