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Thermal expansions and contraction

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Sachinkathe

Mechanical
Joined
Jan 7, 2009
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13
Is there any thumb rule available for knowing the thermal expansion or contraction (directly propprtional to length and delta T) of routed cs, ss pipes because in 31.3 tables are for mm/100 ft and that also as per temperatures.

Sachin
 
There is no rule of thumb. It is a simple mathmetical calculation based on the coefficient of expansion for the material, the length and the temperature difference.

rmw
 
Yes inshort I need a thermal expansion coefficient of CS and SS based on delta temp.

Sachin
 
Google "thermal expansion of metals"

[α] CS = 6.5 x 10-6 in/in-Fº
others,

**********************
"Pumping accounts for 20% of the world’s energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies)
 
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