Corrosion resistant insert
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United States of America Patent
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-
Jun 1, 1993
Issued Date -
N/A
app pub date -
Jun 13, 1991
filing date -
Sep 12, 1990
priority date (Note) -
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status (Latency Note)
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Abstract
A corrosion resistant insert of the present invention is used for fitting at an opening in a metallic liquid tank. The insert has an open end, a radially outwardly extending lip at the open end, a closed end and an axially extending side wall spacing the open end and closed ends from one another. The closed end has a displaceable portion secured to the insert in a preweakened manner which facilitates opening in one direction while resisting opening in the other direction. The use of the insert in the tank enables lining and then pressure testing of the tank ready for fittings after which the closed end of the insert is opened to allow liquid flow through the tank when the tank is in use.
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