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SO2 relief valve

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scbohlman

Chemical
Joined
Dec 3, 2008
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1
Location
US
Here is the problem. The facility I am working for does not have the national board number for a 30,000 pressurized sulfur dioxide vessel.

That is the first thing contractors ask for when we ask them to test its relief valve. Then they also get squeamish because it is SO2. They seem to do only anhydrous ammonia or LP, but no one will touch SO2.

Anyone have any tips?
 
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