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US 12,151,428 B2Granted
Method of lining branch area in pipeline
AssigneePicote Solutions Oy Ltd.
InventorMika Lokkinen
Life of this patent
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Abstract
A method of lining a branch area in a pipeline using an inflatable bladder. The method includes steps of preparing a branch liner with resin and positioning the branch liner in a pipeline, inflating the bladder and running a flow of air and steam through the bladder while monitoring its temperature. After curing of the resin, temperature of the liner is monitored and the bladder is removed only after proper cooling of the liner.
Claims9
A method of lining a branch area in a pipeline using an inflatable bladder, wherein the method comprises the steps of:
- inserting a branch liner on the inflatable bladder,
- treating the branch liner with a heat-curable resin,
- deflating the inflatable bladder,
- positioning the inflatable bladder and the branch liner into the branch area of a pipeline,
- inflating the inflatable bladder,
- running a flow of compressed air and steam through the inflatable bladder while maintaining temperature of at least 50° C. of the inflatable bladder or the branch liner until the heat-curable resin has cured,
- monitoring the temperature of the inflatable bladder or the branch liner at least until the temperature falls below 40° C.,
- deflating the inflatable bladder, and
- removing the inflatable bladder from the pipeline.
6 more elements
Dependencies are inferred from the claim text.