Coke Oven gas Primary cooler

[deklerk]

Does anyone know if it is reasonable to expect SCC problem in a coke oven gas primary cooler ? What kind of SCC can be expected (H2S, Carbonate,Alkaline.....)? It is true that a single side weld (not back gouged) can reduce the susceptibility to SCC problem in such a component ? In my opinion with single sided weld i can reduce the microstructural susceptibility of the internal surface but not the residual stress on the same surface.

Thanks

Deklerk

 

[Goahead]

How can one deal with SCC susceptibility without reference to materials? An informative article from AISI on equipment (not materials) can be found at

http://www.steel.org/learning/howmade/byproducts.htm

Your second question could be answered if the residual welding stresses were known and compared between both welding techniques (single side vs. double side).
In general, before stress relieving, welding with more deposited material (single side) should present higher residual stresses and be more prone to SCC.

http://www.welding-advisers.com/

 

[deklerk]

Thanks for the indications.
The construction material is Carbon Steel, that is susceptible of SCC in the mentioned environment.
I think that with single sided weld transversal resisual stresses can be reduced on the internal surface in comparison with double sided weld, but not longitudinal stresses that can peromote as well SCC phenomena.