Special Services for Equipment design

SPECIAL SERVICES FOR EQUIPMENT DESIGN Early built-in solutions to avoid costly problems later on Context: Vibration affects the performance, reliability and integrity of onshore and offshore installations. VIBRATEC handles vibration issues at both Front End Engineering Design (FEED) and detailed design stages to avoid costly problems on-site. Missile Computation on Turbines Non-linear Computations • Verification of the unbalance due to blade off • Verification of the casing containment for blade and shaft end rupture and for catastrophic rotor failure Transient Dynamic Event Computation Lateral and Torsional Vibration Analysis Sealing System Verification A transient event is for example an impulse load such as: • Blast • Seism For some events, large deflections and permanent deformations are allowed. Therefore, non-linear geometric and material behavior should be accounted for in the response assessment: • Blast • Lifting lugs • Lifting trunions • Pressure vessels These analyses concern gas turbines, centrifugal compressors and induction motors as per API 684 standard. • Critical speed • Campbell diagram • Unbalance response • Stability analysis • Allowable vs maximum sealing gap • Verification of seal behavior against transient process cases (slow-roll, ratcheting) Equipment Reference Oil & Gas Oil & Gas Technical Reference Detailed Casing Computations Heat Exchanger Studies References Heat exchangers are very complex structures and their lifecycle is continuously challenged by vibrations. • Use of Heat Exchanger Institute standards • Critical velocity computation • Control of vortices and flow-induced vibrations Compressor Piping Flexibility and Dynamic Computation Dynamic Reciprocating Equipment Studies Reciprocating machines are some of the most common sources of vibration issues. Based on its experience, VIBRATEC can anticipate and solve these problems. • Vibration level prediction and optimization • Finite element analysis • Pulsation analysis as per API 618 and API 674 standards The goal is to prevent premature failure of piping and piping components and ensure that pipe stresses are kept within allowable limits. • Thermal stress • NEMA at flange computation • Modal basis Successful problem anticipation mitigates risk. • Rubbing • Ratcheting • Casing deformation • Thermal analysis • NEMA forces Rotor Fracture Analysis Fractured rotors have provoked several accidents and many casualties. It is therefore important to perform fracture-mechanic-based analyses: • Mechanical safety analysis • Flaw map • Thermal-stress distribution • Permissible flaw size • Crack growth after a given number of start-ups oil.gas-assistant@vibratec.fr www.vibratec.fr Oil_And_Gas_Equip spec.A Diapositive numéro 1 Diapositive numéro 2