Reinforcement calculations on rectangular head

[Sam35]

I want to add a 3 NPS nozzle to a rectangular header box (3/4" thk) of an air-cooled heat exchanger. The opening does not meet the requirements of UG-36(c)(3) of ASME Sec VIII Div.1. Also, the diameter of the opening exceeds one half of the shortest span of the head as mentioned in UG-39(c). Here, the reinforcement calculations are required to be performed per U-2(g)as mentioned under UG-39(c)(3). If so, are there any references to perform the calculations.

 

[StressGuy]

Does API-661 "Air Cooled Heat Exchangers for General Refinery Service" have what you're looking for?

Edward L. Klein
Pipe Stress Engineer
Houston, Texas

All opinions expressed here are my own and not my company's.

 

[Sam35]

Edward,
I don't think if API-661 addresses this issue.
Sam

 

[LSThill]

Hi Sam35 (Mechanical)

Regards the Engineering Tool's for this Requird Analysis FE-PIPE, NOZZLE PRO.

Leonard@thill.biz

http://www.thill.biz

 

[Sam35]

Hi Leonard,
Looks like Nozzle-pro deals with circular flat heads and not rectangular flat heads.
Thx,
Sam