Document NNq9Gzo3gbo3geM7LaZ2MzYOw

CC; Minneapolis EUFS - 0. Sowners CC: Orlando MC250 3TSD - C. U. Mack WMnghouse Bectric Corporation June 25, 1987 3501 SoMfmny 100 Mmnooous Mmesots 55418 612 927 2323 CUSTOMER ADVISORY LETTER 87-02 ,J. Petersons Northern States Power Company A.<v5<)K1ng Statlpn OaiowluHelg St11T*&r.. H [82 Subject: - Gaskets for Steam Xnstallati gaskets in results in fore leeks at gasket performance. istos gaskets ^urbine gen increas id de as for asbestos 'cations has resulting from on ^f unit operating While the literatur that certain materia gaskets in a steam turi experience fails to dam adequate substitutes* stos gaskets may imply titutes for asbestos ironment, our service that the materials are over the past severe non-asbestos gaske " Our experience in not reliable vh excess of 200 has evaluated rating environments. asbestos gaskets are ironaent is in Westinghousf inued the for steam ication in env greater* 'ently using asbesto high tartweture steam turbine applicat suitah4S55Itarnative-material can be qua opergtSng safety and reliability demonstraf estos gaskets 200r or for certain until such time as d and it's A^Jfchis time neither the Environmental Protection Agency nor the Occupational Safety & Health Agency prohibit t^raase of asbestos gasket materials provided the safety procedures<gjpcified in 29 CPR Part 1910 ("Occupational Exposure to Asbestos*) and 29 CFR Part 1910*1200 ("Hazard Communication Standard") are adhered to. MCUUMSS OF UA8SJTY asbestos gaskata ara racosaaandad for ataaa turbina applical vhara tha taaparatura of tha oparating anvironaant is in ' 200J\ if you ara using non-asbastos gaskats in thasa applications, rsplacaaant with asbastos gaskats is racoi jgKdad at tha naxt availabla opportunity, Whan a suitabla rmpXtk Sant for asbastos gaskats has baan qualifiad, you vill ba adv! If hava an; quastions ragarding tha applieab youi^applicat s or if furthar clarification 1 do natsSSwsitT' to contact as. ksts for irad, plaasa A copy this for our f ga racaipt of copy to us Sincaraly, Richard X. Johnso Tachnical Sarvica Minneapolis E.S.S RXJslr 00000067