Sleeving required in ex application

[JohnFG]

We require a sleeving material (about .5" dia) that will be used to house low powered electronic sensors that will be submerged in tanks containing crude oil & salt water.
If anyone can suggest where we might look for sleeving material that would meet the electrical requirements of UL an CSA in this type of application I would appreciate it very much.
Thank you in advance,
John

 

[pic16c74]

Can you be more specific? When you say submerged in crude oil and salt water, do you mean in a 55 gal drum or down the hole in an oil well (10.000 ft below surface, at 350F) also, what kind of use are you implementing? temp sensor? pressure? pH? is it running DC or AC (frequency?) all this will mean a different enclosure and sleeving.

 

[JohnFG]

The application for this sleeving is in crude oil and salt water tanks that are less than 30 feet high. Temperatures range from -40c to +50c. The pressure is atmospheric. The system will be dc powered drawing less than 100 mA.

Thanks,
John.

 

[Foxfur]

Hi JohnFG!
I built "temp sensor chains" that were 30 feet in length for measuring the temperature gradients in the Columbia river (Oregon). These were MUX'ed thermistor arrays that had a thermistor on a MUX/amp PCB that were seperated by about a foot of hookup wire between nodes. I used polyester-strand reinforced ether-based polyurethane tubing, reinforced to minimize stretch in the swift river currents. I backfilled the tubing with one of Dow Chemical's heat transfer oils (DOWTHERM RP as far as I can remember) to improve thermal conductance and keep water out. You can get this tygon tubing from

http://www.ColeParmer.com

(F-4040-A). Their prices are kinda spendy though. At least get their free tubing test kit:

FREE OFFER! NEWLY UPDATED MASTERFLEX® TUBING KIT MAKES IT EASY TO TEST CHEMICAL COMPATIBILITY!

Vernon Hills, Illinois, October 8, 2002—The newly updated Masterflex® Tubing Test Kit— available FREE of charge—is a simple way to test chemical compatibility with Masterflex pump tubing. The kit contains samples of 15 different Masterflex tubing formulations, including recently added extended life platinum-cured silicone, PharMed® high-pressure, and PTFE tubing. The kit comes with simple instructions on quickly testing the compatibility of any chemical.

For more information,
contact the Cole-Parmer Instrument Company,
625 E. Bunker Court, Vernon Hills, IL 60061-1844.
In the U.S. or Canada, call toll-free
1-800-MASTERFLEX (1-800-627-8373).
International customers can call (847) 549-7600.
Or visit our web site at

http://www.masterflex.com

(From

http://www.coleparmer.com/techinfo/techinfo.asp?htmlfile=Press_9999936_tubing_kit.htm

)

There are several other lower priced suppliers out there;
ALSCO (

http://www.alscoind.com/onlinecat.htm

) Very low prices!!

Ryan-Herco (

http://www.ryanherco.com)

Look at their TygoThane reinforced tubing.

Harrington plastics (

http://www.harringtonplastics.com

)

Hope this helps,
Ff

 

[JohnFG]

Thanks for the help. I will check out Raychem. I have recently searched for "flexible conduit" and seem to be getting closer to what is required for our product.
Regards,
John