What is the significance of co-efficient of expansion? How significance in case of LPG?

Question

Coefficient of expansion for LPG is 0.0016. What does it signify? What we can feel of LPG with this property?

Answer 1

The coefficient of expansion determines the extent to which a material will expand when it is heated or contract when it is cooled.
The C of E of LPG is 0.0016. You did not specify the units. The number indicates how much the length will increase per unit for each degree of temperature increase.
We cannot feel anything of LPG with this property. LPG has a high coefficient of thermal expansion and the over filling of tanks and cylinders can result in hydraulic rupture.

Answer 2

The coefficient of expansion usually refers to thermal expansion (although there's also moisture expansion and maybe some others). It is measured in strain / degree C, so LPG (I don't know what that is exactly) expands 0.16% per degree C. This is actually quite a bit as thermal expansion coefficients for metals are on the order of 10^-6.

If you're not familiar with strain, it is usually measured as mm / mm and then given as a percent. So a strain of 0.01 would mean a material is 0.01 mm longer for every mm in length it was originally.