PAI ENGINEERING Piping Analysis Incorporated tm (PAI) was founded in 1972 by Don Hansen, M.E., P.E. as the first successful mechanical engineering company specializing in piping stress and flexibility analyses. Today, PAI ENGINEERING is a full-service mechanical and civil/structural engineering company that solves complex engineering problems at many locations around the world within the professional engineering standard-of-care.
At PAI ENGINEERING we pride ourselves on producing quality engineering solutions. Our track record serves us well, and we've experienced steady growth since opening for business in 1972. Taking care of Quality, within the professional engineering standard-of-care, is the vital guiding component of our work. The success of our business owes much to our solution systems, procedures, and how quickly we deliver these solutions to our customers.
We understand that efficiency loss and shut-downs cut deeply into the operating time of a facility. In an emergency situation, waiting days for engineering solutions means losing that many days of production.
At PAI ENGINEERING we pride ourselves on producing quality engineering solutions. Our track record serves us well, and we've experienced steady growth since opening for business in 1972. Taking care of Quality, within the professional engineering standard-of-care, is the vital guiding component of our work. The success of our business owes much to our solution systems, procedures, and how quickly we deliver these solutions to our customers.
We understand that efficiency loss and shut-downs cut deeply into the operating time of a facility. In an emergency situation, waiting days for engineering solutions means losing that many days of production.
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Then, synthesis is utilized to collect the calculated answers into an understandable report that suggests a rational organized path forward to solve an observed problem.
For example, many planned and installed system designs do not consider enough temperature/pressure differentials, especially during non-equilibrium conditions such as start-up, shut-down, rapid restart, loss of plant power, or other normal or upset conditions.
In situations like these, system elements such as lubrication systems, gas flows, and vessel nozzles, foundations, piping flanges, spring supports, rigid supports and other system elements can be overloaded above the levels originally anticipated by the designer.
For example, many planned and installed system designs do not consider enough temperature/pressure differentials, especially during non-equilibrium conditions such as start-up, shut-down, rapid restart, loss of plant power, or other normal or upset conditions.
In situations like these, system elements such as lubrication systems, gas flows, and vessel nozzles, foundations, piping flanges, spring supports, rigid supports and other system elements can be overloaded above the levels originally anticipated by the designer.
A major part of our business activity is the review of design failures that present as operating failures in the field.
Poor original design: Design conditions, whether unknown, unexpected or overlooked, were not properly considered - or they were considered but were not adequately planned for.
Often, piping systems are not correctly supported and restrained to properly distribute and control thermal displacements and to minimize sags.
Piping stresses not predicted by calculations thus occur because the system does not cycle between its original, installed location and an operating, or displaced, position.
Poor original design: Design conditions, whether unknown, unexpected or overlooked, were not properly considered - or they were considered but were not adequately planned for.
Often, piping systems are not correctly supported and restrained to properly distribute and control thermal displacements and to minimize sags.
Piping stresses not predicted by calculations thus occur because the system does not cycle between its original, installed location and an operating, or displaced, position.
For detailed analysis of piping components such as tube sheets, branch connections, nozzle connections, flanges, tees, lifting lugs or any other object, structural or otherwise, which may be under undesirably heavy loads and/or stresses, we use finite element techniques and software.
We regularly create 2D and 3D models to predict mechanical stresses due to pressure, temperature, and other applied loadings, as well as vibrational frequencies and heat transfer calculations.
We regularly create 2D and 3D models to predict mechanical stresses due to pressure, temperature, and other applied loadings, as well as vibrational frequencies and heat transfer calculations.
Computational Fluid Dynamics (CFD) is defined as the numerical simulation of fluid dynamic flows.
CFD is a discipline that solves a set of equations governing fluid flow in, over or through any geometrical configuration.
The equations can be steady or unsteady (transient), compressible or incompressible, inviscid or viscous, laminar or turbulent, single or multiphase, with or without heat transfer, with or without mass transfer, and with or without chemical reaction.
The field has been well established and is commonly applied as a design / analysis tool in many areas, such as the chemical industry.
CFD is a discipline that solves a set of equations governing fluid flow in, over or through any geometrical configuration.
The equations can be steady or unsteady (transient), compressible or incompressible, inviscid or viscous, laminar or turbulent, single or multiphase, with or without heat transfer, with or without mass transfer, and with or without chemical reaction.
The field has been well established and is commonly applied as a design / analysis tool in many areas, such as the chemical industry.
To aid in process analysis and mechanical stress-related problems, we provide heat transfer analysis.
We have the capability, using our experience together with commercial programs, to use proven analytical methods as well as the latest computational fluid dynamics and heat transfer techniques.
Time dependent heat transfer calculations are especially beneficial in determining temperature gradients through thicknesses such as tube sheets when unexplained cracks and/or leaks appear.
Most standard design codes do not consider temperature gradients that occur through the thickness of a pressure containing membrane or a tube sheet, and concurrently through its height (from top to bottom).
We have the capability, using our experience together with commercial programs, to use proven analytical methods as well as the latest computational fluid dynamics and heat transfer techniques.
Time dependent heat transfer calculations are especially beneficial in determining temperature gradients through thicknesses such as tube sheets when unexplained cracks and/or leaks appear.
Most standard design codes do not consider temperature gradients that occur through the thickness of a pressure containing membrane or a tube sheet, and concurrently through its height (from top to bottom).
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