SS/CS
SS/CS
(OP)
All,
Apologies if this has been covered elsewhere but I could not find it,
I have an ASME VIII A516 Gr70 unlined vessel and have been requested to weld in some 316L internals (baffles, weirs). The internals are not pressure retaining. The internals and their connections are small relative to the large mass of CS. Can I proceed and weld in the internals with suitable electrodes? Is there some method of assessing the 'corrosiveness' and rate of corrosion given the sizes of the available anode and cathodes therefore, calculating a design life?
Cheers,
Apologies if this has been covered elsewhere but I could not find it,
I have an ASME VIII A516 Gr70 unlined vessel and have been requested to weld in some 316L internals (baffles, weirs). The internals are not pressure retaining. The internals and their connections are small relative to the large mass of CS. Can I proceed and weld in the internals with suitable electrodes? Is there some method of assessing the 'corrosiveness' and rate of corrosion given the sizes of the available anode and cathodes therefore, calculating a design life?
Cheers,





RE: SS/CS
RE: SS/CS
E309/ER309 for service temperatures below 800 deg F
Above, use Inco weld A or equivalent.
RE: SS/CS
Corrosion between stainless steel and carbon steel becomes an issue when the carbon steel is electrically connected and in a very small area compared to the stainless.
Carbon steel is, of course the "sacraficial anode" in the couple
This sometimes happens in a fabrication shop when the same brushes/abrasive wheels are used for both materials.
The two materials are not far apart in the galvanic series.
Good luck
-MJC
RE: SS/CS
Steve Jones
Materials & Corrosion Engineer
http://www.oilandgaspeople.com/cv/11499664
http://www.linkedin.com/pub/8/83b/b04