Plastic and nonmetallic article shaping or treating: processes – Forming structural installations in situ – Uniting preform member with molding material
Reexamination Certificate
2008-05-20
2008-05-20
Lee, Edmund H. (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Forming structural installations in situ
Uniting preform member with molding material
C264S262000, C264S269000, C264S333000
Reexamination Certificate
active
11454339
ABSTRACT:
A method for installing a fiberglass or stainless steel liner into a steel casing which results in a reduction of strain on the casing. Conventional means are used to place the liner into the casing and to fill the annular space with cement. Thereafter, maximum design operating pressure on the liner is maintained while the pressure on the annular space is reduced; maintenance of those pressures keep the liner in an expanded state while the grout cures. As a result, the liner shares the load with the casing; pressure from the fluids contained in the system during operation is not transferred to the casing through the grout until the liner's preset internal pressure is reached. The use of the method greatly reduces the possibility of flowline failure.
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Gaskin Mary J.
Lee Edmund H.
Unisert Multiwall Systems, Inc.
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