Weld surface finish / ASME B31.3 item 341.3.2 / Severe Cyclic Service
Weld surface finish / ASME B31.3 item 341.3.2 / Severe Cyclic Service
(OP)
According to ASME B31.3 table 341.3.1, severe cyclic service piping welds have surface finish criteria (roughness) of 12,5um Ra.
Somebody experienced measuring this roughness over weld bead, once there´s a numerical criteria?
Somebody knows the influence of roughness in fatigue life?
What if i don´t mind this criteria?
In my opinion the weld shape (weld toe) is much more critical than roughness to fatigue life. I measured weld roughness over weld beads made by FCAW, SMAW and GTAW, and found roughness little bit over the specified 12,5um Ra. (up to 18,0um Ra)
I´m talking about process piping in oil&gas industrie.
I´m digging the web looking for answers, I would appreciate a little help here!
thanks
Somebody experienced measuring this roughness over weld bead, once there´s a numerical criteria?
Somebody knows the influence of roughness in fatigue life?
What if i don´t mind this criteria?
In my opinion the weld shape (weld toe) is much more critical than roughness to fatigue life. I measured weld roughness over weld beads made by FCAW, SMAW and GTAW, and found roughness little bit over the specified 12,5um Ra. (up to 18,0um Ra)
I´m talking about process piping in oil&gas industrie.
I´m digging the web looking for answers, I would appreciate a little help here!
thanks





RE: Weld surface finish / ASME B31.3 item 341.3.2 / Severe Cyclic Service
RE: Weld surface finish / ASME B31.3 item 341.3.2 / Severe Cyclic Service
thanks.