Plug for heat exchanger tubes
Patent
·
OSTI ID:6602910
A heat exchanger tube plug is described for sealing the ends of heat exchanger tubes, comprising a cylindrical housing member sized for insertion within the end portion of one of the heat exchanger tubes, the housing member having a longitudinal blind bore comprising a smooth portion communicating with a threaded portion. An eccentric locking means is mounted on the housing member for locking the inserted housing member against rotation relative to the heat exchanger tube, and an insert member has a threaded end portion received within the threaded portion of the bore. An enlarged portion is positioned to be drawn within the smooth portion of the bore in response to rotation of the insert member threaded end portion in the bore threaded portion. A tapered portion is between the end portion and the enlarged portion, the tapered portion and the enlarged portion being sized to cause the smooth portion of the bore to expand, thereby providing a seal between the housing member and the heat exchanger tube.
- Assignee:
- NOV; NOV-87-055304; EDB-87-088805
- Patent Number(s):
- US 4653540
- OSTI ID:
- 6602910
- Country of Publication:
- United States
- Language:
- English
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