Sjöblom (2004) gives an overview of coupling types with various sealing strategies: gasketed joints, o rings, compression packing, press couplings, etc. Furthermore, certain plastics materials, such as cross-linked PEX, are unsuitable for welding and some kind of mechanical coupling is therefore necessary. Compared to welded or soldered connections, benefits include quicker and thus less expensive installation work. In flexible pipe systems, couplings are commonly used for joining pipes and other service components. Nilsson, in Advanced District Heating and Cooling (DHC) Systems, 2016 9.5.3 Couplings for flexible pipes Then the inspection and monitoring technologies are discussed as well as the testing and analysis methods. Against these failures, the integrity management strategies in every stage of the flexible pipe industry are introduced. The failure modes and related mechanisms are summarized. This Chapter mainly deals with the risk assessment and integrity management of flexible pipes.
Flexible pipe integrity management programs with definite methodologies have been established in the industry according to the related JIPs. The composite construction of unbonded flexible pipes makes the failure modes complex and the way to mitigate the risks of failures becomes an important aspect in the system selection. Yong Bai, Qiang Bai, in Subsea Pipeline Integrity and Risk Management, 2014 Abstractįlexible pipe integrity management aims at managing the risks of failures and keeping the pipes in normal operating condition during the service life through risk-consistent inspection, monitoring, repairing and maintenance strategy.
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