December 2017


LinerBridge® – A polymer pipeline connector to eliminate CRA welding in polymer lined pipeline fabrication

51% of all pipeline failures are a result of internal corrosion, with 7 years the typical life expectancy of an unlined water injection pipeline according to a JIP completed by North Sea operators.

Swagelining has developed the world’s first polymer pipeline connector for fabrication of polymer lined pipelines. The LinerBridge® connector, as part of Swagelining’s integrated lining system, is qualified for a 50 year design life, offering pipeline owners substantially greater certainty in long term pipeline ownership, with the most cost effective life cycle cost.

The LinerBridge® connector, which can only be supplied by Swagelining, removes the need for costly CRA welding from corrosion resistant pipelines. LinerBridge® offers a step-change in the application of polymer lines, and is suitable for onshore and offshore use. When used in reel-lay, the LinerBridge® connector enables EPCI cost reductions of 35% over a CRA mechanically lined pipeline and an almost comparable EPCI cost to an unlined carbon steel pipeline with a corrosion allowance.

LinerBridge® uses robust and proven electrofusion welding technology adapted from the onshore utilities gas industry to provide a continuous polymer corrosion barrier from pipeline end to end. The carbon steel pipeline can then be safely welded over the top of the polymer connector.

Qualification work has been completed to develop the LinerBridge® to TRL 5 (Technology Readiness Level five) in-line with DNV and API guidelines.

This robust qualification work covers a connector size range of 8”-16” and includes hydrostatic pressure testing up to 380 bar and cyclic pressure testing of 1,000 cycles from 0-250 bar. To achieve qualified status for a 50 year design life, accelerated age testing has been successfully completed with a major Norwegian operator.

LinerBridge® have been installed into a pipeline lead string and reeled onto the Seven Oceans pipelay vessel and then subjected to successful full destructive testing. Major operators including Total, Shell and Statoil have been involved in the extensive qualification programme.