Fill height 1

[1ndtman]

Hello

I ran a calculation for product fill height and the value came out higher than the height of the tank! Does this mean I use the height of the tank as the fill height?

thanks for your time.

 

[LittleInch]

How on earth is anyone going to give any advice based on zero technical information?

Hint. If product fill height is greater than tank height it will overflow!

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[1ndtman]

Little

Didn't want to bore anyone with details if it was a common occurrence to calculate a product safe fill height larger than the tank.

Height 22.6' Dia 11.5' t min 0.100" SG = .97 E = .70 material unknown

 

[LittleInch]

You've lost me I'm afraid.

Can you describe what you're calculating, the volumes you're using and for what purpose. What code?

Quite clearly if the product fill height is greater than the height of the tank then something has gone more than a little but wrong.

But you're not telling us anything we can use to see where the error is.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[1ndtman]

I am trying to calculate API 653 fill height for furnace oil with an SG of .97

4.3.3.2 If the tank will be hydrostatically tested, the hydrostatic test height, Ht, shall be limited by one or more of the following methods. The tank shall not be filled above the level determined by the lesser value of Ht determined below.
a) After determining the controlling thickness of an entire shell course, Ht calculated as follows:

Ht = St E tmin + 1
2.6D

where
Ht is the height from the bottom of the shell course under consideration to the hydrostatic test height when
evaluating an entire shell course in feet; or
is the height from the bottom of the length, L, (see 4.3.2.1) for the most severely thinned area in each shell
course to the hydrostatic test height in feet; or
is the height from the lowest point within any other location of interest to the hydrostatic test height in feet;
St is the maximum allowable hydrostatic test stress in pound force per square inch (lbf/in.2); use the smaller of
0.88Y or 0.472T for bottom and second courses; use the smaller of 0.9Y or 0.519T for all other courses.

 

[IFRs]

Yes. Your max fill is limited to the tank height. Your calculations simply show that you have excess shell plate thickness.

 

[MJCronin]

O M G !!.... eng-tips just gets worse and worse....

MJCronin
Sr. Process Engineer