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Gilson Engineering Sales, Inc. 


August, 2011 4
Chloride Stress Cracking in Tubing Bundles
Custom Instrument Enclosures
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I Wanted to give you an update on some new products, and some technical tips on O'Brien insulated enclosures, and pre-insulated tubing bundles.  Let us know if we can be of any assistance.



Tech Tip


Properly installing tubing bundles can prevent maintenance issues down the road.  You can view a video on the proper installation techniques of tubing bundles by visiting the following link.


Tracepak video

Click above to view tutorial of tubing bundle installation


Chloride Stress Corrosion in Tubing Bundles


Chloride stress corrosion cracking (CSCC) is certainly not a new problem nor is it specifically related to tubing bundles. In fact, controlling or eliminating this type of failure is much more attainable in a premanufactured tubing bundle than with field construction.


O'Brien is the only manufacturer of tubing bundles that uses Chloride-free Urethane outer jacketing.  This reduces the chances of Chloride stress corrosion.  Also, the Urethane jacket remains pliable down to -40oF, where PVC jacketing becomes difficult to work with at colder temperatures.


Learn more about the causes and prevention of Chloride stress cracking in tubing bundles:


Download article on Chloride Stress Corrosion Cracking



Custom Instrument Enclosures


Rosemount coplanar
Enclosure for Rosemount coplanar

Many customers have requested that O'Brien design custom insulated instrument enclosures for their applications.  O'Brien has an on-site engineering staff that is eager to assist customers with their special requests.  One common request if for transmitter enclosures with the electronics outside of the box to prevent overheating.  O'Brien has designed these 'Split-top' enclosures for many models of transmitters from Honeywell, Rosemount, and others.






Honeywell Split top enclosure
Split top enclosure for Honeywell transmitter