SA 285-C FBQ
SA 285-C FBQ
(OP)
We have a 1951/52 vessel "alteration" to do and the shell material along with some very large nozzles and all reinforcement pads utilize SA 285-C FBQ material. I know that FBQ means Fire Box Quality and I have seen it used with other materials also. Does anyone out there know if all SA 285-C material is FBQ or is this some special version of SA 285-C. You see FBQ more on much older vessels. What does Fire Box Quality (FBQ) mean?





RE: SA 285-C FBQ
RE: SA 285-C FBQ
Check this site out.
http://www.trainweb.org/tusp/r_links.html
RE: SA 285-C FBQ
Firebox Quality steel plate had tighter control over chemical composition to assure specified minimum mechanical properties prior to the development of SA 515 steel plate. SA-285 Grade C is not the same as fire box quality SA 285 Grade C. If anything, SA 515 plate would be an equivalent material substitution.
RE: SA 285-C FBQ
RE: SA 285-C FBQ
Have hand forged a couple of rear flue sheets in some restorations and used 515,but thats another story.
Do your calcs. and check with your AIA.
RE: SA 285-C FBQ
Finally, I would like to especially thank metengr, deanc & stanweld for their insight and shedding light on this issue. I want you to know that this small clarification has helped me and it has, once again, helped influenced my supervisors opinion of my ASME Code abilities. I am appreciative of these replies and for Eng-Tips.