Failure of boiler tubes
Failure of boiler tubes
(OP)
We are carrying out root cause analysis of boiler tubes failure in which tubes severely bulged and expanded by reducing wall thickness,actual OD was 76.2 after expansion OD is 91mm.Best possible reason ?





RE: Failure of boiler tubes
RE: Failure of boiler tubes
Keep in mind that it doesn't have to look exactly like this photograph. There can be any ammount of distortion as long as it looks like a "Fish Mouth".
http://www.babcock.com/pgg/tt/pdf/E1013153.pdf
RE: Failure of boiler tubes
Cheers.
RE: Failure of boiler tubes
overheating schema
long term overheating (on short term overheating the edges of the fish mouth are thinner)
creep schema
creep failure
luis marques
RE: Failure of boiler tubes
The NALCO Guide to Boiler Failure Analysis ISBN: 0070458731 (1990). "Description: This book illustrates and explains virtually all common failure modes which adversely affect boiler reliability. Each failure mode is well illustrated with case histories. The corrective steps necessary to reduce or eliminate each failure type, as well as precautionary notes, are provided. The book is a comprehensive, authoritative field guide for the identification and elimination of boilure failures. Boilers of virtually all pressures and many construction designs are presented."
http://