Patent ID: 8378264

Claim:
A heater for piping, the heater comprising: a plurality of shells connected via hinges, the shells being adapted to be mounted on an outer circumferential wall of piping having a circular cross section to enclose the piping and form a polyhedron along the piping; thermal insulators disposed over entire surfaces of inner walls of the shells and the thermal insulators remote from outer circumferential wall when the heater is mounted on the piping; a plurality of molds disposed at the inner walls and adapted to abut on the outer circumferential wall in a mounted state; and a plurality of heating elements disposed to be positioned in a space formed between corners of the polyhedron and the outer circumferential wall and to extend in a longitudinal direction of the piping in the mounted state, the plurality of heating elements remote from the thermal insulators and remote from the outer circumferential wall when the heater is mounted on the piping.