Plastic-lined conduit
Patent
·
OSTI ID:6556247
In a means of terminating a plastic liner in a conduit, the assembly consists of a fitting into which the end of the plastic liner and the end of the conduit are threaded so that the fitting seals the annulus between the liner and the conduit and the liner is anchored to the conduit. The fitting can be a coupling for the conduit with a plastic reducing nipple threaded into the coupling so that the smaller end of the reducing nipple extends through the coupling. The plastic liner is then welded onto the small end of the reducing nipple and the conduit is then threaded into the coupling about the reducing nipple. A resilient gasket ring is placed about the reducing nipple to occupy the annular space between the nipple and the coupling. The threads are cut on the reducing nipple in reverse direction and are tapered and cut so that the small end of the reducing nipple is inserted into the coupling. (4 claims)
- Assignee:
- Phillips Petroleum Co.
- Patent Number(s):
- US 3264014
- OSTI ID:
- 6556247
- Country of Publication:
- United States
- Language:
- English
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