welder thichness limits... 1

[emrekop]

hii everyone...according to ASME , can branch connections (stub-in or stub on) be considered as fillet welds or still thickness limits for welders should be applied on it.thanks...

 

[metengr]

emrekop;
Why are you asking this type of question? Did your welders only qualify for fillet welds? Normally, welders are qualified using groove welds with test positions in QW-461.9 because groove welds qualify for fillet welds of all thicknesses and dimensions in accordance with QW-303.1.

 

[emrekop]

why I am asking is just because a welder qualified with 6" sch40 groove in position 6G can weld all thicknesses of fillet but if branch connections are regarded as groove then above welder cannot weld beyond his thickness limit...

 

[emrekop]

additionally , B31.3 is our governing code and acc. to this code all the applicable branch connections (made from pipe unreinforced ones) are full penetration ...

 

[metengr]

B31.3 is our governing code and acc. to this code all the applicable branch connections (made from pipe unreinforced ones) are full penetration

You have answered your own question!

 

[weldtek]

emrekop,
A lot of fabricators standardize on test plates that are .5" thick so that their welder's qualified thickness is only limited by the WPS. In our case we use a 6" sch 120.