Document YjDD52b7zGKGnZz67RMveyqa8

FILE NAME: General Electric (GE) DATE: 1990 DOC#: GE103 DOCUMENT DESCRIPTION: GE Technical Information Letter with Cover Letter few Ge'wtJtw QtCtfMnt Ge-**I'm*$i+y"c Ci^nojfty lv*nvIj"f*.\(il}*ti i-'Cif J?5 *JJS-,:J5b' GE Industry Sates & Services February 13, 1990 PG&E Pittsburg Power Plant P.O. Box 590 Pittsburg, C 94565 Attn: Date Murdock Plant Manager SUBJECT: TIL 1052-4 ASBESTOS CONTAINING MATERIALS IN TURBINE-GENERATORS S T E M TURBINE S/N(S)99070*t ,,__ , ,__ ,, <fl838& Dear Mr. Murdock: The attached TIL discusses the potential presence of asbestos containing materials associated with the Steam Turbine, Generator, and various auxiliary components. Please review and file in an appropriate location for future reference. Regards, Service Supervisor (415) 539-5354 \mk - attachment GE POW 002467 OB POWER GHBRATION 1 RI7BR ROAD 8CHBK1CTADY, NT 123 4 9 OB POWER GENERATION CU8TOHSR 8IRVICI TIL 1052-4 TECHNICAL INFORMATION LETTER ASBE8TQB OKTAIHIBQ KATgRIAL IK WmBIHg-ggHgUATORBl Applicable to Steam Turbina-Generators EBIgg.W Tile purpose of this Technical Information Letter is to inform our customers of the possible locations of asbestos containing materials in General Electric steam turbine-generators manufactured for Utility and Industrial applications This information is being provided so that appropriate actions may be taken by each customer to comply with regulatory trends on this subject. The information provided is generic and applies to units in the "as-shipped" condition. Plaguggjpst The properties of asbestos make it desirable for applications such as in heat retention and sound deadening materials, electrical insulation systems, gasketing, stem packings, and shaft seals. Mon-asbestos containing materials with equivalent needed properties have not always been available for many applications- As the health hazards of asbestos were recognized, new non-asbestos materials for all turbine-generator applications became available that enabled the current turbine-generator shipments to be asbestos free. Table 1 generically lists the potential locations of materials containing asbestos in turbine-generators, as manufactured. The table is structured by material type, general locations, specific locations and with summary comments. Applications of the previously used asbestos and/or the presently used non-asbestos substitution are described as follows: 1. Heat retention material used for thermal insulation has been typically purchased to functional specifications from insulation vendors and field installed. In the early 1970`s, non-asbestos equivalent materials became available and the GE specifications were subsequently revised to prohibit the use of asbestos. The bulk of asbestos applied in turbine generators was used for heat retention application. Several types of asbestos free material are now commercially available for this application. COPYRIGHT GENERAL ELECTRIC COHPANY 1989 ism* Data: November 10, 1999 GE ROW 002468 -2 2. Sprayed-on sound insulating non-asbestos materials were developed but they had poor adhesion characteristics. Current metal lagging designs do not require sound insulation, other non-asbestos sound insulating materials are available for existing metal laggings if sound deadening is a requirement. 3. Spiral wound gaskets have a filler material captured by the metal strip. In the new unused condition, the filler is captive but after service and disassembly the metal strip may be broken and the filler material exposed. Spiral wound gaskets with non-asbestos filler materials have been developed to replace the asbestos type,and are now available from many sources. 4. Flat sheet gaskets axe used extensively for low pressure and low temperature sealing applications. As with the spiral wounds, asbestos containing materials have been used exclusively and the industry has only recently developed suitable non-asbestos replacements. Because of the wide range of environments (which include steam, water, oil, air, and hydrogen) where flat gaskets are used, several different asbestos containing materials have been utilized, similarly, the industry ha3 developed a variety of non-asbestos replacements but none are exact substitutes. Typically the non-asbestos products cannot bo directly substituted for the asbestos gaskets and long term specific application must be confirmed by laboratory tests and actual usage. 5. Stem packing (soft) and shaft 3eals have also become available for asbestos free applications. 6. Non-asbestos insulating materials for electrical insulation applications have been developed and used for the past several years. T*Hrtrmnmn<3ation: Generic information regarding possible locations of materials containing asbestos in turbine-generators has been provided as an aid to resolve any.actions that may arise as a result of this document. It is suggested that if non-asbestos material substitution is desired that th local GE Field Service Representative be contacted for specific material substitution definition and/or recommendations. When ordering replacement material, describe and/or provide as much detail information as possible that will help determine the correct replacement, in situations where the old-type asbestos containing materials a r e ordered by an old drawing number or a3 a non-catalog item, the correct replacement non-asbestos materials will be p r o v id e d . Catalog ordering numbers should be used whenever possible to assure the quickest response and delivery* e im GE POW 002469 GENERAL ECTRIC Turbin Marketing and Projects Operation Customer Service Department T ediatesi la to n n s tim U ttas Ha. 1 0 5 2 - A TABLE 1 ASBESTOS COHTAIHING MATERIAL IH TWBlKE-GEHERATOftS ASBESTOS CONTAIN MATERIAL type HEAT RETENTION MATERIAL ( i , s . Thermal Insul it ! on, L a g g in g ) som IKSUUTIW iS p ra y e d -o n ) POTENTIAL LOCATIONS GENERAL Hot Surf ices (p* MOF) Meta) L agging Iflttm a t S u rf act* SPECIFIC -H P/IP casing* Main s t e a l p ip in g Main s te u i valvas -A u x ilia ry tcaaar valvas -Hon r a tu m valv as -M oisture sap aratar and m oisture separator rah aatan -S u m packing exhauster -$t*M sa il aviporator -Secondary sta a * piping and valvas S U M d r Ivan o il puaps and re g u la to rs -Turbina anclosura -Emphasis Tagging -G enerator lagging -E x c ita tio n equipm ent lagging GASKETS - S p ir a ) Wound HP/IP C a sin g s LP I n n t r C asfn g (s) la in S ta in Piping n r MMft<WA7 n -B alance hoi a accass covers -61b access c o v tri Inspection hota accass covers -flortscope flin g * c o n n e c tio n s K ind h o lt accass covars -Borescope flange c o n n e c tio n s -In te rn a l piping -HP t h a n f la n g e s -RHT s h a l l fia n g a s -C rossover flanges -C rossaround fiangas -C ro m ro u n d r a il a f valva M ounting fian g as -C ro s s a ro u n d n lp ln g manway* COHMEHTS Asbasto* elim in ated fro 6E s p e c i f i c a tio n s e a rly 1970'j . Several asbestos free types of e a te ria l available c o m c rc itlly Sound In s u la tio n m aterial e lim in a te d on c u rre n t sh ip m e n ts. Can be removed and l e f t o ff e x is tin g m etal laggings. I f sound deadening is s t i l t re q u ire d , non-asbestos. nen-jprayed-on m aterial 1s a v a ila b le . A sbestos-free replacem ent gaskets av ailab le. ASBESTOS CONTAINING MATERIAL TYPE POTENTIAL LOCATIONS GENERAL SPECIFIC ; COttfHTS GASKETS - Spiral Hound (coni'd) Main Sttfan Valve Asseiebl 11 (Main Stop, Control, Reheat and In tercep t Valves) Hon Ratum Valves Valve Iteada -Solted-In la itj Bolted In le t flanges Bolted outlet flanges -CV Jtand Bolted s tw hushing guides -U akoff flanges -Toke to casing CY head Equalizer velv* flanges SV bypass seat Auxiliary S t* Valves (E q u a lliar, Blottdodn, V en tilato r, Bypass, CY S te ttin ? , Speed Matching, C ross' over Adrissfon Extraction, Steaa Seal Regulator) Valve heads -io ited -ln seats Bolted in let flanges Bolted outlet flanges Bolted Stm bushing guides -U akoff flanges -Toke/stend to casing Moisture S eparator (MS) HS/K5R M ways and Hol stur -MS/HSR drain tank eamays Separator Refteittrs(K5R) leak detection o rifice flanges Heat Exchangers (Stew Packln? Exhauster, S tew Seal Evaporator) -SPE shell drain -SSE drain tank In la t -SSE drain tank pipe connections Secondary S tew Pipi ng and Valves (S te w S eal, External Drain, Heating l Cooling Steaa. flyoasj Flanged piping connection -Valve in le t flanges Valve o u tle t flanges Valve bonnet to body R elief valve te s t lever Asbestos-free replaeewnt gaskets available. GE P0W 002471 * I GENERAL rE CT H 1C XJ Turbin MiHcgtin^ and Projects Operation Customer Servie Departmtnt Tadtuiai WermtiM l*t*r He. 1052-4 ASBESTOS CONTAINING MATERIAL TTP GASKETS F lat Sheet (*ar `Woven C lo th ) POTENTIAL LOCATIONS GENERAL IP Casings SPECIFIC Inner c a s in g access* -E x h au st hood u n w ay s - l a s t stage o r if ic e assem bly -B earing cap access openings -E xhaust flange -S ig h t flow opening P icking U sin g s -B olting fla n g n -Pip* flanges Yalve C iu st -V alve ch e st c o \tr H eat Exchangers {Steam P ic k in g E x h e u jttr s , Steam Seal E vaporators, Oil C o o lers, EKC C o o le r s , S t a t o r B ag-C oolers, A ir C o o lers, Hydrogen C oolers) -S hell to tubesheet -S hell o u tle t flange -H eader to cover -Manway* c o v e r W aterheader to cover -N aterheadar to tubesheet -W aterbox to cover S h ell flange to seel rin g S eal rin g to w aterbox H ydraulic A pplications {H ydraulic M echanism s (MKC) a t F r o n t S tan d ard , H ydraulic E nclosures, S eparate H ydr. C ylinder A ssem blies, L ube 011 T a n k , L i f t Pump A s s e m b lie s , F ro n tM d S tandards, T urning G ear H ousings, T h ru st B earing H ear d e te c to r. O il C onditioners, F ilters} -H y d rau lic mechanisms bolted Jo in ts - H ousing access covers Lube and h y d ra u lic p ip e rla n g e j O il pumps m ounting fla n g e s - B o o s t e r pump c o v e r Lube o il tra n s fe r vlve mounting flan g e Gage mountings -Sw itchbox cover iA ir A p p l i c a t i o n s -A ir cylinder -A ir valves -A ir f i lt e r reg u lato rs G enerator -Access covers C0WENT5 Woven c l o t h g a s k e t s c m be replaced w ith nonasbestos n itc r f e ls or su ita b le non-esbestos s p i r e ! wound g a s k e t s . Non-asbestos f l a t sheet g x sk o t mat i r i a l s a v a ila b le . - `4 T J cm) ASiCSTCS - POTENTIAL LOCATIONS cohtaikiks MATERIAL TYPE 1 GENERAL SPECIFIC STEM PACXIMS V air* Stem s -N uclear aid s te m valves -Secondary s te m systems v a lv e s ^Special fo s sil aIn ste m valves COWEHTS H on-asbestos n o ta ria l av ailab le. SHAFT SEAL MHC H y d r a u lic C y lin d e rs f o r Main S te m Y alves Lube OH S y ste a , m m seal Valve M otor O perators Hon R e tu rn V alves B u tte rfly Valves ELECTRICAL M otors Therm ocouples H e a te rs ( Gene n to r ) G enerator E le c tric a l In s u la tio n System s (Haven a t e H a h , papers, re sin fib er com binations, pu tty ) : . rw -fters -Rod se a l fo r exposed c y lin d e rs -Vapor e x tra c to r -B u tte rfly valve -T ran sfer valve bearing se a l (A ndals only) -Shaft seals at several locations -Shaft seals -In tern al seal m a te ria l on d is c DC m o to r I n s u l a t i o n E x ten sio n w ire In su la tio n -Wire I n s u la ti o n S tato r b ar an w r tip s Tape on d u cts o f gas Cooled a m a tu re bars - V e r t ic a l s e p a r a to r s 1n arm ature bars -R otor s lo t In su latio n -R otor s l o t armor v o ltag e g ra d in g -R otor blocking R otor end tu rn s tape -Packing under s e rie s loop Insu latio n R etaining ring In su latio n -S tato r bar strand In su latio n -A p o le r o t o r 1r H on-asbestos o a ta r la ls a v a il a b le free v en d o rs. 'r C o n ta c t vendor f o r s u b - stttu d o n s A sbestos elim in ated tn 1980, A sbestos e Iftsl n ate d about 1970, ' ( H on-asbestos <t a r la is f o r a l l type? o f generator e le c tric a l In s u la tio n system s a v a ila b le since 1983, GB PO W 002473 - - l A sbestos rlie fn a te d j - -.a. A 4 !