Re: [MW:31644] Crack in vessel due to over pressure

What are you looking for?

Crack?

Plastic deformation?

if you look for a surface microcrack (not leaking crack) then FPT is fine. However, this will take a lot of time since you have to do it in the whole surface of the vessel and you have to do it during the night.

If you worry for a plastic deformation, the best way is to do a finite element calculation in order to check if stresses over the yield point have been developed.

For an non destructive methode read this article https://www.ndt.net/article/ndtp2017/papers/Zavadil2.pdf.

All other methods are destructive. The best to do is the finite element calculation with a fine mesh in the areas of stress concentration 

Στις Τρί, 27 Οκτ 2020 στις 1:45 μ.μ., ο/η Muhammed Ibrahim PK <ibratech@gmail.com> έγραψε:

Gents, 

Is there any option to find out if the vessel is cracked because of over pressure at site by mistake. 

If we perform a tensile test across the crack area, can we get any clue if grains are already permament deformed due to over pressure? 

Or is there any other metallogaraphic method can we employ? 

Reg, 

Ibrahim

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Dr. Georgios Dilintas,

Dipl. Ing. In Aeronautic and Space Engineering

Ph.D in Mechanics of Solids - Computational Mechanics

A.I.S, A.N.I, IRCA Lead Auditor

Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis

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