PWHT boiler with tubes
PWHT boiler with tubes
(OP)
I have the job to replace the furnace on a small boiler,
I have to PWHT afterwards,(a must on this job) Sec I boiler 150PSI
Q= will the tubes survive the 1150 F?
the tubes are newer and I do not mind to re-roll and but I do not want to replace them. Any one outthere who has
experienced this.
thanks in advance
genb
I have to PWHT afterwards,(a must on this job) Sec I boiler 150PSI
Q= will the tubes survive the 1150 F?
the tubes are newer and I do not mind to re-roll and but I do not want to replace them. Any one outthere who has
experienced this.
thanks in advance
genb





RE: PWHT boiler with tubes
This sounds like a closure weld PWHT. If the tubes are carbon steel they should be acceptable for service.
RE: PWHT boiler with tubes
they are thing wall c/s SA178A .095 rolled and beaded
my concern is: will the tube ends will survive and will
not leak after PWHT,
I hate to get a surprise and have to replace the tubes
I do not mind roll and bead again but will they hold?
I know that in locomotive boilers the tubes were anealed after roll and bead but they were 10 ga or better.
I may try but it will be costly if it does not work.
thanks again.
genb
RE: PWHT boiler with tubes
Yes, the tubes will survive. I would suggest you follow Section VIII, Div 1 post weld heat treatment ramp up and cool down rates to allow the tubes and tubesheet to move together.
Yes
RE: PWHT boiler with tubes
RE: PWHT boiler with tubes
RE: PWHT boiler with tubes
genb
RE: PWHT boiler with tubes
the process was succesful,
a very light re-rolling was needed after PWHT,
Great advise, Thanks,
genb