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[MW:32197] QW-288 Tube to tube sheet Qualification Essential Variables

By Materials & Welding
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.............

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.

Regards,
Pravin Nimbalkar




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