Casing End Seal

Published: September 30, 2017 | Last updated: July 5, 2023

What Does Casing End Seal Mean?

A casing end seal is a means of closing the space between the primary pipe, also known as the carrier pipe, and the larger surrounding pipe which serves to contain it. Without some sort of seal at the end of a horizontal drilling operation, moisture and debris would be able to enter the casing and possibly corrode or damage the carrier pipe.

Casing end seals are used during the final stages of trenchless construction.


Trenchlesspedia Explains Casing End Seal

Casing is used to hold excavated boreholes in place and to allow room for one or more smaller pipes or cables to traverse it from end to end. Once the casing is installed and the carrier pipes or cables are inserted, there remains a gap between them. This gap needs to be closed.

Rodents or other creatures could infest the open space, corrosive matter could enter the casing and liquids could seep in. Using a casing end seal, installed at both ends, is the best practice for protecting the project that took so much time, effort, and money to construct.

To keep foreign material out of the opening between the casing and the carrier pipe, casing end seals of varying designs are employed. Manufacturers advertise these products as safe, clean and effective. The aim is not only to keep things out, but also to keep the carrier dry and under the proper conditions.


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