Quote Originally Posted by AnandV View Post
You will also have to pay attention to gaskets to make it air tight. I guess you will have to use metallic gaskets. Specification of tolerances, torques for bolts etc will also have to be considered.
Please enlighten us about the whole process of design. Never done it myslef
Me neither...

This project is only in quotation phase, so maybe I'll never have to calculate this complete. But I'm interesting how to do it nevertheless. You never know when it becomes interesting.

At this moment, I calculated the flat head using ASME UG34. Nothing difficult about that.

I based my design on a picture from a powerpoint presentation:

[link Point to another website Only the registered members can access]
By combining this design (head + ring for gasket + screwing ring) with thread calculations (appendix B of ASME B1.1-2003) and some common sense, I have now some basic results. Good enough for this quotation, but not good enough yet for a real world application.

I'm still searching for information how to calculate trapezium, square, ASCE and/or Buttress threads. All I find is the information about standard bolts and nuts. But for this application, I would need the strength- and size- calculations for internal and external threads with very large diameters (1500mm and more) and a 'normal' pitch (less then 50mm, as small as possible)

If anybody has this information, and is willing to share, I'm very interested!