API Calculations 1

[Skeet6]

I am an API inspector. I am trying to figure out the proper way of determining Tmin for a bottom head or cone shape of the bottom of an atmoshepheric storage tank. These tanks are supported in the air and a bottom head or come has a nozzle or nozzles coming out. The top head is open and there is no pressure. How do I go about figuring out Tmin for these items. I know some how the staic load pressure has to be taken into consideration. PLaese help me in this calculation.

 

[JoeTank]

Skeet6,
Dude, this is a problem for a structural or mechanical engineer experienced in tank design. No one can guide you through this via a newsgroup. Plate thickness is only one issue that is to be addressed.

Steve Braune
Tank Industry Consultants

http://www.tankindustry.com

 

[jlarocque]

What other codes dictates conical bottom tank designs?

 

[JeffcoatSmitt]

API-620 can be used for conical bottoms, but as Steve mentions, more than the bottom plate thickness needs to be checked to ensure the integrity of the tank. The bottom plate, compression ring area, supports, and nozzle reinforcement all need to be addressed. Etank2000 software can do most of this.

Jeffcoat Smitt

http://www.etank.com

http://www.fteinc.com

 

[davidribeiro]

Optivessel will also have facilities to do the calcs Jeffcoat mentioned.

David

 

[IFRs]

Porgrams are a useful tool in the hands of an experienced engineer. No more, no less. My opinion only.