How To Seal a Flange

How Do I Seal A Flange?

An Installed FlangeSeal

     Raychem / Covalence's (same company) is designed to prevent corrosion of flanges and mechanical couplers.  The Flange Seal system consists of a precoated, heat shrinkable fiberglass reinforced wraparound sleeve that provides a smooth transition from flange to pipe surface.
     Flangeseal products are available in a variety of sizes that accomodate 4" to 62" (or larger) flanges and a wide range of pipe diameters.  After wrapping the sleeve around the pipe and flange, it is easily closed with the preattached zipper and then the sleeve is torch shrunk in place.  The Flangeseal system provides a moisture seal that resists heat, cold, vibration, impact, abrasion and corrosive gases and fluids.
     It is important when calling for pricing that you know both the actual OD of the Flange and the actual OD of the pipe.  With those two bits of information we can have price and delivery information for you in seconds.
   

The products features and benefits of Flangeseal (sometimes images don't show up well on phones):

• Heat shrink backing with integrated fiberglass reinforcement that is tough and long lasting.  FS backing provides a high recovery capacity.
• 65% shrink ratio conforms to high transitions; reduces inventory and logistics costs and ultimately saves money.
• High mechanical resistance backing resists abrasion, impact and penetration.
• No primer is required.  There is also no cure time. 
• Specially formulated sealant ensures a strong bond and a tight seal to virtually any substrate.  Flange seal maintains its elasticity and sealing characteristics over a wide temperature range.
• Sealing adhesive automatically flows and repairs minor mechanical damage if there is any.  Flangeseal is self healing which saves money on repairs and CP systems.
• Low preheat sensitivity and proven functionality leads to faster application, saving labor costs and time.
• Zipper closure system if simple and fast.
• No special equipment is needed.

Examples of a few of the sizing options.

     With its 65% shrink ratio, Flangeseal is able to cover nearly any Flange OD / Pipe OD transition.  Please have Flange OD and Pipe OD handy before contacting us for a quote at 936/321-3333.

FLANGESEAL Heat Shrinkable Corrosion Protection Sleeve

 

FLANGESEAL

 Heat shrinkable corrosion protection sleeve specifically developed for installation on flanges or mechanical couplings that are already in place.

Product Description: FCWS-F/Flangeseal (US) flange/pipe sealing and protection.

• Construction: Two-layer system
• First layer: Visco-elastic sealant.
• Second layer: Fiberglass reinforced, radiation cross-linked, polyethylene backing.

The FCWS-F/Flangeseal (US) - is a wrap-around heat-shrinkable sleeve, with a specially designed zipper closing system, allowing a fast and simple installation. The fiberglass-reinforce woven backing gives the FCWS-F/Flangeseal (US) a high mechanical resistance as well as a high recovery capacity. In addition to the sleeve, a cardboard sheet is supplied to keep the flange nuts & bolts clean, allowing easy re-entry and disassembly when necessary.

FCWS-F/Flangeseal (US) is installed using standard gas torches. The installation is carried out directly on the cleaned and prepared pipe surface and flange. After preheating, the corrugated cardboard sheet is wrapped around the flange to be sealed. The heat-shrinkable sleeve is positioned centrally over the flange
and closed, using the zipper closure. When heated above 125°C (257°F), the sleeve shrinks tightly around the substrate. During recovery, the adhesive softens and flows to form a tight bond. The bond strength builds up during cool down and is fully retained after completion of the job.

Product Features/Benefits:

• Backing with integrated fiberglass reinforcement making it tough and long lasting. Provides a high recovery capacity.
• 65% shrinkage ratio – conforms to high transitions. Reduces inventory & logistics costs allowing to save money.
• High mechanical resistance backing resists abrasion, impact and penetration.
• No primer required, no drying time and easy application.
• Specially formulated sealant ensures a strong bond & tight seal to virtually any substrate. Maintains its elasticity and sealing characteristics over a wide temperature range.
• Sealing adhesive automatically flows and repairs minor mechanical damages "Self-healing effect."saves money.
• Low preheat sensitivity & proven functionality for faster application, this saving time.
• Zipper closure system for simple & fast installation.
• No special equipment required makes installation fast, easy and keeps installation costs low.

Product Selection Guide:

Max operating temperature:   30°C (86°F)
Compatible line coatings:   PE, PP, FBE, Tape, Coal tar, Asphalt, Plastics
Min preheat temperature:   60°C (140°F)
Recommended pipe preparation:   ST3

FCWS-F/Flangeseal (US) type products are available as a kit containing:
- a sleeve (pre-cut sleeve with zipper closure)
- a corrugated cardboard sheet