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US 5,152,323 AGranted
Plastic-lined pipe
AssigneeAllied Tube & Conduit Corporation
InventorsDavid A. Shotts, Raffaele Basile
Life of this patent
Estimating the term…
Abstract
A plastic-lined metallic pipe including an outer metallic pipe which supports an inner plastic sleeve with mechanical engagement between the plastic sleeve and the metallic pipe throughout the circumference of the sleeve. The metallic pipe has a longitudinal weld and the plastic sleeve is melt-bonded to the metallic pipe along the weld only.
Claims7
A plastic-lined metallic pipe comprising:
- a continuous inner plastic sleeve;
- and
- an outer metallic pipe, said outer pipe having a longitudinal weld, said plastic sleeve being melt-bonded to said outer pipe only along said weld, the outer diameter of said plastic sleeve being substantially equal to the inner diameter of said outer pipe so that there is mechanical engagement about substantially the entire circumference of said sleeve, said plastic sleeve constituting an uninterrupted lining for said metallic pipe.
Dependencies are inferred from the claim text.