SS316 Welding - Porosity Intermittent

[Raju Kandula]

Dear Experts,

   Our project (dosing tank) requires welding of SS316/316L plates of 5mm and 6mm Thickness, while welding of 6mm thickness with back weld, after welding on side-1 and back grinding from other end, we are observing porosity in the centre line with intermittent space during first and second phase. (attached LPT photo for reference)

   Kindly request, to advice your guidance for rectification.

Regards

Raju Kandula

[Gopalakrishnan G]

Due improper baking of electrodes 

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[Babur Khan]

Dear Mr. Raju,

Please share also welding process, after reviewing attached image my opinion is porosity due to contamination or poor cleaning. (As per picture it’s showing on edges)

Muhammad Babur Khan

Sent from my iPhone

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<WhatsApp Image 2019-05-31 at 3.42.13 PM.jpeg>

[Bgav Sampath]

I think it may be lack of root fusion could you send me welding procedure for further details. And I can help you

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[george keribo]

Dear Expert,

My opinion is that the porosity is caused due to improper cleaning before welding, It occurred on the same line. 

[Vaishakh Kc]

Dear Mr Raju,

Mention the welding process. I think the welding were done in a contaminated place.

Thanks and Regards

Vaishakh kc

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[Vinay Thattey]

DEAR RAJU:

This porosity is most likely due to contamination or moisture content. Bake the electrode . Environmental control is also necessary . Use only quality electrode. for

On Fri, 21 Jun 2019 at 13:53, Vaishakh Kc <vaish...@gmail.com> wrote:

Dear Mr Raju,

Mention the welding process. I think the welding were done in a contaminated place.

Thanks and Regards

Vaishakh kc

On 21-Jun-2019 12:13 PM, "george keribo" <bere...@gmail.com> wrote:

Dear Expert,

My opinion is that the porosity is caused due to improper cleaning before welding, It occurred on the same line. 

On Friday, May 31, 2019 at 2:01:01 PM UTC+1, Kandula Raju wrote:

Dear Experts,

   Our project (dosing tank) requires welding of SS316/316L plates of 5mm and 6mm Thickness, while welding of 6mm thickness with back weld, after welding on side-1 and back grinding from other end, we are observing porosity in the centre line with intermittent space during first and second phase. (attached LPT photo for reference)

   Kindly request, to advice your guidance for rectification.

Regards

Raju Kandula

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