Welcome to the aboveground storage tank forum, a bulletin board dedicated
to tanks, fuel tanks, plastic tanks, fuel storage tanks, and above ground storage
tanks (AST) API650, API653 & UL142
aboveground storage tanks (AST) and chemical plastic tanks. Remember the forum
is made up of volunteers from experts to beginners. Unfortunately, we cannot allow free commercialism that promotes products, services, or sites.
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Re: weld passes of bottom plate - Thursday, March 10, 2011 - BABRTs 973 [53]
Should or shall? 8mm can be done with a single pass. Some companies require two pass on all plate thickness, some two pass on over 6 mm. This is up to the fabricator and/or the owner. Have seen a single pass on 10mm laps, but the welders that can do that are few and far between.
Re: weld passes of bottom plate - Thursday, March 10, 2011 - BABRTs 973 [53]
I read the question to mean the floor plates. However I cannot find in the standard where two pass is required for either the floor plates or the corner weld. API 650 5.1.5.7 gives the fillet weld sizes.
Re: weld passes of bottom plate - Thursday, March 10, 2011 - BABRTs 973 [53]
Thanks! 5.1.3.4 Single welded lap joints are permissible only on bottom plates and roof plates. 5.1.3.6.1 a - SMAW greater than 6mm requires multipass I stand corrected and thanks again!
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ETANK2000: The #1 CAE tool for aboveground storage tank design / re-rating / inspection evaluation to API-650, API-620, API-653, & UL-142
AMETank (comming soon): All of the ETANK2000 engineering / code calculations plus Bill of Materials, Fabrication Drawings, and (soon) Estimating.
4611 Broad River Road, Suite I
Forum 
Should or shall?
Industrial Training School and AIS Forensic Testing Laboratory.
