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

Tuesday, March 22, 2022

 Joint Specialists Pipe Coatings IN STOCK and READY to SHIP (March 2022)

     Joint Specialists has been a leading distributor of high quality pipeline coatings for more than two decades now.  Located in Conroe, Texas; JSI keeps a large inventory of material to support all of your pipe coating needs in our 20,000 square foot warehouse.  Below is a list of just a few of the different products we have available for immediate shipment.  Give us a call for pricing:  936/321-3333 or send an email:

Powercrete J:  Powercrete J is the premier two part epoxy coating for field joints on pipelines that will be involved with road bores and directional drilling applications.  Powercrete J is incredibly tough and has excellent resistance to the types of damage that can occur when a pipeline is dragged through a muddy hole.  Available in 2#, 4# and 10# kits, we have Powercrete J available in any quantity for immediate shipment.

Powercrete R65 / Powercrete F1:  Sometimes referred to as Powercrete R65 and sometimes referred to as Powercrete F1 (we call it Powercrete R65/F1) this excellent two part epoxy coating is loved in the field for its fast cure abilities.  Reducing labor costs in the field; Powercrete R65/F1 offers fantastic corrosion prevention properties and will protect your field joints, likely through the life of your pipeline.  Available in 1#, 2# and 4# kits (custom kits also available) we have Powercrete R65/F1 in stock and ready to go for immediate shipment.  

Powercrete R95:  Powercrete R95 is the HIGH BUILD epoxy option.  With the ability to apply a single coat in a 30 mil plus thickness (depending on installer skill of course) Powercrete R95 is an excellent coating that reduces field labor costs, reduces material waste and provides excellent corrosion resistance on pipelines.  Powercrete R95 is available in 2#, 4# or custom kit sizes as needed.  Material on hand and ready to ship.

Powercrete R65/F1 50ml Repair Cartridges:  Powercrete R65/F1 is available in repair cartridge form.  Sold in cases which consist of 25 each of the 50ml cartridges; 50 each of the static mixing tips and 1 each of the dispenser guns; these cartridges can be used to repair minor damage for Powercrete J, Powercrete R65/F1 or Powercrete R95 coatings (DD as well).  

Powercrete R65/F1 400ml Spray Cartridges:  Powercrete R65/F1 in spray form.  With multiple options for different spray tips (straight, right angle, etc) this is a beautiful coating that sprays on incredibly easily.  Generally sold in cases of 10 cartridges, this product is easy to apply.

BBS Bundled Bumper System:  When pulling multiple pipelines through a single bore hole in a bundle, it is important to do two things:  first you want to make sure there is no pipeline coating damage caused by those multiple lines colliding with one another.  Second, you want to make sure that when those lines reach their resting place (when the pull through is completed) you have space between the lines so that your CP can properly protect those lines.  That is where our BBS comes in.   

DIRAX:  The premier heat shrinkable sleeve coating solution for field joints on pipelines that will be involved with road bores and directional drills.  Utilizing a two part epoxy coating as the primary corrosion barrier and then adding in a single component (multi layer) heat shrinkable sleeve with a reinforced backing to make it incredibly strong offers unmatched physical coating characteristics to go along with the excellent corrosion prevention of an epoxy.  Add in a leading edge strip for even more protection on the front end of the line; and you've got yourself an excellent coating that will protect your field joint through the life of the line.

WPCT:  A wrap around shrink sleeve designed for use on standard 'drop in the ditch' application.  Utilizing a butyl mastic sealant, WPCT is rated for use on lines operating at up to 140F.  An excellent and economical solution to coat your field joints.  Available in 11", 17", 24" and 34" widths; WPCT is simple to install and offers excellent field joint coating protection.

WPC100M:  A butyl mastic wrap around shrink sleeve designed to be used on higher temp lines (176F onshore; 212F offshore); WPC100M is a very good coating.   

HTLP60:  In many parts of the world; three layer PE coatings are the factory applied coating of choice.  HTLP60 recreates that three layer coating on the field joints to give a homogenous pipeline coating.  Utilizing a two part epoxy as the primary corrosion barrier and then shrinking a PE sleeve with a hot melt adhesive over that wet epoxy to give it significant physical protection; HTLP60 is a great coating system for non-directional drilling applications.  

Caseal / Casing Seal:  A high shrink, highly reinforced backing helps Caseal to seal up the anulus between your casing pipe and your carrier pipe.  With fantastic penetration resistance; Casing seal prevents water ingress into your casing pipe which extends the life of the pipe significantly.  

FlangeSeal:  Likewise, Flange Seal is a high expansion, heat shrinkable material designed to encapsulate your flange; seal down to the adjacent pipe AND be re-enterable at a later date (by cutting/destroying the Flangeseal). 

WPC120:  High temp wrap around shrink sleeve designed to be used on pipelines operating at up to 248F.

TPS:   A slip on or tubular shrink sleeve.  Very similar to WPCT, TPS is supplied as a tube that must be slipped onto the pipe before the weld is made.  

Waterwrap WAB (weld after backfill):  A product specifically designed to be used on large Water pipe where the sleeve is often welded after this sleeve has already been installed.  

WCSM:  A heat shrinkable tube designed to seal up a splice on a low voltage cable connection (1000 volts). 

Wednesday, February 9, 2022

Quick and Easy to Install Pipeline Field Joint Coating

 WPCT:  Easiest Field Joint Coating Out There?

     In the world of field joint coatings, engineers have a variety of options to consider when selecting their preferred corrosion prevention technology.  For the sake of this specific article; I'll not be touching on technical aspects (cathodic disbondment, tensile strength, peel, shear, penetration resistance, etc).  Instead I'll be focused simply on installation method and special tools needed.

     Now the range of special tools need for applying a field joint coating is quote large.  To put fusion bonded epoxy onto a field joint will require an induction heating coil and equipment to act as a vehicle to get the powdered epoxy onto the steel of the pipe.  Two part epoxies (Powercrete J, Powercrete R65/F1 and Powercrete R95 are examples) require an anchor pattern in the bare steel and adjacent factory applied coating that is created with a grit/sand blaster.  

     Today we are looking at WPCT manufactured by Covalence (formerly Raychem).  WPCT has decades of successful use history with hundreds of thousands installed per year.  WPCT can be installed on a wire brushed surface that is free from all dirt, grease, dust or any other contaminant.  From there, all you need for the WPCT installation is a propane torch that is able to provide a broad, bushy flame.  That is essentially all.

     Inspection is easy as well.  The WPCT sleeve backing is supplied with a backing that looks like this:

A close up of the dimpled backing of the WPCT shrink sleeve as supplied

     After proper installation (WPCT shrink sleeve backing begins to shrink at 267F), the backing turns to a smooth backing thanks to wonder of radiation crosslinking:

WPCT shrink sleeve backing after proper installation.

     Is there a simpler field joint coating installation that can provide the excellent pipeline coating qualities that WPCT can?  I do not think so.

Monday, February 7, 2022

Zip Ties to Hold Bumpers on a Bundled Directional Drill?

 Zip Ties to Hold Pipe Bumpers on a Road Bore?

     I've had an interesting week.  There is a pipeline project going on out there that is using zip ties as the primary method of keeping pipe bumpers on the pipeline.  In this particular case, two 12" pipelines are being dragged through the same bore hole at the same time.  A bumper is needed there for a variety of reasons, but most importantly:

  1. To prevent pipe on pipe damage during the pull through
  2. To keep space between the pipelines to allow room for the cathodic protection system to do its job (pipe cannot be resting on pipe)
     In this case, I've had phone calls from an inspector on the line and from a QA employee who works for the end user.  In both cases the question was the same:  Do you think it is going to work if we have our bumpers secured with zip ties?  (not coincidentally; both people asked that their identities remain confidential of course). 

     My first response:  "WHAT???"
     My second response:  "Are you serious?"
     My third response:  "No, I don't think that is going to work."

     Now, everyone who has experience with a directional drilling application understands that tremendous forces are going to be put on the pipe.  That is the reason that Powercrete DD is such a sought after product!  It has excellent abrasion resistance, penetration resistance, gouge resistance, etc.  When that pipe that is travelling under ground collides with rocks and roots; the Powercrete DD is tough enough to survive without a scratch.  

     When you're pulling muliple pipelines through the same hole; at the same time -- those forces are all magnified.  Those lines are bouncing around in that hole; and bouncing off of each other if a proper bumper system isn't used (see JSI's bumper system here).  Consider more than one very heavy section of pipe; consider the forces when that pipe 'bounces' off of a rock -- and anything used in that situation had better be tough.  

     Say you're pulling 24" OD pipe through a bundled bore (along with a 12" line).  That 24" OD pipe might way 100 plus pounds per foot.  If you have a bumper of some kind on that line every 20 feet - that means each bumper is responsible for 2000 pounds of weight!  Now add in the massive spikes in force when that line collides with a rock!  Consider that there might also be a 12" line in that hole!  There could me more than 1 extra line (the most we have seen is 11 lines in 1 hole!).

     Those are incredible weights.  

     How much weight can a zip tie hold?  Keep in mind; even industrial zip ties are at most 1/2" wide (often 1/3" or less).  In my research, I do find a few zip ties that claim to hold 250 pounds and many more that claim to be able to hold 175 pounds or less.  If that 2000 pound figure that I cite up above (the weight of 20 feet of larger diameter pipe) for a stationary pipe; how much weight do those zip ties need to contain when that line bounces off of a rock; bounces off of another pipe; bottoms out in the bore hole as the pipe turns to head to the surface, etc.  Could you trust that to say 4 zip ties?  Absolutely not!!

     Meanwhile JSI's Bore Bumper System is proven over the course of hundreds of bores representing many, many miles of bundled bores.  Our system utilizes a material with a tensile strength of greater than 2500 newtons.  A simple conversion indicates that can be in the neighborhood of more than 500 psi.  Our system on a 20" line would have ~90 square inches of material permanently bonded to that pipe surface.  

     These aren't even two system that can be compared.  More than likely the zip ties begin popping shortly after the bundle enters the earth.  Soon after the bumpers likely begin falling off.  Shortly after that, the pipe likely begins to collide with each resulting in damage to your factory applied coating.  And then finally, the pipe very likely reaches its permanent resting place; with two steel pipeline resting on one another.  As time goes by and wet/dry and hot/cold cycles reign for weeks, months and years; the very expensive factory applied coating you paid for is worn away and massive corrosion problems occur.  All because someone chose to trust a zip tie.