AWeld1
Computer
- Jul 21, 2014
- 22
Good Day!
I am working in a Power Plant and as we have conducted an in-service Borescope inspection in the tube to header connection, some discontinuity was observed. The HRSG was operating for more than 2 years now.
As per our clients report based on the photos taken during the inspection, they have mentioned that there were microfissure on the root weld measuring 0.2mm
The materials are P91, P22, P11
I would like to ask:
1) What causes microfissure?
2) Which reference can I read in order to understand microfissure?
3) How do we measure microfissure and what method or procedure?
Thank you very much.
I am working in a Power Plant and as we have conducted an in-service Borescope inspection in the tube to header connection, some discontinuity was observed. The HRSG was operating for more than 2 years now.
As per our clients report based on the photos taken during the inspection, they have mentioned that there were microfissure on the root weld measuring 0.2mm
The materials are P91, P22, P11
I would like to ask:
1) What causes microfissure?
2) Which reference can I read in order to understand microfissure?
3) How do we measure microfissure and what method or procedure?
Thank you very much.