Position of branch 1

[jafary64]

Hi my friends
I work on oil and gas company and when I study p&id for hose station see below note
All steam,steam condensate,fuel gas,air & nitrogen branch connection shall be on the top of the header piping
I want to know
1- what is the reason of position branch on header (top of pipe)
2- Do you know any standard or spec.that explain and accept it
Thank you

 

[DGrayPPD]

jafary64,

Top branch connections carry the driest steam/gas. When a branch take-off is from the bottom of the header, the line is subject to condensate build-up. Remember, air rises and water sinks. It also creates a low point for debris build-up which could clog your line. Both of these factors are far less ideal when routing your piping because they could significantly impact your equipment performance.

As far as standards go, I'm not sure that you will find this in the design code, but there are many PIP standards that detail this for you. I would suggest getting a copy of PIP PNC00005 "Design of ASME B31.3 Metallic Piping Systems." I've also included a link below for you to review.

http://www.spiraxsarco.com/Resource...am-distribution/steam-mains-and-drainage.aspx

"Thinking is the hardest work there is, which is probably the reason why so few engage in it."

-Henry Ford

 

[mk3223]

Added to above, the branch took off from horizontal orientation is not desired because it may take useable space for other piping, especially along the pipe rack. It could be related to an economic factor.