WPCT Standard Shrink Sleeves
WPCT was one of Raychem Corps great advances in the world of heat shrink sleeves that dates back quite a few years. Many times over the years, WPCT heat shrink sleeves have been the absolute work horse of the Raychem product line. A very field friendly shrink sleeve; utilizing a butyl mastic sealant; there are literally millions of WPCT shrink sleeves currently in use on underground piping across the world. Looking only at my little slice of that business; I can say with certainty that we have sold more than one million WPCT shrink sleeves in recent years.
In my twenty one years of experience selling WPCT wrap around sleeves; how many "failures" have I heard of? None. How is that possible? The product type and lot numbers are printed on every sleeve. As we all know; detailed records are kept of pipeline coating solutions that are installed on pipelines across the USA and across the world. When a corrosion problem occurs; it is quite easy to determine what is going on. Especially when pipe is dug up and evaluated; it is very easy to determine what has gone wrong with a visual inspection. And in my decades of experience, I've not had a single call. Why is that?
I believe it is because the thermal indicator built into the WPCT shrink sleeve backing: