This is a picture of a section of 14” brine pipeline. The line was approximately 10 years old at the time of removal. It had an internal and external fusion bonded epoxy coating. Both the internal and external coatings were in excellent condition and could have remained in service for many years. The resulting corrosive effect of the transfer material caused universal damage to the entire girth weld area. The most extensive damage occurred in the 6 o’clock position where the corrosion and erosion took place. Not protecting the weld area reduced the pipeline’s service life by approximately 75% of OD pipe’s expectancy.An Introduction to the CCB® Sleeve
The CCB® Sleeve is designed to isolate the portion of internally coated pipe that is destroyed by the heat from the welding process. It returns the internal lining to a homogenous state protecting the steel from the corrosion that occurs when the girth weld area is left unprotected by the loss of the I.D. coating.
The CCB® Sleeve has two sets of o-rings affixed into grooves machined around the outer circumference of the ends. The o-rings are manufactured with compounds specifically designed to resist the process flow being transported in the pipeline. The center portion of the outer circumference of the CCB® Sleeve has a machined recesswhere a backing ring with break-off weld spacing nubs are attached. The heat resistant material folds around the interior radius of the steel backing ring to completely isolate the backing ring from the sleeve and provides heat protection during the welding process. The steel backing ring acts as a welding guide and is blended into the weld becoming a permanent anchor for the CCB® Sleeve.
The CCB® Sleeve is inserted into the end of an internally lined pipe (Figure 1.3). A second internally coated pipe is then slipped over the protruding half of the CCB® Sleeve so that both ends of the pipes are touching the weld nubs. Both pipe ends are now spaced the proper distance apart for welding.
The CCB® Sleeve installation is completed with a simple welding procedure. The process ensures 100% internally coated pipe. The Cylindrical Corrosion Barrier Sleeve removes those inevitable doubts about how well the weld area is being protected when using remedial methods such as retro coating pigs; or, the possible health concerns that arise by using personnel to physically move through the pipe and paint the damaged area in larger diameter piping.
After the CCB® Sleeve is installed, the installation crew can move forward knowing that a permanent solution to girth weld corrosion has been accomplished with no extra effort on their part.
The Cylindrical Corrosion Barrier Sleeve represents a long awaited technological advancement for internally coated pipeline installations. The CCB® Sleeve is the most simplistic and efficient method to provide positive corrosion protection in a traditionally troubled spot for all internally coated pipeline systems.
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