Re: [MW:26090] PQR for dissimilar material with dissimilar thickness.

the qualification on a 13 mm thick sample with more than 3 layers applies to welder performance and not to PQR.

If the weld is a branch weld, then you have no a dissimilar thickness issue.

You should have a dissimilar thickness situation in case of a butt weld

2017-02-15 11:42 GMT+02:00 VISHNUDAS MAVUNKASHERY <36vishnudas@gmail.com>:

i thnk above 13 mm thickness..it will get qualified for unlimited thickness

On Wed, Feb 15, 2017 at 9:04 AM, Anandh Kumar <anandh23@gmail.com> wrote:

Dear experts,
I seek ur advice on the subject. The details as follows,
We are supposed to do a nozzle extension internally on a vessel of 57 mm thick shell (shell material A516 gr. 70) which requires impact testing. The pipe used is 316L of thickness 3.76 mm. How many PQRs will be required to cover the thickness range with all pthee essential variables as identical.

Regards
Anandh kumar

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VISHNUDAS MURALI MAVUNKASHERY

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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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