RAY ALVARADO, P.E.
description
Transcript of RAY ALVARADO, P.E.
Member, Mapua Alumni AssociationAlberta Chapter
RAY ALVARADO, P.E.
PROCESS ENGINEERINGPIPING ENGINEERINGPIPELINE ENGINEERING
Presentation Breakdown
INTRODUCTION
PROCESS ENGINEERING
PIPING ENGINEERING
PIPELINE ENGINEERING
Acronyms CAE – Computer Aided Engineering CAD – Computer Aided Design HMB – Heat and Mass Balance, a Process activity CFD – Computational Fluid Dynamics FEA – Finite Element Analysis PFD – Process Flow Diagram P&ID – Piping and Instrumentation Diagram LDT – Line Designation Table ROW – Right of Way, for pipeline routing HDD – Horizontal Directional Drilling, for pipeline
crossing HVAC/R – Heating, Ventilation, Air Conditioning &
Refrigeration
PROCESS ENGINEERING
PROCESS ENGINEERING
PROCESS ENGINEERING - an early project activity for analysis of physical separation or chemical conversion. It follows project definition and early financial studies. System-wide Process simulation nowadays is computer-aided e.g. heat-and-mass balances, logical block flows, control philosophies, and equipment selection.
Important Deliverables: Process Flow Diagrams(PFDs) - schematic showing major
process equipment, main fluid flows, and basic stream characteristics (pressure, level, temp., flow).
Piping and Instrumentation Diagrams(P&IDs) - schematics with much more detail and confirmed data. Shown here are process condition limitations, major machinery specifications, minor equipment data, pipe size/details, instrumentation types, and more precise controls/automation.
Line Designation Tables (LDTs) - spreadsheet report showing details of every piping section e.g. start-end point, process variables, and other mechanical data.
PROCESS ENGINEERING
Usual entry-level positions: Chemical Process Engineer Mechanical Process Engineer Process Simulation Specialist
Minimum Skill Sets for a Junior Process Engineer: Undergraduate degree in Chemical Engineering, Mechanical
Engineering, or Chemistry-related academic programs. Basic knowledge of Fluid Statics/Dynamics,
Thermodynamics, Heat Transfer, and Chemical Unit Operations.
Supplemental knowledge in Process Equipment Design, Distillation Theory, Stoichiometry, and Chemical Reactions.
PROCESS ENGINEERINGCHEMCAD Process Simulation, Screen Images
PROCESS ENGINEERINGHeat and Mass Balance (HMB) Study, Selexol Process
PROCESS ENGINEERINGEarly concept of an oil refinery
PROCESS ENGINEERINGExample of Process Flow Diagram (PFD)
PROCESS ENGINEERINGExample of Piping & Instrumentation Diagram (P&ID)
PROCESS ENGINEERING
Process Engineering and Beyond: Next-Generation Process Simulators…..higher
processing speeds, capable of more simultaneous calculations, broader chemical database.
Multi-Physics Tools to the Mainstream……these software can now be fully integrated with existing Process Simulators.
Intelligent 2D Diagrams……embedded data on PFDs and P&IDs will pop up once a particular element is clicked or highlighted on the drawing.
PIPING ENGINEERING
PIPING ENGINEERING
Screen shots of CAEPIPE, a widely-used pipe stress analysis software, showing the Input Geometry:
Piping layoutimported from CAD 3D Model, or manually re-created
PIPING ENGINEERING
Stress Output…….watch for the “Reds”!RED areas have higher calculated stresses (needs re-work)
PIPING ENGINEERING
Animation features…...it moves!
Shows areas of excessive movement, direction of thermal growth, lift-off atsupport points, etc.
PIPING ENGINEERINGIf not analysed properly, pipes may…..
…deform and collapse
….or lift-off from supports
PIPING ENGINEERING
PIPING ENGINEERING - a Mechanical sub-discipline mainly to validate Piping Design’s pipe-fittings layout, inside enclosed industrial areas, by computational analysis or technical reasoning.
Such activities follow right after critical and major piping are completely laid out and supported.
PIPE - a closed cylindrical conduit for moving fluid (liquid, gas, solid particles) from one location to another, either by gravity or applied pressure.
FITTINGS - are transition elements for connecting pipes into an assembly or conduit network. Elbows, tees, flanges, reducers, and couplings are examples.
PIPING - logical assembly of pipes, fittings, valves, and supports.
PIPING ENGINEERING
Important Deliverables: Static & Dynamic Pipe Stress Analysis,
Reports - computer-aided, hand calculations, and “by-inspection” judgement.
Finite Element Analysis (FEA) - on equipment nozzles, header branches, and support attachments.
General Pressure Calculations – wall thickness, branch reinforcement, leak-strength testing, and hot-tap calculations.
Sizing of Engineered Restraints - for spring supports, rollers, sway braces, sway struts, seismic snubbers, etc.
Detailing of Special Pipe Supports - as required by stress analysis results or vendor special requests.
PIPING ENGINEERINGPlant Piping
3D layout of piping and pressure vessels
Offshore platform piping and equipment
PIPING ENGINEERING
Usual entry-level positions: Piping Design Engineer Pipe Stress Engineer Piping Materials Engineer
Minimum Skill Sets for a Junior Piping Engineer: Undergraduate degree in Mechanical Engineering,
Chemical Engineering, or related sub-discipline. Basic knowledge of Structural Mechanics, Strength of
Materials, Fluid Dynamics, Machine Elements Design, Materials Science, and Welding Technology.
Supplemental knowledge in Chemical Processes, Heat Transfer, Thermodynamics, and Stationary/Rotating Mechanical Equipment.
PIPING ENGINEERINGExamples of Engineered Restraints
Constant spring can
Variable spring hangers
Sway strut assembly
Seismic snubber
Sway brace assembly
PIPING ENGINEERINGExample of Custom-Ordered Supports
Support clamp withfabric lining, forvibrating lines
Rigid hanger clamp, for pre-insulated line
Pipe clamp and shoe, forpre-insulated cold line
PIPING ENGINEERING
Piping Engineering and Beyond: Full Integration of computational Analysis Software
with 3D CAD Model……seamless and bi-directional compatibility of both CAD and CAE activities, thus substantial savings of time and resources.
FEA/CFD Multi-Physics to the Mainstream……complex analysis and engineering calculations can now be simultaneously performed e.g. structural mechanics, fluid flow, vibration, and heat transfer.
Opportunities in Oilfield Frontier Areas…….more complex piping needs for fixed offshore platforms, floating FPSOs, marine tanker, and Arctic process modules.
PIPING ENGINEERINGFEA & Multi-Physics Analysis Tools
Multi-Physics Analysis(thermal + structural)of vessel
FEA of stab-inbranch
FEA ofcrimped pipe
PIPING ENGINEERINGCFD & Multi-Physics Analysis Tools
ANSYS 3D Multi-Physics (wind +thermal + struct.) around reactors
ABAQUS 2D Multi-Physics (fluid flow + thermal)
COMSOL 3D Multi-Physics (fluid flow + thermal) through elbow
PIPELINE ENGINEERING
PIPELINE ENGINEERING PIPELINE ENGINEERING - a Mechanical sub-discipline mainly to
validate Pipeline Design’s overland or seafloor routing, by computational analysis or technical reasoning, outside the fenced industrial area.
Such activities usually start after initial project development, geodetic (land) or bathymetric (ocean) surveys, and preliminary right-of-way routing.
Pipelines are generally classified into: Land Pipelines, Underground (Buried) Land Pipelines, Aboveground Underwater PipelinesImportant Deliverables/Involvement: Hydraulic Analysis, Steady-State and/or Transient (Surge) Pipeline Stress Analysis HDD (Horizontal Directional Drilling) and Crossing Studies Lateral and Upheaval Buckling Analysis
PIPELINE ENGINEERING
Usual entry-level positions: Pipeline Design Engineer Pipeline Stress Engineer Pipeline Hydraulics Engineer
Minimum Skill Sets for a Junior Pipeline Engineer: Undergraduate degree in Mechanical or Civil Engineering. Basic knowledge of Engineering Surveying, Structural
Mechanics, Strength of Materials, Fluid Dynamics, Machine Elements Design, Materials Science, and Welding Technology.
Supplemental knowledge of Heat Transfer, Thermodynamics, and Stationary-Rotating Mechanical Equipment.
PIPELINE ENGINEERINGLand Pipeline Routing
Natural gas pipeline right-of-way Routing Study taken from terrain survey
Plan-and-Profile Drawing,with data from routing studyand terrain survey
PIPELINE ENGINEERINGPipeline Analysis
River crossing…..suspension bridge and cable stay details for Trans-Alaska Pipeline
Seismic analysis….and mitigation measures for Trans-Alaska Pipeline while crossing the Denali fault line
PIPELINE ENGINEERINGEngineered Pipeline Supports
Detail of H-Supportand side bumpers
Trans-Alaska Pipeline ammonia-filled H-Support, with cooling fins, pile driven through permafrost
PIPELINE ENGINEERINGUnderwater Pipelines
Underwater gas pipelineon uneven seafloor, with free-spanned sections
Underwater pipelines, for oil-and-gas production gathering
PIPELINE ENGINEERINGSeafloor Routing Study of underwater oil pipeline
PIPELINE ENGINEERINGPipeline Stability Analysis & FEA
Overstress at seabed touchdownarea, due to excessive bendingfrom pipelay surface vessel
PIPELINE ENGINEERING
Pipeline Engineering and Beyond: Integration of Pipeline Surveys with Routing
Selection……in intelligent 3D format, these related activities will be fully synchronized for accuracy and cost savings.
Pipeline 3D Models Imported Into Multi-Physics Simulation…..like stress analysis, hydraulic surge, flow assurance, global buckling, or ice gouging hazards.
Deeper, Colder……in search for oil and gas, the industry is pushing the limits of pipeline technology beyond the world’s Continental Shelf and in harsher Arctic environments.
PIPELINE ENGINEERINGArctic Pipelines, Ice Gouge Hazard Analysis & FEA
Burial depth is critical, to prevent pipeline damage
Gouged seafloor imagingBerg gouging
Sea ice gouging
PIPELINE ENGINEERINGCFD & Multi-Physics Analysis Tools (ANSYS)
3D CFD (fluid flow +thermal) at junction
3D CFD (fluid flow +structural) through valve
3D CFD (fluid flowonly) through blades
Trivia Question:
What’s the difference between “PIPING” and “PIPELINES”?
Other than spelling, of course.
Answers:
PIPING Inside the enclosed industrial area or fenced plot limits. Physical configuration can be very complex. Mostly of short length, specified in feet or meters. Uses lower grade steel, thus pipe wall is thicker. Can operate at very high temperatures and pressures, or
conversely at cryogenic temperatures and partial vacuum.PIPELINES Outside the enclosed industrial area or fenced plot limits. Physical configuration is usually simple, from point A to point B. Almost always very long, specified in miles or kilometres. Uses higher grade steel, thus pipe wall is thinner. Usually operates at moderate temperatures and high
pressures.