International standards do not generally provide requirements or guidance on minimum fillet weld sizes. The only example of such guidance is AWS D1.1, which includes the following table (size=leg length): Table. Minimum fillet weld sizes Notes
For non low-hydrogen processes without preheat calculated in conformance with 4.8.4, T equals thickness of thicker part joined; single pass welds shall be used. For non low-hydrogen processes using procedures established to prevent cracking in conformance with 4.8.4 and for low-hydrogen processes, T equals thickness of thinner part joined; single pass requirement shall not apply. 1. Except that the weld size need not exceed the thickness of the thinner part joined. 2. Minimum size for cyclically loaded structure shall be 3/16in [5mm].
2 Comments
S.KARTHIKEYAN
7/10/2014 11:51:24 pm
hii
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Muthukrishnan Kumarasamy
7/11/2014 12:33:01 am
Its a short reminder to the Note.2 that the cyclically loaded structures must be 5mm minimum. Static loaded structures of said size can be 3mm but with a convex weld for the additional surface tension on cooling benefit. As you are a member of IWS you can access AWS D1.1 document for free, which explains this in page 168. Hope this helps.
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