Hydrogen Blistering Damage (HBD)
API 579-1/ASME FFS-1 Part 7
Assessment of HIC and blister damage in pressure vessels
Unified Assessment Wizard
Choose your damage type (HIC or Blister) and assessment level in a single guided flow. Currently supports cylindrical shells at Level 1 and Level 2.
HIC: Hydrogen-Induced Cracking
Stepwise/parallel cracks driven by atomic hydrogen accumulating at internal defects.
- Level 1 screening (Part 7.4.2.1)
- Level 2 RSF (Part 7.4.3)
Blister: Hydrogen Blistering
Bulging caused by molecular hydrogen accumulation; may be vented or crown-cracked.
- Level 1 screening (Part 7.4.2.3)
- Level 2 RSF (Part 7.4.3)