Method for lining pipes in pipelines
AssigneeHakko Corporation
InventorMotoyuki Koga
Life of this patent
Estimating the term…
Abstract
A method for lining pipes in a town gas underground pipeline. The method is characterized in that carrier air is flown together with plastics mist passing through a route comprising a branch line for distributing the gas to consumers, so that the pipeline and branch pipe are lined with the plastics.
Claims13
A method for lining cooperating pipes of an underground pipeline which pipeline includes a plurality of branch pipes each having an end which opens to the atmosphere, comprising the steps of:
- flowing carrier air in said cooperating pipes and through at least one of said branch pipes and said pipeline;
- supplying plastics mist in said cooperating pipes via said carrier air;
- discharging said carrier air together with said plastics mist out of said cooperating pipes;
- and
- recovering said plastics mist into a plastics mist recovery tank.
A method for lining cooperating pipes of an underground pipeline which pipeline includes a plurality of branch pipes each having an end which opens to the atmosphere, comprising:
- flowing carrier air in said cooperating pipes and through at least one of said branch pipes and said pipeline;
- supplying abrasive grit in said cooperating pipes via said carrier air;
- discharging said carrier air together with said abrasive grit out of said cooperating pipes;
- recovering said abrasive grit into a grit recovery tank;
- supplying plastics mist in said cooperating pipes via said carrier air;
- discharging said carrier air together with said plastics mist out of said cooperating pipes;
- and
- recovering said plastics mist into a plastics mist recovery tank.
Dependencies are inferred from the claim text.