Flange Protection System
FLANGE PROTECTION
STEP 01: SURFACE PREPARATION
- Minimum surface preparation should be SSPC-SP2 (Hand Tool Clean).
- Once loose materials are removed, clean surface with denatured alcohol or acetone to remove any remaining dust, grease and moisture.
- Surface of the substrate should be 5°F+ above the dew point.
- Keep the working area clean and dry. Avoid the presence of water.
STEP 02: VISCOSEALANT APPLICATION
- VISCOSEALANT is to be applied into the void between the flange faces. Protect flange neck with a removable tape in order not to pollute the neck with the VISCOSEALANT.
- For optimum application of VISCOSEALANT, preheat material to 35°C/90°F.
- Inject the VISCOSEALANT into the space between the flange faces around the complete circumference of the flange.
- Dependable upon the flange class and type, a flexible nozzle can be used to better penetrate the flange aperture.
STEP 03: EZ WRAP APPLICATION
- Remove the protective tape on the neck and apply one layer of EZ WRAP over the complete circumference of the flange.
- Overlap EZ Wrap at least 5 cm/2’’. A roller may be used to ensure adhesion.
- In case the flange neck does not match the width of the EZ WRAP, apply separate wraps in such a way that the circumference overlap between the two wraps is always a minimum 1”. Termination of wraps to be staggered. Install cap on nut and bolt.
VISCOTAQ PROTECTION FOR BURIED FLANGES
STEP 01: SURFACE PREPARATION
- Minimum surface preparation should be SSPC-SP2 (Hand Tool Clean).
- Once loose materials are removed, clean surface with denatured alcohol or acetone to remove any remaining dust, grease and moisture.
- Surface of the substrate should be 5°F+ above the dew point.
- Keep the working area clean and dry. Avoid the presence of water.
STEP 02: VISCOSEALANT/VISCOPASTE APPLICATION
- Viscosealant is to be applied into the gap between the flange faces using injector tool.
- For optimum application of Viscopaste, the material should have a temperature 25°C/77°F. Use putty knife knead the Viscopaste at a 45° angle from the flange rim toward the pipeline. All bolts and nuts should be covered with Viscopaste.
STEP 03: VISCOWRAP APPLICATION
- Apply Viscotaq® Viscowrap into the direction of the factory coating and end straight with an overlap of minimum 100cm/4” onto the factory coating.
- Continue the application of wrap with 1cm overlap between the layers. Lay the Viscotaq® Viscowrap around the main pipe and smooth the fabric on to the surface of flange.
STEP 05:OUTERWRAP APPLICATION
- Start with a circumferential wrap. Apply the Outer Wrap criss-cross around the flannged connection until all Viscowrap is covered.
- Finish the flange with Outer Wrap on straight sections.
- Apply with 50% overlap, with tension and without any air inclusions. Leave 1/4’’ section of Viscotaq® Viscowrap outside on both ends.