Cracking of a Weld That Joined the Head to the Shell of a Steam Preheater Because of Poor Root Penetration
A weld that attached the head to the shell of a preheater containing steam at 1.4 MPa (200 psi) and was used in the manufacture of paper cracked in service. The original joint contained a 6.4 by 50 mm backing ring that had been tack welded to the inside surface of the shell in a position to project beyond the fully beveled top edge of the shell. The projecting edge of the ring fitted against a deep undercut on the inner corner of the rim of the head. The internal 90-deg angle in this undercut was sharp, with almost...
Cracking of a Weld That Joined the Head to the Shell of a Steam Preheater Because of Poor Root Penetration, ASM Failure Analysis Case Histories: Pulp and Paper Processing Equipment, ASM International, 2019, https://doi.org/10.31399/asm.fach.pulp.c0047529
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