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Welding inspection of 110mm thick two-phase separator using Advanced NDT Inspection techniques (TOFD & PAUT)


Location:
Pakistan
Client:
Descon Engineering Pvt. Ltd
Region:
South Asia
Services:
ToFD inspection PAUT inspection
OBJECTIVE

The purpose of Advance NDT (TOFD & PAUT) inspection of 110mm thick the pressure vessel to verify the quality of welding during manufacturing and access the integrity of pressure vessel. As the vessel needs to be post-weld heat treated re-inspection was performed to ensure the effectiveness of post-weld heat treatment.

    The scope of services is divided into five parts to be conducted in parallel and iteratively and interactively, namely:

  • Prepare Procedures for TOFD & PAUT
  • Qualification and demonstration of procedures.
  • Inspection of Shell to Shell Butt welds through TOFD before PWHT
  • Inspection of Shell to Nozzle Butt welds through PAUT before PWHT
  • Analysis of scan data, prepare results and mark out repairs if any
  • Analysis of scan data, prepare results and mark out repairs if any
  • Inspection of Shell to Nozzle Butt welds through PAUT After PWHT
  • Analysis of scan data, prepare results and mark out repairs if any.
SCOPE OF WORK

Advanced NDT inspection of two-phase separator 110 mm thick:

  • Prepare Procedures for TOFD & PAUT
  • Qualification and demonstration of procedures.
  • Inspection of Shell to Shell Butt welds through TOFD before PWHT
  • Inspection of Shell to Nozzle Butt welds through PAUT before PWHT
  • Analysis of scan data, prepare results and mark out repairs if any
  • Analysis of scan data, prepare results and mark out repairs if any
  • Inspection of Shell to Nozzle Butt welds through PAUT After PWHT
  • Analysis of scan data, prepare results and mark out repairs if any.
DELIVERABLES
  • Build a scan plan for shell to shell and shell to nozzle joint.
  • Prepare procedures as per inspection scan plan
  • Preparation of calibration blocks as per applicable ASME code.
  • Preparation of demonstration block as per applicable ASME code.
  • Demonstrate and qualify procedure in presence of ASME inspector and Client (OMV)
  • Inspection of pressure vessel as per procedure before PWHT.
  • Prepare report, mark repairs and re-inspection of repair joints.
  • Inspection of pressure vessel as per procedure after PWHT.
  • All inspection data reviewed by ASNT NDT Level III.
  • Preparation of final report approval of ASNT NDT level III and verification of ASME Inspector.
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