QW-288 Tube to tube sheet Qualification Essential Variables

[pravin.n...@gmail.com]

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

[Vishwas Keskar]

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

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