how to calculate a bellow in compress according to APPENDIX 26

[vida23]

how to calculate a bellow in compress according to APPENDIX 26?

 

[LSThill]

vida23 (Mechanical)

If using CODEWARE COMPRESS Pressure Vessel and Heater Exchanger Software post your question on Compress users group or e-mail Codeware Support.

 

[JohnBreen]

vida 23,

Apparently the community is having some difficulty in understanding your question. Perhaps it would be useful for you to rephrase your question and give some references to help the community understand what you are asking for.

John

 

[vida23]

dear all
thank you for your reply.
i use COMPRESS for the designing. but COMPRESS does not supply a method for BELLOW.
i also use PVElite to calculate the BELLOWS, but some steps do not meet APPENDIX 26.
i think the 'UG-29' rule maybe 'UG-28' which is mentioned in appendix 26-6.5.2, but how to determine the value La in UG-29? the total length of shell or only the bellow length? i don't know. it's very difficult to understand for me.