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WRC BUL 354

1990 Edition, June 1, 1990

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FAILURE ANALYSIS OF A SERVICE-EXPOSED HOT REHEAT STEAM LINE IN A UTILITY STEAM PLANT ; THE INFLUENCE OF FLUX COMPOSITION OF THE ELEVATED TEMPERATURE PROPERTIES OF CR-MO SUBMERGED ARC WELDMENTS



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Product Details:

  • Revision: 1990 Edition, June 1, 1990
  • Published Date: June 1990
  • Status: Active, Most Current
  • Document Language: English
  • Published By: Welding Research Council (WRC)
  • Page Count: 132
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

The two papers contained in this Bulletin provide definitive information concerning the elevated temperature rupture behavior of 2 1/4Cr-1Mo weld metals. The first paper gives a detailed metallurgical failure analysis of cracking in a longitudinally welded hot reheat pipe with 184,000 hours of operation at 1050o F. The second paper defines the role of the welding flux in submerged arc welding of 2 1/4Cr-1Mo steel. Publication of this report - WRC Bulletin No. 354 was sponsored by the Steering and Technical Committees on Piping Systems of the Pressure Vessel Research Council of the Welding Research Council. A crack approximately 14 inch long was discovered in a longitudinal seam weld in a hot reheat line of TVA Gallatin Unit 2 during ultrasonic inspection (and subsequent by by MT examination). Initially a boat sample was removed and an entire spool piece (20 ft) was subsequently replaced. A metallurgical evaluation was undertaken to determine the characteristics of the defect and the reason for its occurrence.