AWWA flanges temperature

[RVDallas]

Hello,

I'm looking at AWWA C207 flanges and I want to know the highest temperature appropriate for each class of flange and its given pressure rating.

Section 1.3.2.5 states "Pressure ratings are for conditions and temperatures customary in water utility service."

What are the highest temperatures encountered in water utility service? If it's just ambient, what's ambient assumed to be?

So for instance if I have a Class E flange, which the AWWA spec rates to 275psi, what's the temperature of the water that can be in the line if the water is at 275psi? Can the corresponding saturated steam temperature of 275psi be used?

Any help appreciated.

 

[ione]

In waterworks service temperatures should be those typical of atmospheric conditions. So those flanges are not suitable for steam at 275 psig, that is at a temperature of approx 414 F. Well they're actually not suitable for steam service at all.

 

[rconner]

I'm not exactly sure I understand the intent or application here. Of course, AWWA C207 devoted to steel flanges for “…Waterworks Service…”, contains the following statement right upfront,

“In waterworks practice, it is not necessary, within the scope of this standard, to deal with temperatures greater than the atmospheric range, and it is possible to restrict consideration to joints with softer gaskets and to flanges that are flat faced. The designs were prepared in conformity with these limitations.”

[The reference to "saturated steam" is confusing.]

 

[RVDallas]

I'm trying to figure out the pressure and temperature ratings of AWWA C207 flanges. A standard like ASME B16.5 gives pressure and temperature ratings for material groupings, and I wanted similar ratings for AWWA flanges. However AWWA just gives a pressure rating, and then says "atmospheric conditions". I just want to verify what atmospheric conditions are, and to verify that steam service is not "Customary in water utility service". Is there a standard temperature used, I would assume maybe 100F to account for hot days?

 

[ione]

The highest temperature recorded in the US is 134 F (Calififornia, July 10, 1913 Death Valley) which is by far lower than that of steam at 0 psig (212 F).