eccentric reducers

Where?

You did not give us enough information to provide a specific answer.

Basicly, condensate is just a hot liquid (water) and you can orient an eccentric reducer the same way you would for any other liquid for that specific location.

PennPiper gave a much more sophisticated answer here:

http://cr4.globalspec.com/thread/26422/eccentric-reducer

Thanks for your reply!!! How about on a heating system i was taught that you put the eccentric reducer flat on top so you do not trap air in the system. How do you feel about that?

When considering condensate return lines, you need to know if it is:

- Single phase flow (a pumped condensate return line)

- Two phase flow (steam traps discharging from a higher pressure system into a lower pressure system.

If it is single phase flow, then treat it like you would any pumped water line.

If it is two phase flow the piping must be done so that it is NOT conducive to condensate induced water hammer.

Condensate induced water hammer is the #1 reason for catastrophic pipe failure in a steam and condensate system, followed closely by water hammer in the steam system caused by a water slug.

The following links discuss condensate induced water hammer in further detail (see Fig 10.3.7 for visual clarification:

http://www.spiraxsarco.com/resources/steam-engineering-tutorials/steam-distribution/steam-mains-and-drainage.asp

http://www.hss.energy.gov/csa/analysis/oesummary/oesummary2006/2006-11-01.pdf

For steam distribution systems - you should ALLWAYS use eccentric reducers, with the bell part on the top of the pipe. This is done to prevent a water level developing in the bottom of the pipe (which contributes to water hammer).

The following link shows best piping practices for reducers:

http://www.flowcontrolnetwork.com/issuearticle.asp?ArticleID=144

I hope the above aid you in designing & installing a safe & efficient steam & condensate return system.

Dweezle thanks for your answer Still need to know on a two phase flow should the eccentric reducer be flat on top or bottom?