Document 1Q3r0Ez8JB4B93OamjdqjxNYq

FILE NAME: ICI (ICI) DATE: 1967 Mar 9 DOC#: ICI026 DOCUMENT DESCRIPTION: Memo IMA -- WAmnozai ?/7J7-f RECEIVED j10 MAR 1967 JE A . X . MESEALL - JtR tt. A C . UMUf - I B A ^ c . JW KB/GRP LSH/CJ Effl/QE Bth March, 1967 ^ FER IA L CHEMICAL IXPUST8 IB 3 LTD ACRICULTOAL DIVISICB Wa hare at tha praaeat tin* boot three contract enqnlrlaa agalnet project* which ara aponaorad by 11.0 -C. and Plaatloa IdYlaiona of I.C.I. and tha epeoifioatlcna cflna fairly oiearly tha uee af anbeotoo-fi m iaaulatlon and mention ia alao made of ocmpoaitionj and tha substitution of glass doth for asbestos cloth Tha currant proJacta may ba worth aarne 500/700,000, inrolTing perhaps about 200,000 of insulation. 1 .1 . & C.Co.Ltd will not, at tha present tima, ba abla to offar an alternatira aabaatoa-froe calcium ailioate and thin seams to ba tha pod ticn as far as J.H.h. axa ooncernad, therefoxa, It would appear that tha Chanleal A Inaulation Company Ltd, Darlington, atanda arary chanca of securing this business. Haturally, wa ara intaroatad lr *^ 6 altoraatlyea vKlch TBA* can offer against Fotharrgill & Harrey* a glaaa do t h and va will certainly oo-operate to tha full in puttina forward an nabaatoa-fxaa BD 2, aa and T o llab le.-- Enclosed la a copy of a specifioation, which haa baan extractad iron a contract enquiry raoeived by M-I & C.Co.Ltd. End. R0BH2T H. i WHJ9C8 i I i o I * jSr^r A r.. H3SRIAL CHEMICAL HSCSTRIES 1X1ZI7TD AcarrsarguRAL d iv is io n TEMPORARY SPECIFICATION FOR PgOJgCTgfeg ( I . P . STZAM KAIKS. STAGS I ) THE AFPlJCATION OP tjlWQAL ttOOL IKS'JLVIION AXD ITS H3GTECTIO:V WITH IETAL CIADDIXO. - PIPES ONLY 1 . MATERIALS A l l m a tr r ia la ccr/rrrO b y t h i s S p e c i f i c a t i o n s h a l l b e new and o h a l l c o n fo r a w it h th e d e t a i l s ^JLven b e lo w . D aring d e liv e r y , o ff -lo a d in g and sto ra g e on s i t e , a l l m a ter ia ls s h a ll be a d eq u a tely p rotected from th e w ea th er and a ech a n lo a l damage, to th e s a t is f a c t io n o f th e Company. 1 .1 In su la tin g M aterials The in su la tin g m aterials s h a ll be m ineral w ool ( S t illa g T herbloc or E ld o r ite ) o f d en sity betweeq 14 and lfi l b . / o u . f t . in the fo r a o f preform ed slab s', la g s or pipe s e c tio n s . I t s h a ll be o h e c io a lly in e r t , r o t and verm in p r o o f. I t s h a ll co n ta in n o t more th a n 2^6 by w e ig h t o f o r g a n ic b in d e r . The t o t a l su lp h u r compounds s h a l l n o t e x c e e d j$i m easured aa s u lp h u r . 1 .2 F ix in g and P r o te c tin g M a te r ia ls (a ) S h eet Metal P r o te c tio n The metal sh eetin g s h a ll be a la r.in iu n o f com m ercial q u a lity to 3 .S . 1 4 7 0 : Cra.de (X ynal M35/1 - IC I M etals D i v i s i o n ) . The sh e e tin g a h a ll b e p r e tr e a t e d a t works by 'A lo c r o a ' p r o c e s s . On p ip e s up t o 12" o u t e r diam eter (in clu d in g th e in s u la tio n ) th e sh e e t s h a ll be n o t le a s than 24 swg. F o r p ip e s o v e r 12" d ia m e te r and up t o 24" th e s h e e t i n g s h a l l bo n o t . l e s s than 22 swg and fo r la r g e r d iam eter p ip e s n o t le a s than 20 swg s h a ll be u sed . For rem ovable co v ers and where m ech an ical damage ia l i k e l y to occur 1 6 swg s h e e t sh a ll be used. G alvanised m ild s t e e l s h e e tin g s h a ll n o t be used ex cep t when c a lle d fo r on th e Coapany*s o r d e r . When s o c a l l e d f o r th e s h e e t i n g s h a l l b e o f co m m ercial q u a lity h ot dipped or e le c tr o -g a lv a n is e d . The w eigh t o f zin c s h a ll be n o t le s s th an 0 .6 o z . / f t . 2 p er s i d e . G a lv a n ise d s h e e t in g a h a ll b e n o t l e s s than 2 4 awg f o r p ip e s up to 12" o u te r d ia m e te r ( in c l u d in g th e i n s u l a t i o n ) and 22 awg f o r p ip e s b etw een 12" and 24" o u te r d ia m e te r . F or la r g e r d ia m eter p ip e s n o t l e s s than 20 swg sh a ll be used. F or rem ovable covers and where m oohanical damagei s ll lc e l y to occu r 18 swg sheet- s h a l l b e u se d . ( b ) U etn l Banda F or u se w ith Aluminium C la d d in g , bands s h a l l b e In alum inium a l l o y to B .S . 1470 Grade JS4~jH and n o t l e s s than 22 swg. F or s e c u r in g m in era l w ool s e c t io n s to the p ipe the bands s h a l l be 1/2" w id e. For se c u r in g alum inium s h e e t s i n p o s i t io n bands s h a l l b e 1/2" w id e f o r p ip e s up t o 12" o u t e r diam eter (in clu d in g th e in s u la tio n ) and 3/4" wide fo r la r g e r d ia m eters. For use w ith g alvan ised m ild s t e e l sh eets bands a h a ll be g a lv a n ised s t e e l a tr ip not lo s s than 24 awg, j/2" w ide. S t a in le s s s t e e l bands i f s p e c if ie d s h a ll be n o t l e s s than 2 4 awg, 1/2" w ide - 2 (c) Screws For u se w ith a lu 2ird.ua s h e e t n e l f- ta p p in g c o r e a s h a l l he aluminium 1o B -S . l i .76 Cradr h 3 1 0 i n t h e f u l l y h e a t t r e a t e d 'c o n d t i o n . Vr.cn ga lv a n is'd n ild a teel aheet -is ip ea ifio d -e ta in le sa a te e l self-ta p p in g flernrp a lia li he u sed . ( d ) R i v e 13 H i v e t a f o r a lu m in iu m or.cn t; c h i l l h e a lu m in iu m t o 3 . S . 1 7 3 O rad e JB 5-0 . G alvanised r iv e ts s h a ll he used w ith g a lv a n ic e d o te c l c h e c t. (o ) Quick R elease P a ste n in c s jp > . y l ' ' F or use w ith a lu n in iu n s h e e t th e s e s h a ll ho alum inium a llo y to B .S . 1470 Grade KS-H. F o r use w ith g a lv a n ise d m ild s t e e l f a s t e n in g s sh a ll, h e o f m ild s t e e l and subsequently e le c tr o g a lv a n la c d . ( f ) S ealin g V n tcrials The se a lin g m aterial fo r use in lap jo in ts s h a ll he Pres tik S calin g S t r i p N o. 5^*3 =ado b y . Boa t i k .L td . a p p lie d n s a f l a t a t r i p l/ r th ic k and 1 /2 " w id e minimum.- Where r e s i s t a n c e t o a o lv o n ta i a r e q u ir e d Pro atile S o . 5 3 0 6 nay he u a ed . A lte r n a t iv e n& terl& la saiat h e a p p ro v ed b y th e Company, (g) nade (h ) T T eatherproofing 4 * The w eatherproofing c a stia fo r by A tlas P reserv a tiv e Co. L td . C la ss C loth , , ^ bends 0 t , \ \ . ,'. " . s h a ll he S ea lfa * liaatio \ ,'> !.* VafA. . j f'. ' H i *. . . *. 1 3 1 /5 7 S h a ll be g la ss se r in C la ss C lo th No. 10 cade b y (Q Self-A dhcalve-Tanc clo th A tlas . ECX 705 c a d e P reservative . . by Turner Brother* or Co. L td . o r eq u ivalen t. . , f m . * S e lf-A d h e siv e tape s h a ll be o lo t h tap e A 6 l nade by Rotunda U n ite d or eq u ivalen t. T - : - . . % Vi 2 ^ applicatio n , , r *: r m * 51 . The in su la tio n a la b s, la g s or se c tio n s s h a ll be h eld in c lo s e contact w ith th e pipe to he in su la te d by scan s o f bands. Fach p ie c e o f in su la tio n s h a l l h e h e ld by a t l e a s t two t i e s e x c e p t a t b e n d s w h e r e s n a i l m itred p i e c e s may r e q u i r e o n ly one t i e . F o r s n a i l p i e c e s g a l v a n i s e d s o f t ir o n w ir e 13 awg t i e s nay be u se d . Where more than ono la y e r o f in s u la t i o n ia a p p lie d th e jo in ts fo r any one la y e r s h a ll n ot co in cid e w ith the jo in ts o f any other la y e r . The in s u la t io n s h a l l be b u tte d up t i g h t l y a g a in s t r.eigb b ou rin g p i e c e s and r.o l a r g e g a p s e h a l i bo p e r m it t e d . S m a ll g a p s a h a l l b o f i l l e d w ith lo o s e n in era1 w ool. I n s u la tio n a h a ll bo stop p ed sh o r t o f fla n g e s o f s u f f i c i e n t d ista n c e to perm it w ithdraw al of b o lt s . r. On v e r t i c a l l i n e s 1 2 ' and g r e e t e r i n le n g t h i n s o l a t i o n s u p p o r t s s h a l l oe p ro v id ed . Those s n a i l c o n s is t o i neto.1 r in g s and p a r t r in g s a t in t e r v a ls not g r e a te r than 1 2 '. The supports s h a ll bo w elded o r claap ed to th e p ip e as . d i r e c t e d by th e Company. The nupporta' s h a l l p e n e t r a t e th e i n s u l a t i o n to a d is t a n c e oi* l/ 2 " f r o a t h e o u t e r s u r f a c e . 2 .2 S t r a ir h t P in e Huna The p ip e s s h a l l bo co v e r e d w it h n o t a l to tl-.o s p e c i f ie d g a u g e . * B oth l o n g i t u d i n a l an a a i r c o n f e r c u t i n i o v e r la p s s h a l l b e a n in ic u a o f 2" '. A l l jo in ts s h a ll b t nada s o a s to shad w a te r and lo n g itu d in a l la p s a h a ll be slig h tly o ffs e t t ad jacen t p iecoa. The cla d d in g s n a il be fa ste n e d in p la c e w ith a lu n in iu n str a p s and s e a l s a t ST c e n t r e s . On v e r t i c a l l i n e s a m in im a o f J*. a l u o i n i u n a e l f tig h ten in g screw s s h a ll bo f it t e d a t circu m feren tia l jo in ts . The screw s s h a ll e it h e r pass through a band or be p o sitio n e d im m ediately below on e. . Where ex p a n sio n J o in t s a r e r e q u ir e d sc r e w s w i l l be o n it ted and r e p la c e d w ith 'Z' d i p s . V e r tic a l lo n g itu d in a l Join ts and a l l c ir c u n fe r e n tia l jo in ts s h a ll be sea led w ith a con tin u ou s s t r ip o f P r e s tik . A t c ir c u m fe r e n tia l jo in ts below bends, th e P r e stik s h a ll be f it t e d on th e c o a tin g o f th e bend ao a s to f i l l th e open end o f th e j o i n t . T h is i s to en su re th a t w a ter ca n n o t c o l l e c t in th e gap b etw een th e j a c k e t in g and th e c o v e r a t th e b en d . S e lf-a d h e s iv e d o t h tape s h a ll b e s p ir a lly wrapped over th e I n s u la tio n bends w it h a n in ia u a o f 1 /2 - o v e r la p a t j o i n t s . The c lo t h a h a ll, be* g iv e n ATtr o w e l c o a t o f w e a t h e r p r o o f in g o o s t i o and a l a y e r o f g l a s s a c r i d d o t h a h a ll b o embedded I n t h e w e t s a te r i a l . When th e f i r s t c o a t l a ' d r ^ a seco n d brush c o a t o f m aatla s h a ll b e a p p lie d . a h a ll bo approxim ately l/l& . . * . .-IT- ho w et film '' I th ick n ess o f eaon o o a t> * Benda alu aln l'i- bo coverod before ad jacen t ctra ig h t se c tio n s so th a t the *:i a p p lied w ith a oinim ua o f y o v erla p on to p o f the fin ir - . 2 4 F ian ces and V alves 71anges and v a lv e s s h a ll be covered w ith recovab le boxes lin e d w ith fle x ib le m ineral wool faced w ith w ire n e ttin g . C i boxes s h a ll b s fa b r i cated g e n e r a lly In accordance w ith ICI S p e c if !c a tio n H5001, 2 .5 P ip e S u p p o r ts Pipe hangers fo r o u tsid e use s h a ll be provided w ith a v/esth er hood as i l l u s t r a t e d in IC I S p e c if ic a t i o n L'5001, F ig u r e 3 . P ip e 'r o lle r s o r S lip p e r aupports a h a ll b e tr e a te d g e n e r a lly aa shown in .IC I S p e c ific a tio n -5001j Figure 6. 3 .6 S t a i n l --* S t e e l E q u ip m en t B efore the a p p lic a tio n o f the in s u la tio n o f s ta in le s s s t e e l p ip e ard ` e q u ip a f n t s h a l l be w rapped w ith a lu m in iu m f o i l .o f a p p r o x im a t e ly 1*6 sw g. F o il a h a ll be f i t t e d w ith la p s so as to ahed w a ter and th e o v erla p a t jo in ts a h n l l be a m in i cun o f 2". A t f l a n g e s , v a lv e n e t c . t h e f o i l s h a l l b e f i t t e d anugly a g a in s t th e s t e o l su rfa o o and h e ld in p la c e v/ith w ire t i e s , on pipoa w ire tiea or bands s h a ll be used where n ecessa ry .