Re: [MW:31286] Ground flush on weld seam required at intersection location

[in...@pieper-qsi.nl]

Thank you for your e-mail, unfortunately I’m out of office till Monday August 10th . In the meantime I will have minimum access to my e-mail account. When you didn’t receive an response before this date I will answer your e-mail on Monday August 10th.

Best Regards,


Herman Pieper

[Dinesh]

Dear experts,

Generally, standards say that “The weld seam shall be ground flush for a distance 50 mm on all sides of the intersection”.

What is exact technical reason to do for ground flush on weld seam required at intersection location?

Thanks

[Sourav Bohrays]

its a pleasure of mine if you show refference of this theory.

which code of construction you are using?

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[in...@pieper-qsi.nl]

[GENE MATSKO]

IMHO I believe the reason for grinding this type of weld joint flush is for a good clear X-ray with no multiple beads showing on the film and no weave, Clear. Many years ago

when I worked as a welder for CBI / PDM / etc we always ground this type of joint flush because we always flat topped all the X-ray joints. The weld joints were not ground 'flush', 

they were 'flat topped', their is a difference. Flat topping a weld also gives a much clearer X-ray and it is faster than grinding joints flush. Also, I think tee joints could be called 

the 'weak link' in a weld, so to speak. I know of no code reference but that doesn't mean their isn't one.

Gene Matsko

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[George Dilintas]

ASME VIII-1 required to grind flush pressure-retaining welds in case those welds are going to be under reinforcing pads, saddles, manhole frames, lugs.

Also ASME VIII-1 in case a longitudinal weld is in an offset area, then this longitudinal weld must be flush with the parent metal

Temper bead reinforcement has also with the base metal.

Also, welds in expansion joints must be flush.

Another case are jacketed vessels made of work-hardened nickel. In case of welds subject to external pressure, they must be also flush

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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