Material for basering and anchor chair
Material for basering and anchor chair
(OP)
Dear all,
We have a short skirt 5' long so we make it all stainless steel for a SS vessel. Is there any concern of contamination for CS base ring/anchor chairs that are fillet welded to the SS skirt since they are in contact ?
If we make basering/anchor chairs to SS, is there any concern of galvanic corrosion due to galvanized anchor bolts specified by structure group for the concrete foundation ?
What do you normally do on your own design ?
We have a short skirt 5' long so we make it all stainless steel for a SS vessel. Is there any concern of contamination for CS base ring/anchor chairs that are fillet welded to the SS skirt since they are in contact ?
If we make basering/anchor chairs to SS, is there any concern of galvanic corrosion due to galvanized anchor bolts specified by structure group for the concrete foundation ?
What do you normally do on your own design ?





RE: Material for basering and anchor chair
There is known glavanic corrosion issues between stainless steel and galvanized carbon steel. It is possible this will cause problems. Solutions to this problem are to either make the anchor bolts from stainless steel or install electrical isolation kits between the anchor bolts and chairs.
RE: Material for basering and anchor chair
RE: Material for basering and anchor chair
RE: Material for basering and anchor chair
Anchor bolts, and nuts, are S.S. (no corrosion allowance is added). The cost is minimum, instead of carbon steel, and zero future problems.
Regards
r6155