Observed crack after root bend of SA312 Type 316L

[kunalen...@gmail.com]

Dear Experts

I had faced a problem while doing the Root bend testing for PQR, Observed crack (image attached) after root bending, having such crack inase of SS316L pipe (3/4"xSCH160) is not common. Parameter kept during welding is as below:

Ampere- 90-110

Volt- 10-12

Shielding-10-12 LPM

Interpass-175 Deg C

Please share with your experience, what would be the reasons behind this failure?

[José Juan Jiménez Alejandro]

fyi

Libre de virus. www.avast.com

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Ing. José Juan Jiménez Alejandro

Independent Consultant in Parts

and Pressure Equipment

SSI-TPI

Móvil +52 1 812 352 4606

Skype: jjjimeneza