Tank Pate thickness__ bottom

[jlarocque]

I have a small tank for Vegetable or animal Oil 30 ft dia by 8 ft high need to know if 3/16 plate can be used? API 650 requires normally a minimum of .25 or 6mm is there a way out for an application that would be inside a building?

 

[jlarocque]

It could also be a different API or other related standard

 

[Tankman650]

Consider making several smaller tanks that can be shop built and delivered to the site. Use UL-142 specifications.

 

[jlarocque]

Yes but the tank is inside on a concrete base...things APi do not really cover....

 

[Tankman650]

I am sorry, i don't understand what you just said.

Again, use UL-142 or use stainless steel tank and Appendix S of API650 which allows 3/16".

 

[jlarocque]

The new tank is going inside a building...( now wind and snow loads, no exterior corrosion)
and the tank is also sitting on a full concrete pad. API tanks are either on a concrete ring or on an earth slab.

 

[Skeet6]

If you refer to API 650, Appendix A. Go to table A-4b, it allows you to have a 3/16" shell course for a 30 ft diameter 1 shell course tank. Also refer to API 650 3.6.1.1. This refers you to smallest nominal plate thickness for a given diameter

 

[MJCronin]

This is kind of a wacky tank.....isn't it ??

30 foot diameter by 8 foot shell.......about 42,000 gallons

Yet...it is somehow indoors ???

This means that there are no columns within this building with at least 30 foot spans ?

Is this some kind of used vegetable oil storage tank located within a hockey rink ???

Why would you not want to break this volume up into two or three smaller tanks ? Perhaps two nice horizontal tanks, on saddles.... about 10-12 foot diameter ???

MJC

 

[jlarocque]

It's for inside Biodiesel. space is a limiting factor and we need to have the product in one tank...bio needs to be treated in a warmer space....and we have space for it

 

[JoeTank]

API-650 would require a 3/16 (5mm) shell and a 1/4 (6mm) bottom. No exceptions that I know of.

Steve Braune
Tank Industry Consultants

http://www.tankindustry.com

 

[PEStructural]

Have you considered a steel bolted tank? You can use 12 gage steel (0.1046 in) thick bottom. The applicable standard is API 12B.

 

[JeffcoatSmitt]

As stated above API-650 Appendix A will allow for a 3/16" shell and 1/4" bottom with no radiograpy. Depending on roof loads and internal pressure a 3/16" or 1/4" Domed Roof would work. If a domed roof is too tall, a conical roof is possible. But an unsupported conical roof with a 2:12 slope would have to be 0.455" thick, so a supported roof would be more practical.

 

[JeffcoatSmitt]

I didn't see the header. If you're asking about a 3/16" bottom, API-650 Appendix S will allow this only for stainless steel.

Jeffcoat Smitt

http://www.etank.com

http://www.fteinc.com