Heater for pipe

A heater for a pipe, the heater comprising:

• a heater body part extending axially in a longitudinal direction and including a plurality of circumferential segments, and the heater body part having a radially inner surface and a radially outer surface;
• wherein each of the circumferential segments comprising:
• a heating wire installed therein;
• and
• first and second restraint operating parts configured to fasten the circumferential segments to each other,
• first and second longitudinal cutting planes that are located opposite each other in a circumferential direction, each of the first and the second longitudinal cutting planes includes:
• a longitudinal outer cutting area disposed in a radial thickness direction inwardly from the outer surface,
• a longitudinal intermediate cutting area extending from the longitudinal outer cutting area in a circumferential direction of the heater body part, the first and the second restrain operating parts each being secured to the intermediate cutting area of the corresponding longitudinal cutting plane, and
• a longitudinal inner cutting area extending inwardly from the longitudinal intermediate cutting area to reach the inner surface of the heater body part in the thickness direction of the heater body part,
• wherein the outer, the intermediate and the inner cutting areas of the first and the second longitudinal cutting planes are configured such that the first longitudinal cutting plane of one of the circumferential segments mates with the second longitudinal cutting plane of an adjacent circumferential segment, and the first restraint operating part of the circumferential segment couples the second restraint operating part of the adjacent circumferential segment and fastens the circumferential segments to each other.

A heater fora pipe, the heater comprising:

• a heater body part defining a longitudinal axis, and the heater body part having a radially inner surface, a radially outer surface, a longitudinal cutting plane and a circumferential cutting plane and including a plurality of bi-directional segments;
• a heating wire installed within the heater body part;
• and
• a restraint operating part configured to restrain the heater body part in a cylindrical shape,
• wherein the longitudinal cutting plane extends in a radial thickness direction of the heater body part from the radially inner surface to the radially outer surface of the heater body part and includes:
• a longitudinal outer cutting surface extending radially inward in the thickness direction from the radially outer surface,
• a longitudinal intermediate cutting surface extending from the longitudinal outer cutting surface in a circumferential direction of the heater body part, and
• a longitudinal inner cutting surface extending radially inward in the thickness direction from the longitudinal intermediate cutting surface to the radially inner surface of the heater body part, and
• wherein the circumferential cutting plane extends in the thickness direction of the heater body part from the radially inner surface to the radially outer surface of the heater body part and includes:
• a circumferential outer cutting surface extending radially inward in the thickness direction from the radially outer surface,
• a circumferential intermediate cutting surface extending from the circumferential outer cutting surface in a longitudinal direction of the heater body part, and
• a circumferential inner cutting surface extending radially inward in the thickness direction from the circumferential intermediate cutting surface to the radially inner surface of the heater body part, and
• wherein each of the plurality of bi-directional segments comprises:
• first and second longitudinal cutting planes located opposite each other in the circumferential direction, and first and second circumferential cutting planes located opposite each other in the longitudinal direction;
• the longitudinal intermediate cutting surface of each of the first and the second longitudinal cutting planes having a restraint operating part fixed thereto;
• and
• the restraint operating part of the first longitudinal cutting plane of the bi-directional segments engaging the restraint operating part of the second longitudinal cutting planes of the bi-directional segments such that the bi-directional segments couple each other in the circumferential direction and form a cylindrical longitudinal segment of the heater body part.