Pipeline lining
AssigneePhillips Petroleum Company
InventorsHarvey E. Svetlik, Roy F. Wood
Life of this patent
Estimating the term…
Abstract
A multi-diameter plastic flange adapter that is fused to an end of a thermoplastic tube liner. The plastic liner and multi-diameter plastic flange adapter are inserted in a flanged pipe and air therebetween is evacuated thru a vent pipe.
Claims14
A thermoplastic flange adapter for fusing to an end of a thermoplastic tube, said flange adapter having a first end and a second end and being characterized by an annular flange at the first end and a generally tubular portion attached normally to the annular flange, said tubular portion having an exterior surface defining a first generally cylindrical portion having a first end and a second end connected by its first end to the flange, a first outside diameter next to the flange and a second generally cylindrical portion having a first end and a second end connected by its first end to the second end of the first generally cylindrical portion, said second generally, cylindrical portion having a second outside diameter less than the first diameter, an annular shoulder separating the first diameter from the second diameter, wherein the tubular portion further defines a third generally cylindrical portion having a first end and a second end and a third outside diameter smaller than the second outside diameter connected by its first end via a flared or tapered shape to the second end of the second generally cylindrical portion with the second outside diameter being between the first generally cylindrical portion having the first outside diameter and the third generally cylindrical portion having the third outside diameter, the second end of the third generally cylindrical portion corresponding to the second end of the flange adapter to form a transition section for fusing the thermoplastic tube to the flange adapter.
A pipe fitting characterized by an end flanged pipe having an annular flange and a first inside diameter at the flange end and a second inside diameter smaller than the first inside diameter spaced apart from the flange and an annular shoulder positioned between the first diamater and the second diameter, and further characterized by a plastic liner having a plastic flange adapter affixed thereto, said flange adapter having a flange end with an annular flange and a generally tubular portion attached normally to the annular flange, said annular flange being positioned against the end flange of the pipe, the tubular portion of the flange adapter having a first outside diameter at a position adjacent to the flange which is closely received by the first inside diameter of the pipe and a second outside diameter which is closely received by the second inside diameter of the pipe and a shoulder between the first outside diameter and the second outside diameter which is positioned against the annular shoulder of the pipe.
Dependencies are inferred from the claim text.