Api-650 or ASME Sec.VIII?

[carletes]

Hello all,

I have a question about which design code is to be used when designing atmospherical tanks or at a very low pressure but they are not vertical or/and cilindrical as defined in API-650. Is it possible to use ASME Sec.VIII? Are there specific codes for those purposes?

Thank you all

 

[unclesyd]

Check out API-620.

You can use ASME Sec VIII on some vessels/tanks but you will end up with a very sturdy high price tank. Check out the API Specs and see if your tank falls under either tank spec. The cost difference between a tank company and ASME fabricator is quite extensive. A tank fabricator will be able to do the on-site fabrication if it's needed.
We always tried to stay with the tank codes if possible.

 

[GenB]

Atmospheric I would stil use asme sec 8 with allowances for a little pressure, say 5 to 15 psi,
you will have to consider all the parammeters as loads and corrossion, seismics and more. even if not stamped.
ERomero

 

[MJCronin]

carletes,

API-620 is commonly used for tanks operating between 2.5 and 15 psig as well as tanks that operate out of the temperature range of API-650. API-620 is used for flat bottomed tanks as well as tanks with dished heads.

Tanks designed, fabricated, inspected but not stamped to ASME VIII are commonly specified for use in the process chemical industry for pressures from 2.5 to 15 psig. These tanks are only marginally more expensive than other alternatives WHEN NOT CODE STAMPED.... This type of tank typcally has two dished heads and is commonly supported on two saddles (horizontal axis) or multiple legs (vertical axis.....

What are you storing and what is the vapor pressure at 110F ?

Come back !!???


MJC

"There comes a time in the affairs of man when he must take the bull by the tail and face the situation." W.C. Fields

 

[CHD01]

For conventional carbon steel, a flat bottom tank per ASME Section VIII is competitive in price versus an API standard tank until you get above approx. 20 ft Diameter x 20 T-T; then as it gets larger , the API tank will continue to get cheaper.

The more you learn, the less you are certain of.