Document mmMEX4O8w2854732YNg8y5Oyk

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 k U 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 k s e4 w s j 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 s o r t c s of thsir prefeler.-?, t*a %&*" . wa 35W This mm selvas! by Uk s t Cs c 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 > .^ 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- ton of 12-lb, lead were btrrwd on, Vv.t> turned up end lapped ever the up^ur ,. i i 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 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}* I: \ .'3 oovaosmts \ f i 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 bo l t * V4" AMGLC WOK tXAO LAAPCO OV*R r, IS POUNO CMCMICAL IXAO TILE WAUL" noon bo l t amjwLrnc X IX ; ^ 14 WpoWne Vl cAa0o \Wy fm .......n-- >/77777/7/////777777AV/////77yy7//7ty/y7777777Z\ SECTION *A-A* '-nuMAsnc wr. HHMU 0CT0BM.N4# LEAD INDUSTRIES ASSOCIATION l ead saf e r an under CHEMICAL EQUIPMENT 410 IXAMOTOM Avt. NEW YCMCJT%t7Mt BO* -r'A*?-1 ywr ri;yuj^giyt l ,l w b e * < "i