Internal Sealing of Large Diameter Pipelinesby Michael Cronin, Miller Pipeline Corp, Indianapolis, IN, USA,
Abstract: Underground piping has traditionally been repaired by making excavations at the joints and completing the repairs externally. However, with increasing labor costs, underground utility congestion, and public objects to the many street openings alternatives to this traditional method look much more attractive. The internal seal is a mechanical leak clamp, consisting of a preformed rubber seal that is installed on the inside of the pipe, sealing against the pipe wall on either side of the joint. The seal and its retaining bands are designed to fit the specific pipe diameter.
Subject Headings: Pipe sizes | Sealing | Gas pipelines | Rehabilitation | Underground structures | Excavation | North America | Georgia | United States
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