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Web Openings in Structural Steel

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Are there any special procedures that should be followed when cutting 
circular openings in the webs ? I have an existing  W33x130 that will have a 
8 inch diameter hole field burned.  The hole will be reinforced with a 3" 
long piece of pipe that is to be snug fit in the hole and fillet welded to 
the web on both sides. Does the cut surface have to be ground smooth for 
example ? I'm using AISC Steel Design Guide #2 for design check.
Thanks for any comments.