ASME BPVC Sec VIII Div. 1 Appendix 14
ASME BPVC Sec VIII Div. 1 Appendix 14
(OP)
Hello, new to the forum and was hoping you guys could help my coworkers and I settle a discussion.
We are working on the design of a flat circular bolted head with a nozzle through the center. ID of the nozzle is 17.25", OD of the flat head is 39.125", B.C. is 37.5", and there are 32 bolt holes (0.875" each) equally spaced.
My coworkers think that we should be able to use Appendix 14 (Integral Flat Heads with a Large, Single, Circular, Centrally Located Opening) with rim holes as per UG-39(c)(2). I am unconvinced and suspect that this design falls under the requirements of U-2(g). The real issue I'm having is the difference in wording when it comes to whether the connection has to be integral between UG-39(c)(1) and 14-1.
Any advice? Or am I totally out to lunch here?
We are working on the design of a flat circular bolted head with a nozzle through the center. ID of the nozzle is 17.25", OD of the flat head is 39.125", B.C. is 37.5", and there are 32 bolt holes (0.875" each) equally spaced.
My coworkers think that we should be able to use Appendix 14 (Integral Flat Heads with a Large, Single, Circular, Centrally Located Opening) with rim holes as per UG-39(c)(2). I am unconvinced and suspect that this design falls under the requirements of U-2(g). The real issue I'm having is the difference in wording when it comes to whether the connection has to be integral between UG-39(c)(1) and 14-1.
Any advice? Or am I totally out to lunch here?





RE: ASME BPVC Sec VIII Div. 1 Appendix 14
RE: ASME BPVC Sec VIII Div. 1 Appendix 14
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RE: ASME BPVC Sec VIII Div. 1 Appendix 14
If the opening diameter is 1/2 of the parent flange, it would be similar to a reducing flange. Would this describe your case?
The following may provide guidance:
- Chapter 2, Procedure 2-9 of "Pressure Vessel Design Manual" by Dennis Moss
- Chapter 10 of "Structural Analysis and Design of Process Equipment" by Jawad and Farr