Wood in the high temperature coefficient of expansion will obviously, consumer can carry on some simple wooden through the maintenance, prevent the "heatstroke".

If the valve body material can be welded, but very different thermal expansion coefficient, or changes in operating temperature range of a larger thread junction closure weld must be honey.

The color glaze of low firing temperature and low expansion coefficient, to match the glaze tile made from common clay, was prepared in lead borosilicate system.