2 replies to this topic

[Nageswar Kotari]

Hi all,

Can some one tell me why a tapping (Branch Connection) from a header line should be taken from the top(for liquids) and from the bottom(for gases)?

There are many answers like drain points, venting out and all. But is there any exact logic behind this.

Further to that Compressed air(Utility) comes under which condition?

Thanks a lot for your advices. I owe a lot to you all for sharing this valuable knowledge here.

Nag

[breizh]

Hi all,

Can some one tell me why a tapping (Branch Connection) from a header line should be taken from the top(for liquids) and from the bottom(for gases)?

There are many answers like drain points, venting out and all. But is there any exact logic behind this.

Further to that Compressed air(Utility) comes under which condition?

Thanks a lot for your advices. I owe a lot to you all for sharing this valuable knowledge here.

Nag

Hi ,
As an example , consider dirt ( particles, rust, chemicals ,...) settling at a bottom part of a header during a shut down and when you want to restart if piped underneath a header , big chances for pluggages.
Regards
Breizh

[marthin_was]

I would prefere for both vapor branch and liquid you definitely should take from the top. Consider the dirt that may entrained and result in headache for our equipment.

but for two phase flow, like wet steam for instance, I would prefer using impact tee, it will resulting in equal phase splitting.




Nag[/quote]

Hi ,
As an example , consider dirt ( particles, rust, chemicals ,...) settling at a bottom part of a header during a shut down and when you want to restart if piped underneath a header , big chances for pluggages.
Regards
Breizh
[/quote]