Duplex 2205 for High Pressure Piping
Duplex 2205 for High Pressure Piping
(OP)
Does anyone have any ideas why ASTM 240 is not listed as a specification in ASME 31.3 Appendix K (the Allowable Stresses Table for Chapter IX High Pressure piping)?
Does anyone know of a reason it would not be a suitable material for high-pressure?
Does anyone know of a reason it would not be a suitable material for high-pressure?





RE: Duplex 2205 for High Pressure Piping
I guess there is no way to edit a post after I've posted it.
RE: Duplex 2205 for High Pressure Piping
I FOUND IT!
B31.3-2008 Page 139
Specification Index for Appendix A (Cont'd)
A 789 Seamless and Welded Ferritic/Austenitic Stainless
Steel Tubing for General Service
26Cr–4Ni–Mo A 789
26Cr–4Ni–Mo A 790
P/S no. Grade Note MinT Ten Yield 100F .. NO MORE
S-10H S32900 (25) −20F 90ksi 70ksi 30.0ksi .. NO MORE
Note(25)
This steel may develop embrittlement after service at approximately 316°C (600°F) and higher temperature.
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Duplex 2205 for High Pressure Piping
Thanks. I did not check Appendix A since I was so focused on the high pressure requirements of my application (10,000 PSI). What I'm really asking is, if this material is so strong, why would it not be listed under Appendix K? Or am I being too careful? (Hard to imagine being too careful with such a high pressure).
Is it appropriate to use this for high pressure?
Thanks
RE: Duplex 2205 for High Pressure Piping
Some checks would need to be performed.
RE: Duplex 2205 for High Pressure Piping
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Duplex 2205 for High Pressure Piping
RE: Duplex 2205 for High Pressure Piping
Duplex stainless steels(2205) have a limit on the maximum temperature for continuous operation.
Continuous operation above ~600F leads to embrittlement. Some vendors recommend lower limits.
Where the chlorides exceed certain maxima, some 2205 vendors suggest an upgrade to the welding materials. This should be considered when pH of the liquid is less than 5.0
My opinions only...
-MJC