Document jg8mk6pM404RZ988Oy5xb33vN

FILE NAME: Westinghouse (WH) DATE: 1960 Jan 11 DOC#: WH019 DOCUMENT DESCRIPTION: Process Specification - Application of Asbestos Compound by Spraying ciJuCO- PR0CE33 SPECIFICATION APPLICATION O? ASBESTOS COMPOUND BY SPRAYINO 6O-OI-II CKANGCO i Qeneral Thl3 specification covers the application of sprayed insulation on the inside surfaces of steam turbine laggings for the purpose of insulation and sound deadening. ' Ma ter ia 1 The material used for this process is as listed below:- W.E. Material 4057-3. Equipment The equipment to be used Is as listed below or its equlvalent:- Eclipse Air Bruch Co. "46" Spray Qun with Cone Nozzle and 1/4" fluid tip Eclipse #7835 Pump, 4 to 1 ratio suitable hoses for carrying 60 psl atomizing pressure and 60 psi fluid pressure. Operations II) Cleaning lagging 2) Application of Primer Coat 3 j Application of Anchor Coating I4t) is ArpepcloimcmaetnidoendofthSaetcotnhde aCbooavteingoperations be performed to t5he) laAgpgpilnigcawthiiolneofiPnintahle Caosasteimnbgled condition. (1) Cleaning Lagging Remove all dirt, oil, grease, rust and other foreign matter from the metal surfaces to be coated. This operation to be accomplished by using mineral spirits or 630 5-1 , followed by wiping with a clean cloth. Cautlont Ventilation must be provided to avoid accumulation of vapor..Refer to Safe Practice Data Sheet T-W. (2) Application of Primer Coat Apply one (1) coat of primer 6449 will be sprayed with insulation #4057-3 to all surfaces that - y rtf si' / - C t 600021 WESTINGHOUSE E LE C T R IC CORPORATION PHLA. PA. U.SA. CTr a h - k60_0e111 bO-Ol-11 r (3) Application of Anchor Coat Apply one coat of the comccunu by spraying to cover =5p r o x i mate ly 8o of the curfoce, l.c., 20-d of the ba3e metal will dhow through the inculcting compound. The compound is applied by holding the spray gun approximately tlxrce feet from the logging. The surface will appear mottled. minimum of one (1) hour. Air dry this casting for a Note;- The anchor coat should always be Insulated with compound from a barrel that has not been previously opened. A previously opened and resealed drum nay be used for later coats. (1}) Application of Second Coat Spray on a heavy coating to a wet film thickness of 3/ 16 of an Inch. This Is to be applied by spraying with sufficient number of passes to build up to 3/1& of an inch and prevent any running or sagging of the compound. Before the applied insulation has time to set up, separate the ^ i n t s where the turbine lagging is to be disassembled using a parting tool. Air dry this coat for a minimum of two (2) hours. (5) Application of Final Coat Spray on a final coat to increase the final film thickness to l/4 of an inch minimum. Separate the joints with the use of a parting tool before the insulation has time to set up. for a minimum of 24 hours. Air dry Caution The operator should wear an air-supply type respirator. Keep flames and sparks away from the insulation material. Refer to Safe Practice Data Sheet E-l. ' The material is supplied In 30 gallon drums with clamped sealed tops. Always keep material sealed when not in use. Order insulating compound for coverage of 4.3 square feet per gallon. 4 600111 Page 2 of 2 J. W. Desmond, Mfg. Engineer L.&M.T. Erection and Test \ 600022 WESTINGHOUSE. ELECTR IC CORPORATION PHiLA. PA. U.S.A. e T f Al J