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Assessing integrity and realiability of multicomposite LNG transfer hoses

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Author: Weijde, G.D. van der · Putten, S. van der
Type:lecture
Date:2012
Source:Offshore Technology Conference Houston, Texas, 30 April-3 May 2012, 1
Identifier: 463582
Keywords: Marine · Buildings and Infrastructure · Built Environment · Building Engineering & Civil Engineering · SD - Structural Dynamics · TS - Technical Sciences

Abstract

Reliable transfer systems are a key element in developing floating LNG and the small scale LNG market. Multi-composite hoses may prove to be a reliable and cost effective solution for offshore, near- and on-shore applications. TNO, the Dutch contract research organization, has executed an extensive test program on the multi-composite hose of Gutteling B.V. for Ship-to-Ship (STS) LNG transfers. It has resulted in the qualification of a hose as a product in accordance to EN1474-part 2. This paper summarizes the test program. Transfer systems needs to be qualified in accordance with EN1474-part 3 which applies a risk based approach. Moreover in order, to provide data to support system qualification, a complementary test program was performed focused on the behavior under off-spec conditions. The growing range of composite LNG hose applications and the growing interest of industry raise questions on the integrity and reliability over service life. The paper reviews what factors will affect the reliability over service life. Mechanical fatigue and creep are identified as the potential critical failure mechanisms. The paper proposes an approach to modeling fatigue and creep performance to support the substantiation of the hose reliability over service life. Having commonly accepted engineering models available will enhance the further application of composite hoses in the floating LNG and small scale LNG market.