If you are using an F3/F4 procedure, this herring porosity could be a slag trap caused by sidewall undercut from a cellulosic root covered by filler metal.
If a cellulosic root is deposited, the sidewall undercut should be removed by grinding or if the WPS allows, it should be remelted by a cellulosic "hot pass".
Please post if you have other information or additional questions.
Regards,
Darcy
Smaw
On 1 Feb 2010 13:06, "Darcy Morin" <damorin@shaw.ca> wrote:--
Which welding processes are you using?
On 2010-01-31, at 21:47, Jimmy Nielsen <nielsen.jimmy@gmail.com> wrote:
> Hi All
>
> On some RT...
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