Visit our website: www.jsicoatings.com
Call: (936) 321-3333
Email: steve@jsicoatings.com

Friday, May 19, 2017

Insulating Sleeve - TS2 / TS4 / TS6 / TS10 / TS12

Insulating Thermocontractile Sleeves

     Very often, we find that product nomenclatures can be different between end users, contractors and manufacturers.  In those cases, it can sometimes require some detective work to determine what product is actually being requested.  As one great example - let's look at an inquiry that I've seen this week.

TS2 -
THERMOCONTRACTIL SLEEVE 2". INSULATING SLEEVE, MATERIAL THERMOCONTRACTILE, USE PIPE, DIAMETER PIPE 2', TYPE ABIERTA, SLEEVE WIDTH 2 IN, MAXIMUN SERVICE TEMPERATURES 65 *C.

TS4
THERMOCONTRACTIL SLEEVE 4". INSULATING SLEEVE, MATERIAL THERMOCONTRACTILE, USE PIPE, DIAMETER PIPE 4', TYPE ABIERTA, SLEEVE WIDTH 4 IN, MAXIMUN SERVICE TEMPERATURES 65 *C.

TS6
THERMOCONTRACTIL SLEEVE 6". INSULATING SLEEVE, MATERIAL THERMOCONTRACTILE, USE PIPE, DIAMETER PIPE 6', TYPE ABIERTA, SLEEVE WIDTH 6 IN, MAXIMUN SERVICE TEMPERATURES 65 *C.

TS8
THERMOCONTRACTIL SLEEVE 8". INSULATING SLEEVE, MATERIAL THERMOCONTRACTILE, USE PIPE, DIAMETER PIPE 8', TYPE ABIERTA, SLEEVE WIDTH 8 IN, MAXIMUN SERVICE TEMPERATURES 65 *C.

TS10
THERMOCONTRACTIL SLEEVE 10". INSULATING SLEEVE, MATERIAL THERMOCONTRACTILE, USE PIPE, DIAMETER PIPE 10', TYPE ABIERTA, SLEEVE WIDTH 10 IN, MAXIMUN SERVICE TEMPERATURES 65 *C.


TS12
THERMOCONTRACTIL SLEEVE 12". INSULATING SLEEVE, MATERIAL THERMOCONTRACTILE, USE PIPE, DIAMETER PIPE 12', TYPE ABIERTA, SLEEVE WIDTH 12 IN, MAXIMUN SERVICE TEMPERATURES 65 *C.

I can tell you from experience - searching TS2 shrink sleeve brings up absolutely nothing in google.  But if you are trying to figure out what the TS product line is -- give me a call (936/321-3333) or email me (steve@jsicoatings.com) and I can help!

Friday, April 28, 2017

Cut Shrink Sleeves versus Roll Shrink Sleeves



Advantages of Cut Pieces over Roll Stock
     When purchasing shrink sleeves, you have a couple of options.  You can purchase bulk rolls of material and also purchase closures (and perform the cutting labor yourself), or you can purchase individually cut sleeves.  Both have some advantages and some disadvantages.  I will list those below:

Purchasing Bulk Rolls and Closure Strips
Advantages:
·         Can offer some material cost savings in some cases
·         Offers great flexibility as any shrink sleeve size can be cut as needed from the bulk roll
Disadvantages:
·         You end up with potentially unusable tailings when the roll gets low
·         Easy for a contractor or laborer to make mistakes and cut sleeves to the wrong size
·         Easy for someone inexperienced to nick/cut the shrink sleeve material in the wrong place causing a field issue
·         Two part shrink sleeves (where the sleeve material and closure are supplied separately) represent the bulk of all field service problems in the industry
·         Installing a two piece sleeve is a bit slower and labor intensive; one more thing that could go wrong if the contractor is inexperienced. 

Purchasing Cut Pieces:
Advantages:
·         No wasted tailings, everything you have is usable
·         /Uni sleeves – easier installation for construction crew when a one piece sleeve is supplied
·         No lost closures or damaged master rolls
·         In our shop, we have the proper equipment for quality control and fast turnarounds
·         No need to stock thousands of feet in rolls at a time; inventory levels can be much more economical.
Disadvantages:
Slightly higher material cost in some cases – but must be weighed against lowered labor cost

Monday, April 17, 2017

WPCT Shrink Temperature

At What Temp do Shrink Sleeves Shrink?

     As you might expect, this is actually not a simple question.  Shrink sleeve backing can be made from many different material types.  Each of those material types have their own chemical make up - and as a result; can often have different crystalline melt points.  The crystalline melt point is the temperature at which the structure of the backing begins to melt.  If the backing has been crosslinked it doesn't melt, it instead shrinks back to its original dimension (pre-stretch). 

     With most of our Covalence (formerly Raychem) heat shrinkable sleeves (products like WPCT, TPS, WPC100M, HTLP60, DIRAX, etc) that backing is comprised of a modified polyethylene (a polyolefin).  Speaking generally, the crystalline melt point of those product is ~267F.  That means that the backing temperature must reach 267F (minimum) before the sleeve will begin to shrink.  This could certainly be done in an oven or some other situation - but what we see most is the heating taking place with a propane torch (propane torch with a broad bushy flame). 

     Most of the time, we see our shrink sleeves installed on a steel pipeline, overlapping onto some form of a factory applied corrosion coating (FBE / Powercrete / TLPE / etc).  In those cases, that installation temperature is not a big deal.  Most of those coatings (FBE and TLPE at least) are often seeing temperaturese greater to or equal to that during the original application time.  In some cases though, there are cases where someone wants to install a shrink sleeve on something else - perhaps a PE line; or some sort of flexible composite material. 

     In cases like that, it is always critical to speak to the manufacturer of your non-steel pipeline to find out what temperature range those materials are able to withstand without sacrificing their integrity or performance.  I couldn't possibly be an expert in every type of specialty tubing, so please rely on the folks you purchased the pipe from to determine what is acceptable if you're using something significantly different than standard steel pipeline tubing.