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Compress and UG-45(b)(1)

Compress and UG-45(b)(1)

Compress and UG-45(b)(1)


When performing UG-45(b)(1), why does the program sometimes use the Appendix 1-1 formula for tr and other times the UG-27(c)(1) formula is applied?


RE: Compress and UG-45(b)(1)

It depends if you are going for a fabricated nozzle (made by plate).

RE: Compress and UG-45(b)(1)


The UG-27(c)(1) formula is based on the cylindrical shell inside radius. The Appendix 1-1(a)(1) formula is based on the outside radius.

You may have modeled some cylinders based on the OD and some based on the ID. Compress will use the UG-27(c)(1) formula for nozzles located in the "ID" cylinder and Appendix 1-1(a)(1) formula for nozzles located in the "OD" cylinder.

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