Criticality In Fabrication

• U shape bellow forming in two halves and welding.
• UT examination of close butt joint welding without back chipping by ILTR probe. In this welding we have face two challenges 1) During closed butt joint welding we have to control total height (welding with Control distortion). 2) No defect is accepted. These things we have achieved by doing root pass RT, then UT at 50% fill up of weld.
• We have achieved these both joints defect free and also we have maintain the required height