Features of PB Products
Comparison of Physical Properties of Piping Materials
The thermal conductivity for PB pipe is lower than metal pipe. Therefore, Therefore, it can supply hot water more efficiently than metal pipe.
However, in case of long-distance piping or to minimize heat loss, use a thermal insulation material.
|Materials||Thermal conductivity (kcal/m‧hr‧℃)||The rate when PB Pipe=1|
The coefficient of linear expansion of PB pipe is very low, about 1/60 of that of metal pipe. So, when the PB pipe is buried in concrete, the friction of the concrete can sufficiently hold the extension of the pipe. For this reason, it is almost not necessary to consider the expansion and contraction of the pipe by heat during PB piping work.
|Materials||Coefficient of Linear Expansion(℃-1)||Tensile Modulus(㎏f/㎠)|
This test was conducted using a short pipe,
and the test results should not be applied to the actual piping.
For example, when a long pipe is frozen, there is no problem if the whole pipe is frozen evenly at the same time. However, if the increase in volume due to freezing is concentrated on a part of the pipe, there is a possibility of breakage. Therefore, if you worry about the freezing of plumbing pipe, please take anti-freezing measures such as using antifreeze, removing water from the pipe, or using insulation.