www.QuestIntegrity.com I Phone: +64 (0)4 978 6630 I Fax: +64 (0)4 978 9930 I Sales@QuestIntegrity.com Asset Longevity / Plant & Pipeline Performance

F-002-PV

Pressure Vessels

Simulation of a fatigue crack propagating in the shell wall of a cylindrical pressure vessel

Examples of assessments performed in the past include:n Determine stability of a detected crack and its effect on

structural integrityn Assess remaining useful life (number of cycles or time in

service to failure) using crack growth simulationn Recommend areas for inspections based on Finite

Element Analysis (FEA)n Determine fitness-for-service of a vessel with localized

thinning due to corrosionn Rapidly evaluate, compare, and refine repair design

concepts using virtual prototyping, resulting in efficient design iterations

n Avoid expensive hydro testing and strain gauging by certifying vessels using FEA per ASME, Section VIII, Division 2, or storage tanks per API 653 Tank Inspection, Repair, Alteration, and Reconstruction

n Determine root causes of vessel failuresn Determine inspection interval and measurement

resolutions to ensure cracks do not grow to critical sizes between inspection cycles

n Predict fatigue and wear with vibration modelingn Determine wind and seismic resistance of vessel supportsn Calculate remaining life of dented and bulged pipesn Incorporate statistics for conservatively safe designs

Many of these analyses aided in the design of new vessels.

Structural Integrity Assessments of In-Service VesselsOur assessments support remediation decisions about problematic in-service vessels (continue operation without modifications, monitor, re-rate, repair or replace). Costly repairs and down-time are often deemed necessary based on rudimentary and overly-conservative analyses. Our accurate assessments minimize excess conservatism and often demonstrate fitness-for-service without repair.

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Wellington, New Zealand +64 4 978 6630

We are a global leader in the development and delivery of asset integrity and reliability management services and solutions for our clients. Our solutions consist of technology-enabled, advanced inspection and engineering assessment services and products that help companies in the refining and chemical, pipeline, syngas and power industries reduce operational and safety risks, improve operational planning and increase profitability. Quest Integrity Group, a Team Industrial Services company, is built on a foundation of leading edge science and technology that has innovated and shaped industries for over forty years.

Stresses at vessel saddle support

ApplicationsWe have analyzed pressure vessels and other critical assets for clients across a wide range of industries, although a majority of our clients are in the energy sector. Applications include:n Pressure vessels, piping, storage tanks, furnace

components and coke drums in refineries, petro-chemical plants, chemical plants and power plants

n Steam and gas turbines for power generation and jet engines

n Pipelinesn Manufacturing machineryn Offshore platforms, risers and drilling equipmentn Transportation vehicles

Analysis CapabilitiesOur team has extensive, practical experience with fitness-for-service assessments of complex pressure vessels. The assessments are supported by our expertise in structural mechanics, fracture mechanics and FEA. Our proprietary software packages for crack simulation (FEACrackTM) and fitness-for-service (SignalTM Fitness-For-Service) expedite higher level fitness-for-service assessments. Our analysis capabilities include: n Stress analyses of vessels with complex geometriesn Fracture analyses including 3D crack meshing and

automatic mesh generationn High cycle fatigue, low cycle fatigue (ratcheting) and

creep crack growth analysesn Modal analyses, including random vibration analysesn Multi-body contact, friction and impact simulationsn Determination of weld residual stresses, per

API 579/ASME FFS-1 or using FEA simulations of welding processes

n Coupled heat transfer-mechanical simulations with temperature dependent material properties

n Nonlinear material behavior including plasticity, creep and martensitic phase transformations

n Coupled mass transport (diffusion) simulationsn Computational fluid dynamics (CFD) simulations to

calculate temperatures and pressuresn Metallurgical examinations and analyses

Our analyses can be performed in compliance with the following standards:n API 579/ASME FFS-1: American Petroleum Institute

and the American Society of Mechanical Engineers, Fitness-for-Service

n ASME: American Society of Mechanical Engineers, Boiler and Pressure Vessel Code, Section VIII Division 2, Design by Analysis Requirements

n BS 7910: British Standard, Guide to Methods for Assessing the Acceptability of Flaws in Metallic Structures

Pressure Vessels