dip pipe upside down

[europipe]

Good afternoon collegeas,
Does somebody know what a dip pipe with entry from the bottom of a vessel (stops just below the top of the tank) is called?
Thanks in advance for Your replies.

 

[mbt22]

Stand pipe?

Matt

 

[crshears]

Internal overflow?

CR

"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]

 

[LittleInch]

A mistake?

Bottom entry fill pipe?

Doesn't sound right whatever it is - any drawings?


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

 

[racookpe1978]

Show a sketch or picture.

 

[Afox88]

I am building a vessel for a customer right now that has that type of connection. The customer called it a liquid outlet diptube.

I am not sure what they are using it for. Possibly overflow; possibly some natural liquid separation in the vessel do to different densities and they want to pull a different composition of the vessel contents.

 

[crshears]

Hmmm...

If the customer doesn't tell you what they are using it for, and your firm has not been engaged to verify the suitability of their design for what they are trying to do, you had better not ask them in any official way; just build what they are requesting on a supply-only basis, so as to shield yourselves from liability.

I hate being like that, but today's world sometimes demands it...

CR

"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]

 

[Compositepro]

Well, if it comes up from the bottom, it would be incorrect to call it a dip tube. If it is an outlet then the correct term would be an overflow tube. This is a case of someone not knowing what to call it, so the chose a name for something that looks similar, but ignored the fact that the name comes from the function of the part and not from the look of the part. Sort of like calling an axial flow pump a centrifugal pump.

 

[MJCronin]

Is this a flat bottomed tank or dished head pressure vessel ? What is the design pressure ?

It could not be an overflow unless it is much bigger than the inlet nozzle size.

Is the vessel to be used for a cryogenic liquid ?

If so, there are advantages to add liquid in a "gentle manner" rather than dumping it in from the top.

MJCronin
Sr. Process Engineer

 

[europipe]

Hello Fellow engineers.

Excuses for my late reaction.
It is a horizontal transporttank ~1m3 with nitrogen inlet- and vent- outletpipe inside till 4" below the top of the tank,
nozzles on the bottomside for easy access, pipe inside tank to prevent damage.
I was just wondering what name the pipe has, they call it a dippipe (doesn't sound right to me, I thought maybe it is called a riserpipe?).
Maybe Matt has it right (standpipe)
I'm not so sure about it.
mr. Cronin; des.press.32 barg , des temp. 50 deg.C (where do You need that for?)

Greetings and thanks for Your reactions.

 

[GenB]

When is not known, call it any name as internals. internal pipe_____size. Is a diners responsibility to mark the nozzles.

 

[zeusfaber]

I'd guess the purpose is to try to draw the outlet from a bit of the tank that is less contaminated with entrained dirt, condensate and rust from the tank walls.

Although it comes in from the top (at least until you stand on your head to rummage about in a hole), the short debris tube inside a diving cylinder serves a similar purpose.

A.

 

[europipe]

Zeus, it's got nothing to do with debris
The nitrogen pushes the liquid uot of the tank,
and the ventpipe is to depressurise.
What I want to know is the name, not a processdescription, because I know.

Greetings and thank You all.

 

[LittleInch]

The purpose of the pipe though is important to give it a description.

I would term this an "internal vertical vent pipe" as this adequately describes its position and function.

It is a little odd to do it this way so has no normal name.

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

 

[zeusfaber]

Liquid? That's good to know!

 

[europipe]

Thanks to You all.