Bolt Hole Diameter Versus Anchor Bolt Diameter for Lug Supported Vessels 1

[PressureVesselEngr]

Hello all,

I am reviewing a vertical vessel drawing with four support lugs. The drawing specifies to use 1" diameter bolts with a 1[sup]1/8[/sup]" anchor bolt diameter and I wanted some feedback if this is reasonable. Is there a standard table of bolt hole diameters for particular bolt sizes used in a lug supported vertical vessel in the ASME BPVC? Or is this more of a standard set from company to company? Any input would be greatly appreciated.

Thanks

 

[tankman64]

Better to have a larger clearance hole, say 1 3/8, then supply a loose square washer 1 1/8 x 3/8 thick for field welding.

 

[JStephen]

For standard anchor bolt chairs (chairs for uplift, not support of vessel), Megyesy's handbook shows holes 1/4" larger than the bolt size. Too small, and you run into tolerance issues, too large, and the nuts could be pulled through the holes.

 

[PressureVesselEngr]

Thank you tankman64 and JStephen for the feedback. I will take this into consideration and look into the details of Magyesy's Pressure Vessel Handbook.

Cheers,

PressureVesselEngr