COMPRESSOR BOTTLE CRACKS AND NONDESTRUCTIVE EXAMINATIONS

1
COMPRESSOR BOTTLE CRACKS AND NON-DESTRUCTIVE
EXAMINATIONS
Cracks Originate Along the Toe of Fillet Welds.
They Have Ratchet Marks and Beachmarks.
2
The Crack Tips Are Straight and Transgranular
Characteristic of Fatigue.
3
How Should The Bottles be Inspected?

• Inspect with creeping wave and shear wave
  ultrasound
• Fillet welds joining internals to the vessel
  shell and heads,
• The heads and shell external fillet welds
  associated with nozzles,
• All re-pad to shell fillets welds, and
• The re-pad to nozzle joint on the re-pad side and
  on the nozzle side.
• Perform magnetic particle inspections of external
  fillet welds