1988 Volume 74 Issue 3 Pages 559-566
The heat insulating material, fixed by several hundreds of SUS304 stud-bolts to the roof of a heating furnace, fell down. Extensive inspections of the damaged parts revealed that the accident resulted from the chloride stress corrosion cracking (SCC) of the stud-bolts.
It was infered that this SCC was caused by cooling brine which had accidentally leaked out from the skid-pipe and had soaked into the interface between the stud-bolts and the heat insulating material.
The countermeasures to avoid the recurrence of the accident due to SCC were proposed as follows;
1) the use of SUS3IOS stud-bolts
2) the prevention of the brine-leak from the skid-pipe
3) the use of chloride-free heat insulating material.
