Visit our website:
Call: (936) 321-3333

Tuesday, February 23, 2021

Powercrete R150

 Powercrete R150 Epoxy

     Powercrete R150 is an excellent, high build, novolac epoxy coating.  Used for both new construction and pipeline rehabilitation projects; R150 may just be the product you are seeking.  Rated for use on pipelines operating at up to 150C (302F), Powercrete R150 has been used all around the world.

     A few of the features of the Powercrete R150:

  • Can be sprayed or hand applied in a single pass with thickness as high as 30-40 mils
  • Excellent resistance to waste water and sulphuric acid
  • Can be used in directional drilling and road bore applications
  • Fantastic cathodic disbondment results
  • Excellent adhesion to FBE, Powercrete DD and steel

Monday, February 22, 2021

WPCT Wrap Around Shrink Sleeves

 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:

     Here you can see what I mean by the thermal indicator.  This is a picture of a partially installed WPCT shrink sleeve.  On the left; we see the backing as supplied.  The cross hatch pattern is imprinted in the backing of the sleeve after the sleeve backing has been expanded (which happens after crosslinking).  On the right side, we see what the sleeve backing looks like after proper installation:  a smooth PE backing.  This is a permanent change (I made this sample several years ago).  This means that the installers have a visible cue during the shrink process to see that they are properly shrinking the sleeve.  This also means that foreman can see that the sleeve is properly installed during and after the install process.

     For inspectors; this is a fantastic tool.  Sleeves can be inspected minutes, hour, days, weeks or months (or years) after the installation.  If there is a pattern on any section of the sleeve --- that sleeve needs more heat!  Simple.  

     In addition to this tool; there are others of course.  Mastic flow should be evident at all edges of the sleeve.  The sleeve surface should be fully conformed to the pipe.  The step down from adjacent factory applied coatings and weld bead profile should be evident.  

     WPCT is a fantastic product - easy to install - inexpensive - reliable.  Hundreds of thousands of currently active pipelines prove that to be the case.

Thursday, February 11, 2021

TPS Slip On Heat Shrink Tubes

 Covalence (formerly Raychem) TPS 

Tubular Pipe Sleeves / Slip On Shrink Sleeves

     Once upon a time (decades ago) the original heat shrink sleeves created by Raychem Corp were extruded tubes.   Wrap around shrink sleeves weren't developed until later.  The idea was simple though; prior to the weld being made, the shrink sleeve would be slid into place (and moved away from the weld joint).  Then the pipe would be welded; allowed to cool a bit and then the shrink sleeve would have been moved into its proper place (on top of properly preheated pipe); the release paper would have been removed and then the sleeve shrunk.  Simple. 

    Though TPS is no longer the TOP DOG (so to speak) in the pipeline coating world; or even in the shrink sleeves for corrosion prevention world; there is still quite a market for TPS slip on shrink sleeves (now manufactured by Covalence - a part of the Seal for Life family).  

     TPS shrink tubes are kept in stock at JSI's facility in Conroe, TX 77385.  We stock tubes that are specifically made for the following pipe outside diameters:

Sleeves are also made for 10.75" OD and 12.75" OD but we have never found much of a market for them.  They can be available in larger quantities though. 

     What are some of the great features of a TPS shrink sleeve?  
  • The butyl mastic is quite forgiving, meaning that the product can be installed on pipe that is wire brushed clean (and free of dirt, grease, etc).  
  • The product can be installed on pipe that has been preheated to only 140F (hand hot)
  • The installation process is quite simple:  clean, preheat, slide into place, shrink.  
  • Decades of use successful use history.  Despite what you may see in some of our competitors advertising; TPS is a great product.  In my 20 years I've not heard of a single failure or a single problem caused by this product.  If you have experienced one; please reach out and let me know about it:

     One of the greatest features of (many) Covalence shrink sleeves is the PCI (permanent change indicator).  Over the years it has also been called a permanent thermal indicator. This is a close up of the TPS sleeve backing (easily visible to the naked eye even without a close up as you can see in the first photo up above).  This cross hatch pattern in the TPS disappears as the shrunk tubing is properly shrunk; fading to a clean, smooth black surface.  

     This allows installers to see that they are properly shrink the TPS sleeve - and it allows inspectors; even if they a day or a week late; to see that the sleeve was properly shrunk.  It is a wonderful tool!.

     Now if you're looking for a product other than TPS; I would certainly love to speak to you about that.  Maybe you're looking for Canusa's PLA product.  Much like the TPS, PLA is a slip on (slide the shrink sleeve in place before the pipe is welded up) shrink sleeve.  I would love to talk to you about it.

    Likewise, maybe you're looking for heat shrink tubing that is designed for substrates smaller than 2.375".  Maybe you need something for 1" pipe and perhaps our Flexclad heat shrinkable tape would be the perfect product for you.  Maybe you're looking for something even smaller and you need Raychem's WCSM - low voltage heat shrink for splicing and sealing up cable connections (and cable repairs).

     No matter what your application is, I would love the opportunity to talk to you about the different options we might have available for you.