ASME VIII Division 2 Design by Analysis
Published 9/2026
Created by ProjectEngPro Engineering and Project Management
MP4 | Video: h264, 1920x1080 | Audio: AAC, 44.1 KHz, 2 Ch
Level: Intermediate | Genre: eLearning | Language: English | Duration: 20 Lectures ( 3h 44m ) | Size: 2.1 GB
Elastic and elastic-plastic routes, stress categorisation and linearisation, local failure, buckling, fatigue
What you'll learn
Decide whether a vessel justifies Division 2, on thickness saving against analysis and fabrication cost Navigate the parts and annexes of Division 2 to find what governs a specific problem Write and review a User's Design Specification, including the cyclic service determination Choose between elastic, limit load and elastic-plastic assessment routes for a given problem Categorise primary, secondary and peak stress, and handle the junctions where it turns ambiguous Place stress classification lines and linearise through thickness without producing a false pass Apply the protection against plastic collapse and against local failure in the right sequence Carry out buckling assessment and understand imperfection sensitivity and the design factors Screen for fatigue and run an assessment using smooth bar curves or the welded joint method Recognise ratcheting and shakedown behaviour, and the services where progressive distortion governsRequirements
A working knowledge of pressure vessel design to ASME VIII Division 1 is helpful but not assumed No prior finite element experience is required - membrane, bending and peak stress are built up from the start Comfortable with basic algebra - the assessments are worked step by step, in full Helpful but not essential: access to a vessel drawing or design report from your own plant to work against No software or purchases needed - no analysis licence and no copy of the code is requiredDescription
This course contains the use of artificial intelligence.
▸ The vessel passed the analysis. The categorisation was wrong.
Division 2 buys thickness back by demanding proof. The design margin is lower, the shell is thinner, the steel bill is smaller - and in exchange the code requires an analysis, a specification and a design report that somebody has to be competent enough to produce and somebody else has to be competent enough to certify.
That trade goes wrong in predictable ways. A stress classification line drawn through a nozzle junction where linearisation was never valid. A discontinuity stress called primary because the software reported a high membrane value, and a wall that ends up thicker than Division 1 would have required. Or the reverse, and more dangerous - a genuine primary bending stress categorised as secondary, checked against the wrong limit, and passed.
The commercial consequences are just as real. A User's Design Specification that never states the cyclic duty, so the fatigue screening is done late and fails. A vendor who quoted a Division 2 vessel without pricing the full volumetric examination and the higher test pressure. A project that chose Division 2 for a vessel where the thickness saving never justified the analysis cost.
This course teaches Division 2 as a working engineer meets it: what the code is structured to do, how the Part 4 rules differ from Division 1 and why the answers diverge, and then Part 5 in full - the three assessment routes, categorisation and linearisation done properly, and the protections against local failure, buckling, fatigue and ratcheting.
▸ The analysis is the easy part. The judgement is not.
Any competent analyst can mesh a nozzle and read a stress plot. The difficulty in Division 2 is everything around the model - deciding which route to run, where to place the classification lines, what a membrane stress means at a gross structural discontinuity, and whether the number in front of you should be compared against the general primary membrane limit or the primary plus secondary range.
So the elastic route is taught alongside its known weaknesses rather than as a recipe, and the limit load and elastic-plastic routes are taught as the honest answer when categorisation stops being defensible. The load factors, the collapse criterion and the convergence behaviour are explained in terms of what they represent physically, not as inputs to a solver.
The decision to use Division 2 at all is treated commercially, because it is a commercial decision. The course sets out where the thickness saving pays for the analysis, documentation, tolerance and examination burden, and where the honest answer is that Division 1 was the right code.
Five focused sections, worked through in an afternoon.
▸ What you will master
• Decide on engineering and cost grounds whether a vessel should be built to Division 2 or Division 1
• Navigate the parts and annexes of Division 2 to find what governs a specific problem
• Write and review a User's Design Specification that will not stall the design - loads, combinations and cyclic service determination
• Understand what the Manufacturer's Design Report must contain and what an Authorised Inspector examines in it
• Apply the Part 4 design by rule route for shells, heads, openings, flanges and supports, and see why the results differ from Division 1
• Choose between elastic stress analysis, limit load analysis and elastic-plastic collapse analysis, and know the conservatism each carries
• Categorise stresses into primary, secondary and peak, and recognise the junctions where the categorisation becomes genuinely ambiguous
• Place stress classification lines defensibly and identify the linearisation errors that produce false passes
• Run the protections against local failure, buckling and ratcheting, and know which one governs and when
• Screen for fatigue and carry out an assessment using the smooth bar curves or the welded joint structural stress method
▸
Who this course is for
Pressure vessel and mechanical design engineers moving from Division 1 into Division 2 Stress and FEA analysts producing design by analysis assessments for pressure equipment Engineers writing, reviewing or approving a User's Design Specification Project and package engineers procuring Division 2 vessels and reviewing design reports Integrity and plant engineers assessing existing Division 2 equipment Graduate engineers entering pressure equipment design or stress analysis rolesHomepage
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