Document QXVz7dgk7LRVEgwyYXDZ2EKRL

u '?//, BVKOONPIttN Cl CHANGED xhUr 2 3 4 >- -a-'" L( o = r1 1 ! `-5 OJ - -a is ? I i t i \ | i c' i 5 'V : t *; > { i if.i.l C 1 ss: i . 2 ' - Ui 'o (9 *m %mJ P li. Ill z w (A \a ec o %k. .* tel o hi 5 QC A. CL < tel O ft; 3 REF. PROCESS SPECIFICATION APPLICATIOl. r SPRAYED ASBESTOS INS .ATION 00916 PAGE1OF2 GENERAL .' THIS PROCESS COVERS THE INSULATION OF STEAM TURBINES WITH A SPECIALLY BLENDED ASBESTOS OR ASBESTOS-MINERAL FIBER COMBINED WITH AN INORGANIC BINDER WHICH IS SPRAYED ON TO THE DESIRED THICK NESS BY MEANS OF A SPRAYING MACHINE. ' CAUTION: 00 NOT USE THIS MATERIAL ON AUSTENITIC PIPING. THE INSULATION THICKNESS AND THE TEMPERATURE OF THE METAL ON WHICH THE INSULATION WILL BE APPLIED WILL BE SHOWN ON THE INSULATION DRAWING. . MATERIALS AND MATERIAL SAFETY REQUIREMENTS ALL MATERIALS USED IN THIS PROCESS ARE TO BE SUPPUEO BY THE INSULATION CONTRACTOR. . THE MATERIALS AND THEIR RESPECTIVE SAFE PRACTICE DATA SHEETS ARE AS FOLLOWS- . MATERIAL 542S1AQ SPRAYED INSULATION 55B12CB MINERAL SPIRITS - 46110BA CEMENT 41511AP - 12 OZ. ASBESTOS CLOTH 533S10U ADHESIVE 20 GAUGE POULTRY NETTING ELECTRIC PRESSURE WELDED STUDS 10144AB EXPANDED METAL 42331AA ASBESTOS PAPER 10730DX STAINLESS STEEL WIRE, 1/16 DIA. SPPS A-20 S-6 A-20 A-20 ------W-l ---- A-20 ------- ; EQUIPMENT ` . SPRAY MACHINE (UNIVERSAL INSULATING MACHINE OR EOUAUINCL. 6 OR 9 JET SPRAY GUN. .- . COMPRESSOR OF NO COMPRESSED AIR IS AVAILABLE)WHICH CAN SUPPLY AT LEAST S.5 CUBIC FEET OF AIR PER MINUTE SUCH AS BINKS MODEL 33-1126. . ASSOCIATED AIR, WATER AND FIBER HOSES. SET OF PRESSING AND TROWELING TOOLS FOR TAMPING AND FINISHING. .. - EYE BOLT STUDS, STYLE 270A09lH01, SHALL BE WELDED TO THE INSULATING PADS ONLY WHERE REQUIRED TO ANCHOR INSULA TION, USING A NELSON OR EQUAL $JUD WELDING GUN. 1 IF ANY OTHER ANCHOR PINS OR aVtaCHMENTS ARE REQUIRED, THEY MUST BE WELDED ONLY TO THE INFLATION PADS. ON CARBON STEEL CASTINGS ORVoRGINGS 6HLY, EYE |OLT STUDS OR OTHER ANCHOR PINS MAY BE WELDED DIRECTLY TO THE CASTING OR FORGING BY USING A NELSOt) OR EQUAL STUD WELDING GUN. ' THESE STUDS OR PINS ARE TO ANCHOR THE POULTRY NETTING $ND SHOULD BE OF SUCH LENGTH AS TO BE A MINIMUM OF 1/2 INCH UNDER THE SURFACE OF THE FINISHED INSULATIONS REFER TO PROCESS SPECIFICATION 600465 FOR ELECTRIC PRESSURE STUD WELDING. 3. APPLICATION OF SPRAYED INSULATION *! -- NUTS SHALL FIRST BE WRAPPED WITH ASBESTOS PAPER OR CLtflH. INSULATION MATERIAL 54251AQ SHALL BE SPRAYED WITH THE ipRAY- INC MACHINE TO AN APPROXIMATE DRY DENSITY OF 12 LBS. PER CU. FT. THE INSULATION SHALL BE BUILT UP^O THE REQUIRED THICKNESS IN A MINIMUM OF TWO LAYERS. INOTE THAT THICKNESS WILL .BE REpUCED BY ABOUT 1/2 INCH BY PRESSING. T^E ELAPSED TIME BETWEEN THE . APPLICATION OF THE LAYERS SHOI&O BEHELD TO A MINIMUM. IFTWO OR THREE HOURS ELAPSE BETWEE#`LAYERS, THE PREVIOUS LAYER MUST BE SPRAYED WITH WATER TO INSURE A GOOD BOND. * SPRAY iNSULATION TO WITHIN 1/2 INCH OF FINAL THICKNESS, i APPLY 20 GAUGE POULTRY NETTING OVER THE SPRAYEO INSULATOR ANO ANCHOR IN PLACE BY FASTENING NETTING TO ANCHOR PINS. FINISH SPRAYING INSULATION TO REQUIRED THICKNESS. 4. FINISH OF SPRAYEO INSULATION .. THE FINISHED SURFACE MUST BE PRESSED TO UNK THE FIBERS IN ORDER TO FORM A MONOLITHIC COATING ANO ASSURE A GOOD CONTACT WITH THE SUB-SURFACE. SINCE THIS PRESSINGWlLL REDUCE THE . THICKNESS OF INSULATION, THE AMOUNT THAT IS SPRAYEO SHOULD BE GREATER THAN THE FINISHED THICKNESS BY ABOUT 1/2 INCH TO TAXE INTO ACCOUNT THE REDUCTIONS THICKNESS WITH PRESSING. THE PRESSING SHOULD SMOOTH OUTjTHE SURFACE, BUT WILL MOTCORRECT FOR A POORLY SPRAYED SURFACE. > | SAFETY PRECAUTIONS FOR MACHINE OPERATION THE FOLLOWING PRECAUTIONS MUST BE TAKEN BEFORE AND DURING OPERATION OF THE SPRAY MACHINE. . '' . 1. MACHINE MUST BE PROPERLY GROUNDED. ' 2. STOP MACHINE BEFORE MAKING ADJUSTMENTS. 3. KEEP HOSES FREE FROM KINKS OR BENDS. 4. 00 NOT POINT- GUN AT ANYONE WHEN MACHINE IS RUNNING. 5. PERSONNEL IN IMMEDIATE AREA OF MACHINE MUST WEAR MASKS. 6. 00 NOT REMOVE FIBER FROM FEED HOPPER WHILE MACHINE IS RUNNING. 7. KEEP BELT GUARDS ON WHEN MACHINE IS RUNNING. ' - THIS PROCESS WILL BE DIVIDED INTO TWO PARTS:- PART I - APPLICATION OF SPRAYED INSULATION WITH INTEGRAL FLANGE COVERING. PART II - APPLICATION OF SPRAYED INSULATION WITH REMOVABLE FLANGE COVERING. 5. APPLICATION OF FINISH COAT* V' . ..L: -. A THIN COAT OF INSULATION FINISHING CEMENT MATERIAL 46110BA SHALL BE APPLIED OVER THE SPRAYEO INSULATION TO GIVE A SMOOTH SURFACE. THE THICKNESS OF THE CEMENT WILL VARY DUE TO THE ROUGHNESS OF THE SPRAYEO INSULATION, BUT IN NO CASE SHALL THE CEMENT COATING BE LESS THAW1/4 INCH THICK. . OVER THIS, PASTE. A COVERING 0P12 OZ. PER SQUARE YARD MATERIAL 41511AP USING ADHESIVE MATERIAL 53351DU. A FINAL COAT OF PASTE SHALL BE APPLIEO OVER THE ASBESTOS CLOTH. * PART II APPLICATION OF SPRAYED INSULATION WITH REMOVABLE 1 ----- --. FLANGE COVERING. o . ~ INSULATION IS TO BE APPLIED TO THE TURBINE IN THE SAME MANNER' AS OESCRIBEO IN PART I, WITH THE FOLLOWING AOOtTIONSr 1 1. THE INSULATION OF THE TURBINE CYLINDER IS STOPPED ANO 1 SQUARED OFF A SUFFICIENT DISTANCE FROM THE TURBINE JOINTS TO ALLON CLEARANCE FOR THE REMOVAL OF BOLTS. ' PART I - APPLICATION OF SPRAYED INSULATION WITH INTEGRAL FLANGE COVERING ! ;! . OPERATIONS 1. PREPARATION OF SURFACE. 2. ATTACHING ANCHOR POINTS. 3. APPLICATION OF SPRAYED INSULATION.. . . . 4. FINISHING OF SPRAYED INSULATION. S. APPLICATION OF FINISH COAT. - - 1. PREPARATION OF SURFACE .' SURFACES TO BE SPRAYEO SHALL BE THOROUGHLY CLEANED TO REMOVE ALL OUST, DIRT, CREASE, RUST AND LOOSE PAINT. THE INSULATION WILL BOND TO ANY SURFACE, PAINTED OR UNPAINTEO, AS LONG AS IT IS FIRM ANO CLEAN. 2. ATTACHING ANCHOR POINTS 2. EXPANDED METAL HOLDERS, EACH ABOUT TWO FEET LONG, SHAll BE FORMED AS SHOWN IN FIG. 1, OF MATERIAL 10144AB. .070 THICK, AND WIREO IN PLACE TO SUPPORT THE INSULATION OVER ' FLANGE AREAS ANO BOLTS AND TO ALLOW FOR EASY REMOVAL; ASBESTOS PAPER MATERIAL 42331AA SHALL BE APPLIEO AT tHE CYLINDER JOINTS, ABOVE THE EXPANDED METAL HOLDER ABJlXCENT TO THE CYLINDER CURVATURE/AND BETWEEN THE TWO FOOT- SECT10NS ALONG THE FLANGE TO CREATE A SEAM OR PARTiJm?. SPRAY INSULATION SHALL THEN BE APPLIEO TO PROPER THICKNESS, ! ANCHORED WITH POULTRY NETTING, SPRAYEO AND PRESSED, FINISH . COATED WITH CEMENT 46110BA AND COVERED WITH ASBESTOS CLOTH 41511AP PASTED ON WITH ADHESIVE 533510U AS DESCRIBED IN PART I. NOTEr- THIS FINISH IS NOT REOUIRED ON THE TURBINE CYLINDER WHEN TURBINE IS COVERED WITH AN ENCLOSURE. ^ ON ALLOY STEEL CASTINGS OR FORGINGS, AT POSITIONS SHOWN ON CYLINDERS (AND OTHER) INSULATION PAD* ORAWINGS, INSULA TION PADS TO STYLE 70A089H01 WILL BE WELDED IN PLACE. CAUTION: NO FURTHER WELDING OF ANY ANCHOR POINTS DIRECTLY TO ALLOY STEEL CASTINGS OR FORGINGS IS PERMITTED. 40022632 WESTINGHOUSE ELECTRIC CORPORATION, LESTER, PA., U.S.A. CTTAM ^w\ =. " ------------ '600916 P6r-c i rvr ^ 00916 PAGE 20F2 APPLICATION OF SPRAYED ASBESTOS INSULATION [BYILDQRfMAN SPRAY INSULATION 54251AQ ASBESTOS PAPER . 20 GAUGE POULTRY NETTING S.S. WIRE 0730DX i CHANGED 2 In}l7 3 4 FINISH CEMENT 46110BA 12 OZ. ASBESTOS CLOTH 41511AP ASBESTOS PARTING PAPER 1/8 THK. 42181AA APPUED AT TIME BASE INSULATION IS APPUEO. FIGURE 1 600916 PAGE 2 2 WESTINGHOUSE ELECTRIC CORPORATION, LESTER, PA., U.SA STEAM DIVISIONS '==== () STANDARDS ENGRG. REF. Produced 3/93 40022633