Frangible sealing plug for pipelines
AssigneeCherne Industries Incorporated
InventorMarc P. Bevacco
Life of this patent
Estimating the term…
Abstract
A frangible sealing plug for pipelines comprising a unitary disc shaped fluid impermeable body having a plurality of score lines on one side, and a peripheral score line on the opposite side adjacent a peripheral sealing structure. The peripheral sealing structure abuts the end of a pipeline section. The impermeable sealing plug is preferably molded of a plastic composition. The plurality of score lines includes at least one radially disposed score line and at least one concentric score line. The frangible sealing plug is positioned in the end of a pipeline section to hold a testing fluid backpressure. After testing, the disc shaped body is separated into a plurality of pieces along the score lines by a removal device.
Claims25
A frangible sealing plug for pipelines comprising:
- a) a disc shaped fluid impermeable body having a peripheral member for sealing abutment against the end of a pipeline section, said disc shaped body having a first side, a second side, a diameter and a body thickness;
- b) a plurality of score lines disposed in said first side of said disc shaped body;
- and
- c) a continuous peripheral score line disposed in said second side of said disc shaped body, said plurality of score lines extending in said first side of said disc shaped body and terminating spacially opposite adjacent said peripheral score line in said second side, whereby said sealing plug is constructed and arranged to be secured in a pipeline at the end of a pipe section and to hold a predetermined fluid backpressure and wherein said score lines in said first side and second sides of said disc shaped body cooperate to separate said disc shaped body into a plurality of pieces along said peripheral score line when engaged by a removal device.
A frangible sealing plug for temporarily sealing a pipeline comprising:
- a) an impermeable body portion having peripheral means for securement in a pipeline;
- b) said body portion having a first side, a second side and a plurality of score lines constructed and arranged in said body portion to cause said body portion to be separated into a plurality of pieces, said plurality of score lines comprising a peripheral score line positioned adjacent said peripheral means for securement and further having a plurality of intersecting score lines, said plurality of intersecting score lines including at least one elongated score line and at least one generally round score line.
A frangible sealing plug for temporarily sealing pipelines comprising:
- a) a fluid impermeable body having a center and a plurality of score lines;
- b) said body portion having a peripheral sealing edge for securement in a pipeline;
- c) a peripheral parting line adjacent to said peripheral sealing edge;
- and
- d) a concentric score line positioned between said center and said peripheral sealing edge of said body.
A method for temporarily sealing a pipeline comprising:
- a) securing a frangible sealing plug in a pipeline system, said disc plug being constructed and arranged to separate into a plurality of pieces and having a peripheral breaking line in alignment with the inner diameter of said pipeline, said frangible sealing plug further being comprised of a disc shaped body and a sealing means, said peripheral breaking line being peripherally disposed between said disc shaped body and said sealing means, said disc shaped body further having at least one score line;
- b) testing the pipeline system for leaks;
- c) breaking the plug into a plurality of pieces by an upstream force along said peripheral breaking line and said at least one score line;
- and
- d) flushing said pieces down said pipeline to restore full fluid flow in said pipeline.
A frangible sealing plug for pipelines comprising:
- a) a disc shaped fluid impermeable body having a peripheral member for sealing abutment against the end of a pipeline section, said disc shaped body having a first side, a second side, a diameter and a body thickness;
- b) a plurality of score lines disposed in said first side of said disc shaped body, said plurality of score lines including at least one elongated score line and at least one generally round score line intersecting said at least one elongated score line;
- and
- c) a peripheral score line disposed in said second side of said disc shaped body, whereby said sealing plug is constructed and arranged to be secured in a pipeline and to hold a predetermined fluid backpressure and wherein said plurality of score lines in said first side and said peripheral score line in said second side of said disc shaped body cooperate to separate said disc shaped body into a plurality of pieces along said peripheral score line when engaged by a removal device.
Dependencies are inferred from the claim text.