Too much Steam Piping Slope?

[FDS2008]

My fellow knowledgeable ones!

Is there such a thing as too much slope on a steam line? I am working on a few lines, one which is superheated (540°F @ 185 pisg) and another that is 185 psig saturated.

I realize the norm is approx. 1:100, but what about 1:200. This suits our pipe elevation better.

Any comments?

 

[kbs]

A slope of 1:200 is flatter (closer to level) than 1:100. I seem to recall 1:100 is a minimum slope using good piping practices. See link:

http://www.spiraxsarco.com/resource...eam-distribution/steam-mains-and-drainage.asp

 

[FDS2008]

KBS, you are correct!. I meant 1:50, or double the slope that of 1:100.

Sorry about the confusion!

 

[unclesyd]

Double posting is discouraged.

You need to take down the information posted on this thread and red flag it and use your post in piping forum as a conduit for the information you require.

 

[kbs]

I found this thread in a previous forum:

http://www.eng-tips.com/viewthread.cfm?qid=16008&page=286

Thread #378-160008

 

[eadwine]

As for slope it depends on the situation. the general rule of thumb of 1:100 is the nominal. then there is the max/min conditions dictated by the field. The only hard and fast rule is, do not pocket condensate lines.

 

[FDS2008]

KBS - Yes I read this post but this was the other extreme, whether slope was required at all.

Unclesyd - I posted the question under Boiler and Pressure Vessels by mistake and am new at this, so i just copied it to the piping. Will keep this in mind.

It appears that there is no restriction to a higher slope thatn 1:100, except that we need to ensure there is a good drip pocket to remove the condensate.

Do any of you have any comments regarding sloping superheated steam VS saturated steam lines. I noted that there doesn't seem to be much interest on projects that I have worked on to slope the lines and the excuse is generally that there isn't much condensate produced. However, start ups will produce condensate and you need to remove this. I always slope the lines!