Corrosion Control Inside a Casing System

VISCOTAQ® CASING END SEAL APPLICATION PROCEDURE

The VISCOTAQ® Casing End Seal System is based upon the use of ViscoPaste in combination with Viscotaq ViscoWrap and a Viscotaq Composite Wrap(C-Wrap). VISCOTAQ® is a viscous elastic synthetic material that remains flexible and tacky during its entire life. The VISCOTAQ® Casing End Seal System is used to prevent water infiltration and corrosion where the carrier pipe enters the casing.  The VISCOTAQ® Casing End Seal System can be installed on new and existing casings.

1) Surface preparationClean surface to a Minimum SP2 and preferable power brush cleaning. Degrease the surface and remove all loose sand, dust and dirt; this process can be done by using a solvent such as industrial alcohol.

Clean SP2, remove loose parts/coating 

Surface of casing and carrier pipe

2) Application VISCOTAQ® ViscoPaste
Apply ViscoPaste a minimum of 1½”- 2” inside of casing between the casing and carrier pipe; taper ViscoPaste at a 30 degree angle from the casing pipe to the carrier pipe.    ViscoPaste should be packed into the casing void with as few air pockets as possible. 

Apply 1 ½ inch deep

 Angle at 30 degree

 Finish smooth

    
3) Application VISCOTAQ® ViscoWrap

Apply the VISCOTAQ® ViscoWrap over entire casing end seal area by starting 8 inches from the casing end.  Wrap VISCOTAQ® ViscoWrap with a 50% overlap from casing pipe to carrier pipe, wrapping at an angle with slight tension to create a smooth overlap. Ensure no air pockets are formed during wrapping. (see: VISCOTAQ® ViscoWrap Instruction Manual). During transition to the carrier pipe, ensure the last full wrap during transition overlaps the casing by1 inch min. Follow through with wrapping 10% overlap and continue 8 inches on the carrier pipe.
   
Ensure for a smooth transition and cover 8 inches

on carrier and casing

4) Application Viscotaq Composite Wrap
Preparation of Composite wrap:
a) wear plastic gloves during application.
b) have a spray bottle and sufficient water available
c) open & remove from aluminum pouch and plastic bag just before application

Remove aluminum pouch

Remove plastic pouch, wear gloves  

  

1. Wrap the composite wrap with 50% overlap, apply water with the spray bottle during wrapping and apply sufficient tension.
2. Apply Viscotaq composite wrap over the entire transitin area from carrier pipe to casing pipe for mechanical protection.
3. Start 10 inches from the end of the casing and end 10 inches onto the carrier pipe. Wrap two layers of Composite wrap during the process with 50% overlap.
4. Ensure the angled transition between casing end and carrier is completely covered with composite wrap.
5. After wrap has been applied lightly spray the complete application area with water.
6. Wrap entire area where C-Wrap has been applied with shrink wrap; wrap to ensure a smooth application.
7. Gently poke holes in plastic wrap for ventilation.  Holes should be every few inches around the circumference of the pipe.
8. Remove plastic wrap when C-Wrap has cured.   Average curing time 1-3 hours.
9. C-Wrap can be painted if desired.
10. System can be pressure tested at 5 psi.

Apply the Composite wrap with sufficient tension  

Start on casing 10 inches from end, 50% overlap 

Ensure Composite wrap covers 100%    

For more information about this product contact your local B&W Sales Representative or contact B&W Distributors, Inc. directly at 480-924-8883.