Guidelines on fossil boiler field welding. Final report

Technical Report · Fri Jan 01 04:00:00 EST 1993

OSTI ID:10134618

Stephenson, G G ^[1]

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1. Ontario Hydro, Toronto, ON (Canada)

Welding is a key maintenance activity in the repair and replacement of critical boiler pressure-part components. Unless trained welders use qualified procedures and documented practices, significant delays to outages may result from defective weld repairs, and future weld-related failures may cause costly outages. To address these issues, a comprehensive guideline on field-welding practices for fossil-fired boilers has been developed. It can assist utilities in establishing in-house welding programs. Welding practices used by utilities, boiler manufacturers, and repair organizations were critically reviewed and utilized in the preparation of a step-by-step guideline for repairs to, and replacement, of boiler tubes, headers, and drums. A set of Road Maps, and their accompanying written descriptions, guide the user through each step in every phase of the complete weld repair process. Additionally, the guideline discusses in detail: weld repair management, welder performance qualification and training, repair decision evaluation, defect removal and joint preparation, repair methods for thin and thick sections, welding procedure variables, materials and specifications, failure and root-cause analysis, inspection, and testing.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States); Ontario Hydro, Toronto, ON (Canada)
• Sponsoring Organization: Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 10134618
• Report Number(s): EPRI-TR--101699; ON: UN93009005
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104
42 ENGINEERING
420200
BOILERS
COMPONENTS
FACILITIES, EQUIPMENT, AND TECHNIQUES
FOSSIL-FUEL POWER PLANTS
MAINTENANCE
TRAINING
WELDED JOINTS
WELDING