Saddle Design to Be Calculated

Maybe we should take up a collection and buy a gift copy of ASME §VIII, div. 1; in the hope it gives the desired calculation info for this and many other situations. I'm willing to commit US$5 to the cause....

People do this stuff for a living (pretty good living) and went to school for many years to do so. Most places have very strict laws when it comes to building a pressure vessel. If you don't have the proper training, and education to know where to look for this information then you probably should not take this type of project on. You need to find a pressure vessel engineer who already has a copy of the standards to help you with this project. Just last week a maintenance engineer at a lumber mill just down the road from me was killed when a pressure vessel exploded, two others were life flighted from the area.

In the end I cannot suggest that you continue with this project until you find someone who is legally and technically able to help you with it. It would be a shame if someone gave you some information and you went off and killed yourself trying to use it. Pressure vessels are dangerous, even when a team of engineers design them.

I have specified and purchased horizontal pressure vessels in accordance with the rules of ASME Section VIII, Div I

The correct way to design saddles for horizontal pressure vessels is to let the fabricator of the vessel design the saddle. He will use an established, checked computer program such as COMPRESS or PVElite and give you a code stamp (certification) on the vessel.

He will probably use the rules of the PV code as well as the established methods of L.P. Zick in selecting saddle sizes and wear plate configurations. The Zick paper establishes empirical curves for developing stress levels in the shell of the vessel at the "horns" of the saddle. This methodology has been in use for over 50 years...

I always get the feeling that anyone who posts on this forum has little or no idea of the challenge in front of them, lacks an engineering degree and works for an MBA.....

My opinion only

Pl. refer book "process equipment design"

In india i have used the same @ 10 yrs. back to design the Vessel.

But still i sujjest , help of expert if you are new in this area.

By just googling and by ref. books don`t go ahead for such human life related equipment.

Master Stroke is always needed.

See the following design calculations for heat exchanger saddle support with ZICK analysis: Heat_Exchanger_Saddle Design_Calculations.

Note. The wear plate is that one located between the saddle and shell of vessel/exchanger, and is preferred to be welded into the saddle. In most cases, the wear plate have to be welded into the shell (using fillet weld) to prevent movement of vessel/exchanger while in operation, but may be in certain cases especially at low size vessel/exchanger, we don't weld the wear into the shell of vessel/exchanger, but I don't prefer that type, at least we can do tack welds only.