ASME SEC IX Tube to tubesheet welding procedure qualification
ASME SEC IX Tube to tubesheet welding procedure qualification
(OP)
Dear Experts,
As per QW-193.1,The mockup assembly shall essentially duplicate the tube hole configuration and the tube-to-tubesheet joint design within the limits of the essential variables of QW-288.
Question 1:Is tube hole configuration refers to tube hole pattern?
Question 2:Is tube hole pattern is essential variable in qualifiacation?
Thanks & Regards.
As per QW-193.1,The mockup assembly shall essentially duplicate the tube hole configuration and the tube-to-tubesheet joint design within the limits of the essential variables of QW-288.
Question 1:Is tube hole configuration refers to tube hole pattern?
Question 2:Is tube hole pattern is essential variable in qualifiacation?
Thanks & Regards.





RE: ASME SEC IX Tube to tubesheet welding procedure qualification
The tube hole configuration refers to the pattern (pitch) of holes on the tubesheet.
No. Don't confuse weld joint design with tube hole configuration. QW-193 clearly states..
RE: ASME SEC IX Tube to tubesheet welding procedure qualification
If tube hole configuration is not refered to weld joint design then tube hole configuration (tube hole pattern) shall be essential variable in addition to essential variables given in QW-288.
QW-193.1
The mockup assembly shall essentially duplicate the tube hole
configuration and the tube-to-tubesheet joint design within
the limits of the essential variables of QW-288.
If i used a square tube hole pattern in qualification,then can i rewrite another WPS for traingular pitch without changing other essential variables?
RE: ASME SEC IX Tube to tubesheet welding procedure qualification
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Plymouth Tube
RE: ASME SEC IX Tube to tubesheet welding procedure qualification