Performance of weld repairs on service-aged 2{1/4}Cr-1Mo girth weldments utilizing conventional postweld heat treatment and temper-bead repair techniques
Weld repair of service-damaged piping and header girth weldments has generated considerable interest within the fossil power plant arena over the past few years. The interest has stemmed in part from recent revisions to the National Board Inspection Code regarding welding repair of Cr-Mo steels and from the fact that many domestic utility power plants are nearing the end of their projected design life. EPRI is addressing a number of concerns expressed by utilities surrounding weld repair under a joint EPRI/utility program RP3484-01. The program is focused on procuring service-aged piping and header girth weldments, quantifying the level of damage associated with those weldments, performing weld repairs within the girth weldment region, testing the repair weldment mechanically and metallurgically, and comparing the increase or decrease in remaining life associated with the weld repair. This paper discusses four industry case histories along with two piping girth weld repairs performed under the EPRI program: (1) a repair performed with conventional postweld heat treatment and (2) a repair performed employing temper-bead welding repair technology.
- OSTI ID:
- 471162
- Journal Information:
- Bulletin - Welding Research Council, Journal Issue: 412; Other Information: PBD: Jun 1996
- Country of Publication:
- United States
- Language:
- English
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