Boiler Header Assessments
Boiler headers — prey to girth weld cracking, ligament cracking, stub tube weld cracking, and other issues — deserve careful consideration. Structural Integrity Associates, Inc. (SI) provides comprehensive header assessments to assist clients with difficult run/repair/replace decisions. Services include review of operation and maintenance data, complete header inspections, analytical life assessment, crack growth prediction, on-line monitoring of damage progression and crack growth, weld repair, and re-design engineering. Some of SI's impressive boiler header assessment specialties: advanced linear phased-array and focused phased-array inspections of header girth welds, including welds with mid-wall-initiated creep damage, and welds with tube bore holes; assessment of header ligament cracking using specialized focused ultrasonic techniques, finite-element stress analysis and creep-fatigue crack growth calculations, and on-line monitoring; and magnetic particle and advanced ultrasonic examination of tube stub-to-header welds for OD and sub-surface cracking.
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