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Technical Frequently Asked Questions
"304 Stainless steel vs. galvanized nuts and bolts"
Question:
"I am
working on a wastewater project in venezuela and would like to
determine the pros and cons of using galvanized nuts and bolts
versus stainless steel nuts and bolts for the standing seams of
a tank. The tank itself is made of 304 stainless steel. "
Answer:
The
answer to your question, to some extent, depends on what media
will be stored in the tank. In general, that combination is not
a good one, due to the potential for accelerated, galvanic corrosion
of the bolts. The American Water Works Association Code - AWWA
D103 addreses bolted Tanks for potable and waste water service.
This document can be purchased over the internet. For potable water
storage, 304SS bolts and other hardware are required. For various
types of "waste water" and leachate, SS bolts are highly
suggested. For the slight price addition, I would use the stainless
steel bolts (unless there were chlorides present)
Some websites to consider:
www.bhtank.com
www.columbiantank.com
www.dorntank.com
www.mwtank.com
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