Creep Rupture Strength Data for A335 P22
Creep Rupture Strength Data for A335 P22
(OP)
Where I can refer Creep Rupture Strength data or curves for A335 P22 Material?
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Creep Rupture Strength Data for A335 P22
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RE: Creep Rupture Strength Data for A335 P22
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Check this and many more on the internet.
Cheers,
gr2vessels
RE: Creep Rupture Strength Data for A335 P22
http://my.epri.com/portal/server.pt?
RE: Creep Rupture Strength Data for A335 P22
The link took me to an articel meant for sale.
I will try EPRI also.
However let me be specific. we have a pipe of A335 P22 , (105 kg/cm/62 press & 500 deg^c temp.) but accidentaly was subjected to a temperature more than 600 deg. c for 4 hrs.
Visual inspection revealed a creep in the pipe. the diameter has increased by 20%. can we use this pipe back into service after hydro test?
RE: Creep Rupture Strength Data for A335 P22
Apparently your original post regarding the failure was inadvertently deleted. Anyway, here is what I would suggest if the OD has increased by more than 5% after careful cleaning and checked with calipers or a pipe tape; I would not recommend it be re-used.
In my past life when we monitored both hot reheat and main stem piping, we performed in-situ surface replication and dimensional checks for creep swell. Normally, 5-7% creep swell is a good indicator that you are reaching end of creep rupture life. Remember, this is seamless material just like boiler tubes, and when you measure OD changes of this magnitude, replacement should be scheduled. If necessary, you could possibly push this limit to 8% with comprehensive surface replicas, as I mentioned in your OP.
RE: Creep Rupture Strength Data for A335 P22
I too was surprised to see that the original mail has
become extinct suddenly. i searched but failed.
Any ways I appreciate your experience and we are also thinking on the same lines and arranging for in-situ replica followed by metallogrpahical examination of ruptured piece.
I shall get back to you with more inputs in due course of time.
RE: Creep Rupture Strength Data for A335 P22
RE: Creep Rupture Strength Data for A335 P22
RE: Creep Rupture Strength Data for A335 P22
Hope this helps.
RE: Creep Rupture Strength Data for A335 P22
This is evidence of extreme overheating damage.
I do not think you have many choices at this point in time.
Stand back...
RE: Creep Rupture Strength Data for A335 P22
We have replaced the whole P22 piping with new one and shall be hydortesting it soon.
Thanks for all guidance.