all,
8" gate valve. wedge material
is carbon steel (A216 WCB). wedge harfaced
area became less thick due to wear.
1) can we remove original overlay and apply
13%chrome overlay ? in this case which
welding rod should we apply. if yes can you
please send me WPS for this ?
Ans:
yes u can removed.
you can qualified WPS on plate using 309L as buffer layer and 316L subsequent run
2) we can not able to trace the original
harfaced material b'se it is old valve. PMI is
showing Ni- 51% , Fe-25% and Cr- 18 %.
what is this material ?
Ans: may b due to long time in service its chemistry changed.
hope this help!!
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8" gate valve. wedge material
is carbon steel (A216 WCB). wedge harfaced
area became less thick due to wear.
1) can we remove original overlay and apply
13%chrome overlay ? in this case which
welding rod should we apply. if yes can you
please send me WPS for this ?
Ans:
yes u can removed.
you can qualified WPS on plate using 309L as buffer layer and 316L subsequent run
2) we can not able to trace the original
harfaced material b'se it is old valve. PMI is
showing Ni- 51% , Fe-25% and Cr- 18 %.
what is this material ?
Ans: may b due to long time in service its chemistry changed.
hope this help!!
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
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