# Need help finding a table of thermal lateral pipe expansion?

#### Volvo802

Hey there. First post here.
I am creating a study guide for myself to keep on the job. I am not sure how to calculate thermal expansion mathematically, and I was looking for a table. Is there such a thing online?
I have my plumbing 3 book from class, however the book has two different representations of thermal expansions, and they are different from eachother, so once must be wrong. Possibly both. Does anyone have a solution to this?
It is defined as:
Thermal expansion of pipe in inches per 100 feet from 70 degrees fahrenheit.

Thank you, hoping to contribute as much as I ask here.

#### Agile

This can be a very complicated subject as copper tube will expand longitudinally as well as across its diameter.

In plumbing the only normal significance is the longitudinal expansion of long straight runs such as in factories. This is usually accommodated by a telescopic convoluted section or a dogleg.

Rarely significant in day to day plumbing except in a commercial environment.

Tony

#### gaswizzard

Anchors and bellows being the correct terminology.

#### Agile

If I had said that then 99% of the others reading would not understand what I was refering to!

On my technical writing course we were taught the importance of using simple words to describe things and to avoid jargon.

The objective is to have a low value of fog factor! ( Whats a "fog factor" ? )

#### Nige F

Anchors and bellows being the correct terminology.
A boat appliance and a fireside appliance

#### Volvo802

http://www.engineeringtoolbox.com/linear-expansion-coefficients-d_95.html

Thankyou! however I have no idea how to use a coeffecient in order to find my answer! lol. I will have to use the world wide web again to see if someone can put it in a simple formula for me.

@Agile. Thankyou, however I do work commercially at hospitals and other places on occasion. This is also for class as well, as this will be on our finals. The teacher is a twit and cannot find this information himself. He doesn't even know how to use a computer