TEE CONNECTION TO A PIPELINE

摘要

A method is provided for securing a branch assembly (1) to a "live" pipeline (6). An upper part (2) of the assembly incorporating the branch (13) is positioned on the pipeline over a containme nt ring (16) located on the pipeline and within which there is an annular seal (17) surrounding an area (6a) from which the branch is to extend. A lower part (3) of the assembly is positioned on the pipeline beneath the upper part and the two parts are secured togethe r so that the seal is compressed and an annular space (19) is left between the two parts and the external surface of the pipeline. Grou t is injected into the annular space (19) and cures to bond the two parts forming the branch assembly in position on the pipeline. The u se of grout avoids having to use welding techniques on a "live" pipeline. A coupon can be cut out of the pipeline, via the access through the branch.