Simply to inspection head forming ASME VIII Div. 1 by using template, offset from internal boundary.
1. Visual inspection and measure access
- Prepare template with min. offset can be access gap measurement.
2. Check min. and max. gap (UG-81)
- Deviation outside of the specified shape ≤ 1 1/4% of D
- Deviation inside of specified shape ≤ 5/8% of D
3. Min. thickness by UT depth gauge