Piping Loads on a Surface Condenser

[Boghi1990]

Hi,

I have run a pipe stress analysis for a piping system which carries condensate to a condenser. Two of the lines (NPS 4 & NPS 6) are piped to a surface condenser. The lines run through the condenser shell(3/4" thickness). They are welded on both sides of the surface condenser and run a few feet inside the condenser. From the piping stress analysis I have got the piping loads(Fx, Fy, Fz, Mx, My, Mz) at the anchor points where the lines are attached to the vessel shell. I have modeled a anchor points the interface where the lines connect to the condenser wall. There are not any allowable loads provided by the manufacturer of the vessel. I have to determine if those piping loads are acceptable from the point of view of the structural integrity of the condenser shell?

Could anyone suggest what I can do in order to evaluate the effect of the piping loads on the wall of the vessel?

Regards,

One Point

 

[BigInch]

Normally the vessel mfgr is responsible for that and you would be responsible for the piping only. Or are you working for the vessel mfgr trying to figure out the allowable loads? Otherwise there is little choice except to wait for the mfgr to respond with the allowable loads. Any analysis you do on that part, if you are not working for the vessel mfgr, would not be acceptable as proof that the vessel is adequately designed, nor would the vessel mfgr support their warranty, should the nozzles break under your calculated "safe" nozzle loads. Tell your project manager that he should be working to get the safe nozzle loads from the mfgr, not joining him in wasting time chasing green fairies.

"People will work for you with blood and sweat and tears if they work for what they believe in......" - Simon Sinek

 

[Boghi1990]

Hello Big Inch,

I am not working for any vessel manufacturer and so I am not trying to figure out the allowable loads. This surface condenser (flat walls), has been been in operation at this power plant unit since 1969. I have already contacted the manufacturer (Foster Wheeler ), but so far, they have not given me the allowable loads on their nozzles.

Someone has suggested to me that I can use WRC-297 and Roarks 7th edition, Section "Formulas for flat circular plates of constant thickness", Case 21b. and papers 22, 85, 86, and 87 referenced in that chapter or section of Roarks.
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Condensers and Feedwater Heaters
Foster Wheeler has been actively and continuously involved in the design and fabrication of feed-water heaters and steam condensers since the turn of the century through its predecessor, Wheeler Condenser & Engineering Company, which was founded in 1891.