Electric heating – Inductive heating – Specific heating application
Reexamination Certificate
2011-05-03
2011-05-03
Robinson, Daniel (Department: 3742)
Electric heating
Inductive heating
Specific heating application
C219S635000
Reexamination Certificate
active
07935915
ABSTRACT:
A heating apparatus for heating a pipe prior to performing a welding operation, an interpass welding operation, or a hydrogen bake-out operation is provided. The heating apparatus comprises at least one heating collar placed on one side of a pipe weld joint and a control mechanism for controlling the thermal energy transferred from the heating apparatus to the pipe.
REFERENCES:
patent: 7256374 (2007-08-01), Regan
Bundren William J.
Haugen J. Jay
Robinson Daniel
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