Oil & Gas - LNG

NOISE & VIBRATION CONTROL IN FLOATING LNG (FLNG) INSTALLATIONS Vibratec has a strong experience in the gas sector, from production to transportation through storage and liquefaction. Vibratec already has solid references in the booming FLNG market. Design optimization Control of the structure design & the rotating equipment mechanical design are the key points of a safe installation from a dynamic point of view. This control is performed thanks to expert review in early phases and thanks to Finite Element Modelling later on. Noise impact shall be studied on the whole installation. The aim is to assess and control human exposure to noise. If necessary, mitigation actions are tested on the computation models and proposed to the engineering team. Noise Studies Vibration Studies FLNG Project References PETRONAS PFLNG 1 Noise & Vibration studies during EPC SAIPEM ABADI FLNG Noise & Vibration studies during FEED TECHNIP PRELUDE FLNG Expert third party PETROBRAS FLNG Vibration control philosophy definition FLNG FEED SBM Prelude Turret Noise study Technical Expertise Oil & Gas Control from the FEED Stage The first Noise & Vibration studies shall be performed as early as the FEED stage. The sooner Vibratec is involved in the project, the easier the design optimization process will be. NOISE & VIBRATION CONTROL IN GAS TRANSPORTATION & LNG FACILITIES Vibratec has a strong experience in the gas sector, from production to transportation through storage and liquefaction. Vibratec handles noise and vibration issues at the design stage and also performs on-site control and troubleshooting. Noise study The noise impact of any onshore facility has to be considered early in the project to reduce the environmental impact. The most common strategy is to proceed in three steps: • On-site measurements in the initial configuration, • Noise study of the new facilities to predict the noise levels and propose mitigation actions to reduce the impact on the neighbourhood, • Control measurements at installation start-up. Vibration damages can affect rotating or reciprocating equipment, surrounding structures, pipes, buildings. They can be due to either a resonance or high excitation forces. Common strategy used to identify the cause(s) of the vibrations is to: • Characterize the machine’s dynamic behavior in operating conditions, • Perform a piping vibration survey to identify the critical areas in operating conditions, • Perform an experimental modal analysis, equipment stopped, to determine if resonances are excited during normal running. Risk assessment & diagnosis Mitigation actions can be based on experience or computations by tuning a Finite Element Model with experimental results. Design Assistance Vibration study The design of the rotating equipment packages & supporting structures must be controlled to avoid any risk of resonance between the “natural” and “excitation” frequencies. This concerns the machine base plate, the modules, the pipe rack and the concrete foundations. These analyses are based on Finite Element Computations. Gas Project References Gas transportation GRT Gaz Vibration troubleshooting TIGF Noise & Vibration diagnoses Entrepose Noise study Tecnicas Reunidas Noise study Shell LNG carrier Noise diagnosis LNG Elengy Troubleshooting on LNG terminal Yemen LNG Vibration trouble shooting on Bal’Haf plant SAIPEM Vibration analysis on PEARL C8 SDAG FEED Shtokman oil.gas-assistant@vibratec.fr www.vibratec.fr Oil_And_Gas_LNG.D In addition to studies at the design stage, an efficient way to anticipate issues is to perform controls during FAT &/or commissioning The controls can include pumps, compressors, generators, fans, pipes, valves and supporting structures. Diapositive numéro 1 Diapositive numéro 2