cjohnso0
Mechanical
- Jul 17, 2001
- 20
Greetings everyone,
I am looking for help with an FPI-related discussion I am having with our local Level III. I have the requirement to FPI a certain part using a 1D2 class penetrant (Medium Sensitivity, Post Emulsified). Unfortunately, we are unable to process this component with this penetrant. I would like to change the requirement to 1A2 or 1A3 class penetrant, which is water washable, Medium or High.
According to my Level III, this is not possible because all P/E penetrants are of a higher sensitivity than the W/W. I.E. he feels that the 1D2 penetrant is higher sensitivity than a 1A3 or 1A4. I am not convinced, as he has no data to back this up.
Is anyone familiar with penetrant classification, and their sensitivities. Any data backing up either argument is good. For the record, the OEM will allow our local Level III to change this requirement, but I need to convince him it is a sound change.
Thanks in advance,
Chris
I am looking for help with an FPI-related discussion I am having with our local Level III. I have the requirement to FPI a certain part using a 1D2 class penetrant (Medium Sensitivity, Post Emulsified). Unfortunately, we are unable to process this component with this penetrant. I would like to change the requirement to 1A2 or 1A3 class penetrant, which is water washable, Medium or High.
According to my Level III, this is not possible because all P/E penetrants are of a higher sensitivity than the W/W. I.E. he feels that the 1D2 penetrant is higher sensitivity than a 1A3 or 1A4. I am not convinced, as he has no data to back this up.
Is anyone familiar with penetrant classification, and their sensitivities. Any data backing up either argument is good. For the record, the OEM will allow our local Level III to change this requirement, but I need to convince him it is a sound change.
Thanks in advance,
Chris