Challenges in a Multidisciplinary Approach for Explosion Design for Floating Facilities
Floating-liquefied-natural-gas (FLNG) units have been under development for decades. They are now becoming a reality, combining the design and installation of liquefied-natural-gas (LNG) units with a traditional floating production, storage, and offloading facility. Because FLNG facilities handle large flammable-gas quantities in a relatively small and congested environment compared with onshore LNG plants, the explosion risk is expected to be higher than that for some other offshore floating facilities. As a consequence, the intensity of the resulting blast loads on the unit can be more severe, even if the likelihood of explosion in the de- sign is considered to be low through frequency analysis.
Even if prevention and mitigation measures are implemented to reduce risk to as low as reasonably practicable, safety-critical ele- ments (SCEs) such as main equipment and structures should be designed to withstand the blast event. Because the explosion events are very specific (high intensity and short duration), the common design rules and tools should be updated to take into account this accidental event. In addition, the associated performance criteria for SCEs should be modified. Finally, the entire design should comply with safety objectives (personnel protection, prevention of escalation).
This paper focuses on the philosophy of design against a blast event on floating facilities in general, but with a particular focus on FLNG units. It will review the critical functions of the unit that must be maintained during emergency evacuation to protect people and identify the key parameters governing the explosion strength on floating facilities. It will show that the derivation of ef- fective explosion loads on structures and equipment on the basis of computational-fluid-dynamics simulations is not straightforward and requires expertise in explosion modeling and explosion response. The paper will also show how all the engineering disciplines in Technip individually apply these blast loads in their designs through nonlinear-finite-element analysis. Finally, the paper will highlight the interface between the engineering disciplines and how a consistent demonstration through the design can be achieved to fulfill the safety goals, taking engineering further.
Financing FLNG Facilities—What Lies Ahead?
Although the FLNG concept has been around for decades, only three units are in the water and operational or under commissioning as of 2018. As the mitigation of technological risks is demonstrated, commercial risks become the focal point and the challenge to financing the capital-intensive projects.
First Cargo Confirmed for Yamal LNG Plant
TechnipFMC confirms the December shipment of LNG from its new facility in northern Russia, one of the largest integrated LNG projects in the world.
McDermott, BHGE Appointed for Joint FEED Studies on Tortue/Ahmeyim Field
The two companies will collaborate to define the technology and equipment scope for an initial four-well development phase for BP’s major West African offshore gas project.
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20 April 2018