ASME Sec. IX Edition 2019
QW-288 Tube to tube sheet Qualification Essential Variables
QW-403 Base Metal
QW-403.31 For tubes of specified wall thickness of 0.100 in. (2.5 mm) or less, a change in tube wall thickness to increase it to more than 2T or to decrease it to less than
1/ 2 T. For tubes of specified wall thickness greater than 0.100 in. (2.5 mm), only one qualification test is required.
Understood.............
Response - Vishwas - I could not locate - QW-403.31 under Procedure Qualification Essential Variable Table - QW 288.1
Please clarify tube OD limits
QW-403.33 A change in the specified tube wall thickness or diameter greater than 10% for all diameters and wall thicknesses.
Response - Vishwas - The statement is very clear . No issue of interpretation.Pl. apply/qualify procedure considering the production welding conditions
Regards
ASME Sec. IX Edition 2019QW-288 Tube to tube sheet Qualification Essential Variables--QW-403 Base MetalQW-403.31 For tubes of specified wall thickness of 0.100 in. (2.5 mm) or less, a change in tube wall thickness to increase it to more than 2T or to decrease it to less than1/ 2 T. For tubes of specified wall thickness greater than 0.100 in. (2.5 mm), only one qualification test is required.Understood.............Please clarify tube OD limitsQW-403.33 A change in the specified tube wall thickness or diameter greater than 10% for all diameters and wall thicknesses.Regards,Pravin Nimbalkar
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