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| Issue Number 3 |
APRIL 2009 |
Tubing & Hose Buying Tips
#3: Temperatures
It can be challenging to make sure you’ve covered all the bases during the tubing and hose selection process. Have you considered all the elements involved with the application? Temperatures, chemicals, pressures, flexibility needs? In Tubing & Hose Buying Tips we’ll address common selection factors, one at a time, in each issue of extrusions.
 Tip #3 addresses temperature requirements. Several things need to be investigated when it comes to tubing, hose, and temperatures. The first item that usually comes to mind is whether the tubing or hose being considered can withstand the temperature of the product traveling through it, whether that product be a liquid, gas, dry material, or even electrical wiring. But you also need to think about the temperature of the environment it’s in. Will the tubing be inside a controlled environment that’s kept at a constant 72°F? Will it lay next to other equipment that throws off heat? Will the hose or tubing be outside and subject to both heat and cold, plus variable sunlight? Will it need to operate and remain flexible below freezing?
Another thing to keep in mind is that the higher the temperature, the less pressure the tubing or hose can handle. Your application may be well served with, for instance, 1/4” silicone tubing conveying water at 200°F and a working pressure of only 20 psi at 70°F. But if the temperature increases to 300°F, your pressure handling capabilities will decrease. Reinforced silicone hose should then be considered.
PREVIOUS TUBING & HOSE BUYING TIP
#2: Pressure & Vacuum
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