Document 7O90xYXNxpLxg6eQ0eME4D9me

FILE NAME: ICI (ICI) DATE: 1967 Apr 19 DOC#: ICI027 DOCUMENT DESCRIPTION: Memo P tZcuacT r / '3 ::vs L . P>. S t'.^ .^ 7 MAifiJS - SrAC>: t czAi 21 These cc.-aer.c..ents ato cade to permit the usa o Asbestos--fr e e in su latio n in plaoo o f calcium s i l i c a t e and asb esto s cecen t. Part 1 - Sutn lv onl v c f Cr.lciur: S i l i c a t e Tr.sulation i.l Moulded C a lciu c S i l i r a t o Ir.su latlo r. lo u lccci C b lc v S --Icr^tc t a jo s t e s --f r co E n a n c is c h l l bo u se d i n p i t e e o f C alciu a S ilie t t e as s p e c ifie d . S\ Par- I I - Am i l cat ion. ? iyir.fr ar.d P ro te c tio n o f C alciu a S i l i c a t a Thermal In su latio n 1.1 Caldura S ilic a te The in su la tio n s h a ll be Magnesia 60 supplied by the Chemical and In su la tin g Company, D arlin gton , and s h a ll be w holly fr e e of asbestos. A lte r n a tiv e c a t e n a l s cay only be used w ith the approval o f the Company,. Where Calcium S i l i c a t e i s mentioned in t h l* S p e c ific a tio n , i t s h a ll be taken to be Magnesia 66. 1.2 Protective Ccatin^ P ro tective coating applied over the in su latio n sh a ll be Conposition 14 as supplied by tho Chemical In s u la tin g Conpary, D arlington and s h a l l be w holly fre e of asbestos. A lte rn a tiv e ca te ria la nay only be used w ith the approval o f the Company. 1 .4 Asbestos Cloth _______9 a m C la s s clo th s h a ll be used a t expansion jo in ts' and s h a l l be Ty g la s s X 326A cade by Potherg i l l and Kartfey, orjaa^e quival ent o a te r ia l. > 2 .2 M attresses U attresses s h a ll be cado iro n g la ss d o t h w ith the weather su rfa c e cluni r i s e d ;. Tho f i l l i n g cay be Magnesia 66 or cim erai wool o r g la ss wool as ap p rop riate. Where the ten ter tu re exceeds the maximum quoted by the manufacturer fo r the g la ss c lo th , a ce ta l covered removable box s h a ll be used. J. Protection apain3t Oil Stillage11 (a) lig h t gauge crisped aluminium with a paper backing is not acceptable, Aluminium, i f used, must be painted on the inner surface. Light gauge stainless steel is also suitable. 6. Pines w ith Steam or E l e c t r ic T ra c in g The b rig h t aluminium f o i l used to wrap pipe and tra ce r s h a ll be-.not le s s than A6 swg. ADPZM)UM Special P ro tectio n fo r Hot A u ste n itic S te e l Su rfaces The aluniniua f o i l sh a ll be not le s s than 46 EW- I t i s recommended that the in su la tio n on pip^c, v a lv e s e t c . , cade o f a u ste n itic s te e l should ba w aterproofed The method giver, under "P ro te c tio n ag ain st O il S p illa g e " in S ectio n 3 would be suitablo-.* r MEDt- R o ch d a le I x . h . C. f-'-ann. A .l/E G To: EAE C o p ie a : ACK/WXD/EBQ 19th April, 1967. / H.M. D ockyard , B ev o n p o rt / Many th a n k s f o r y o u r memo' o f 1 4 th A p r i l r e p o r t i n g th e cu rre n t el s ta tio n w ith reg ard to the lim ite d t r i a l o f o u r ZA.136 on th e "Torquay* r / 'v. C e r t a i n l y f o r t h e p r e s e n t th e om ens c o n tin u e t o -9 lo o k fa v o u ra b le and o b v io u sly when the T o rq u a y T I s .b a c k I n P o r t i n Ju n e Dr* W. K ./D o n ald so n w i l l n e e d t o v i s i t - ^ , th e v e s s e l with* you in o r d e r to examine th e i n s t a l l a t i o n in detail* I f you a f r e 'a b le /to o b ta in a ' copy o f t h e officiai? r e p o r t fro m Mr** Sapoon. w iio . y f vyuuoa. w i l l b1e h elp fu l to u s. r * --* 1 *?|ev . S. M arks.