UG-45 Min Nozzle Thickness

[BrentP]

Question for folks.

Is there any time that a 1.5" nozzle, not an inspection opening, is exempt from the minimum thickness of UG-16, 0.0625" ?

Thanks

 

[david339933]

No,

Assuming 0.625" is min required for tb1 and/or tb2

tb = min (.127", max(.0625",.0625")
tb = .0625"

tug-45 = max(ta,.0625")

So even in ta is less than .0625", max is 1/16".

 

[BrentP]

Thanks.

That's what I thought. New to all this so had to double check.

Thanks again

 

[SnTMan]

Don't forget to apply any corrosion allowance.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[bpv66]

There is a misconception among some Certificate Holders that small nozzles and fittings are exempt from UG-45 (or UG-44) calculations. Small openings that comply with the requirements of UG-36(c)(3)(a) are only exempt from reinforcement calculations and UW-15 weld strength calculations.

All nozzles are required to have UG-45 nozzle neck calculations and B16.9 and B16.11 fittings are required to be calculated as straight seamless pipe per UG-44.

Bob