Performance qual. min. thickness limitation
Performance qual. min. thickness limitation
(OP)
Is there a minimum thickness limit for qualified weld metal thickness (groove weld, ASME BPVC Sec IX)
let's say welder tested from 10 mm thk plate. What is the qualification range for welder
10mm to 20mm or 0mm to 20 mm
thanks in advance
let's say welder tested from 10 mm thk plate. What is the qualification range for welder
10mm to 20mm or 0mm to 20 mm
thanks in advance





RE: Performance qual. min. thickness limitation
minimum - is thickness of weld metal in the coupon
maximum - is 2 x the weld metal thickness above
RE: Performance qual. min. thickness limitation
RE: Performance qual. min. thickness limitation
RE: Performance qual. min. thickness limitation
if test coupon weld deposit thk. is t than max. weld deposit thk. is 2t. It is clear but no info about minimum thk.
if test coupon weld deposit is t>13 than there is no upper thk. limit. Again no info about minimum thk.
I need code referance to convince myself that test coupon weld deposit thk. is the lower limit for the welder.
Qualified procedure limits the welder but performance test says nothing about min. thk.
when i search trough internet i found this site
http://www.gowelding.com/wp/asme.htm
" The main advantages of ASME welder approval tests are:-
• There is no minimum parent thickness, only maximums, and they are applied to the deposited thickness of the weld not the parent metal thickness.
• There is no upper limit on diameter approval, only a lower limit.
• Any butt weld approval will qualify all fillet weld sizes on any parent metal thickness. {Unfortunately unlike EN287 a butt weld carried out in the flat position will not qualify a fillet weld in the conventional horizontal position, to qualify this your butt weld approval must include the horizontal position}. "
RE: Performance qual. min. thickness limitation
RE: Performance qual. min. thickness limitation
RE: Performance qual. min. thickness limitation