69.What is the boiler expansion? How much will be the expansion of a boiler at burner level?

Boilers will expand when subject to heating. To allow the expansion, they will be either supported from top by hanging or from bottom.

As a thumb rule, for every 100 Deg.C. per meter, the expansion from fixed support, will be 1.5 mm.

A 800 T/H capacity boiler, will expand to a maximum at the end will be 150 mm.