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Title: Grouted Teetm - For Hot Tap Connections
Author: D.Q. Vu
Source: American Gas Association 2001
Year Published: 2001
Abstract: Pipeline intervention scenarios such as repair, valve bypass/replacement, removal of blockages and branch connections are performed frequently on both onshore and subsea pipelines. Hot tapping presents the attraction of being able to intervene into an existing pipeline under pressure at any location and at will. Since 1997, Advantica has been developing the Grouted TeeTM connection technique for both onshore and subsea applications. Hot tapping process using the Grouted TeeTM Connection is simple and surface preparation is less critical compared to current methods (i.e. welding or bolt-on-mechanical fittings). Grouted TeeTM Connection does not require any welding (i.e. hot works) and offers zero disruption to production during installation making it suitable for diverless intervention for subsea pipelines. . The savings in eliminating any lost production alone can be millions of pounds per day. This paper describes the development of the onshore Grouted TeeTM in detail. It also illustrates the installation methodology for subsea pipelines, making diverless pipeline intervention in deepwater a reality.

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