Pressure vessel, ASME VIII-1, UW-16, Nozzle attachment
Pressure vessel, ASME VIII-1, UW-16, Nozzle attachment
(OP)
Hello everyone!
I have a nozzle which is welded through shell and jacket plates. We are having a trouble making a fillet weld on the outside surface of a shell, because there is practically no access.
Is there any type of weld that allows making only full penetration groove weld without making a fillet weld on the backside?
I have a nozzle which is welded through shell and jacket plates. We are having a trouble making a fillet weld on the outside surface of a shell, because there is practically no access.
Is there any type of weld that allows making only full penetration groove weld without making a fillet weld on the backside?





RE: Pressure vessel, ASME VIII-1, UW-16, Nozzle attachment
Is it an option to project the nozzle inside the vessel?
Regards,
Mike
RE: Pressure vessel, ASME VIII-1, UW-16, Nozzle attachment
Yes, the nozzle is projected inside the vessel. Pressure vessel of rectangular cross section externally reinforced by u-beams. U-Beams form a jacket around an inner vessel.
As I understand, if there is no fillet weld on the nozzle then it is not in accordance with sketches in figure UW-16.1. Should then strength calculation for the groove weld be performed UW-15? Or there any other rule in a Code, which allows making only inside full penetration groove weld ?
Thanks!
Sorry my bad English :)
RE: Pressure vessel, ASME VIII-1, UW-16, Nozzle attachment
If the nozzle is projected inside the vessel (your sketch does not show it as such) why not add the fillet to the inside?
Regards,
Mike
RE: Pressure vessel, ASME VIII-1, UW-16, Nozzle attachment
Sorry for misleading you. The nozzle does not protrudes inside the vessel. It is flushed with the
vessel ID as it described on a attached sketch.
So, if fillet weld is not required, should then the dimension tw (Fig. UW-16.1 sketches (t) and (u)) of a weld be not less than tn nor less than 0.25 in as it reads in UW-16(e)(2) ?
RE: Pressure vessel, ASME VIII-1, UW-16, Nozzle attachment
If full penetration, I would say the applicable sketch is (d), omitting the fillet.
Regards,
Mike