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POROSITY SEALING FORM-IN-PLACE GASKETING EXISTING WELD POROSITIES AND CASTINGS SEALING CAST RIGID FLANGES Continuous Bead Loctite® 290TM Weld Bead Tank Wall Weld Porosity Circle Bolt Holes 1. IMPORTANT! TAKE PROPER SAFETY PRECAUTIONS IF WORKING WITH Flat Flange Raised Flange FLAMMABLE LIQUID TANKS. AVOID USE WITH COMPRESSIBLE GASSES. 2. Wire brush to remove paint, rust, etc. from repair area. 1. Remove old gasketing material and other heavy contaminants with Loctite® Chisel® Gasket Remover. Use mechanical removal technique if required. 3. Clean repair area with Loctite® ODC-Free Cleaner & Degreaser. Note: Avoid grinding. 4. Apply localized heat to bring repair area to approximately 250°F. 2. Clean both flanges with Loctite® ODC-Free Cleaner & Degreaser. 5. Allow repair area to cool to approximately 185°F. 3. Spray Loctite® 7649TM Primer NTM on only one surface. Allow 1-2 minutes 6. Brush or spray sealant on repair area. to dry. Note: · Steel Use Loctite® 290TM Threadlocker at 185°F. 4. Apply a continuous bead of Loctite® Gasket Eliminator® Flange Sealant · Aluminum/Stainless Steel Use Loctite® 290TM Threadlocker to the other surface. at 120°F. Note: Circle all bolt holes with sealant, if appropriate. Note: · Not recommended for "blowholes". 5. Mate Parts. Assemble and tighten as required. · Maximum porosity sealed .005". Note: Immediate assembly not required; however avoid delays 7. Allow to cure for 30 minutes (High Pressure, above 150 psi -- 1 hour). over 45 minutes. 8. Clean with Loctite® ODC-Free Cleaner & Degreaser to remove excess 6. Allow to cure: sealant. Do not grind. a. No pressure immediate service 9. Paint as required. b. Low pressure (up to 500 psi) 30 to 45 minutes c. High pressure (500 to 2500 psi) 4 hours Note: Casting repair uses same procedure. d. Extreme high pressure (2500 to 5000 psi) 24 hours SEALING NEW WELDS -- PREVENTATIVE MAINTENANCE ® LOCTITE BRAND GASKETING QUICK SELECTOR 1. Remove all slag and scale while hot. Use Product Gap Fill Temp. Range 2. Apply sealant when weld is 185°F and falling. TM ® General 518 Gasket Eliminator .050" -65°F to 300°F 3. Follow information above. General 515TM Gasket Eliminator® .050" -65°F to 300°F High Temperature 510TM Gasket Eliminator® .020" -65°F to 400°F General/Overhead QuickStixTM 548TM Gasket Eliminator®.010" -65°F to 300°F 12 13