Document 40mRrK3oLwa72d8ZzxgNdzVN

CO#MCPONOCHCC R PLAINTIFF'S I . EXHIBIT Westinghousc !I WH-869 '"om Lester Plant - Steam Division OATC January 5, 1962 suajCCT Insulating Block "R-14" Large Turbine Erection & Test ^Mr. J. 1. Jones The following Is a list of suppliers and trade names of materials 7308 and 7309-1. Material Supplier Trade Name 7308 Baldwin-Ehret-HIII Johns-Manvilie Owens-Coming Philip Carey Ruberoid Thermasil Thermobestos Kaylo Carey-Temp. Calsillte M *v' l 7309-1 Johns-Manvilie Keasbey & Mattison Owens-Coming Philip Carey Baldwln-Ehret-Hill -> Superex-M K & M Hy-Temp. Kaylo - 20 Carey Hi-Temp.. 19 Enduro Hi-Temp. * The main difference between these two materials'Is that the 7308 is a better insulator than 7309-1, but does not have as .high a temperature limit (1200 vs 1600). Since we have present application for 7309-1 (gas turbine combustors operate at over 1200) and eventually steam* turbines will go over 1200; we can't depend on using 7308 exclusively. Also-, Since we use two layer Insulation for anything over 600, we use the 7309-1 to take the initial heat shock and the 7308 (because It's a better insulator) on the outer layer. I am also attaching the latest standard book pages on insulation, which you might find useful. Steam Division df Attachment - Standards Engrg. Processes M. Dorfman 600096