Vaporization of anhydrous ammonia?

[MAPower]

I have a water bath type ammmonia vaporizer in which the required supply ammonia operating range is 180 - 240 psig. The water bath temperature is set at 180 deg. F. The vaporizer vendor only wants single phase liquid ammonia being supplied to their equipment. I may need to bypass booster pumps and supply liquid ammonia at about 140-150 psig @ ground temperature (70 F). Would there be any issues here with the ammonia vaporizing/flashing before it arrives at the vaporizer, or other issues? I am not a chemical engineer and need some aid.

Thanks

 

[dcasto]

The vendor should not care, if you sent his equipment ammonia vapor, then it would only have to add sensible heat. His concern is meeting a pressure drop through the equipment you specified. So, assume you send liquid NH3 at 170 psia. The liquid would flash at some point through the vaporizer and come out at 160 psia (for example). Now you send 150 psia vapors, the pressure drop will increas and you'll get 120 psia vapors. If you send 50% vaporized NH3, at 150 psia, you'll get 135 psia all vapor NH3.

If you bypass the pump, you'll get your NH3 out at a pressure lower than you feed it by say 10 psi versus at a pressure 5 psia lower than the pump output.

 

[MAPower]

Thanks for the advice. It turns out the vendor was more concerned with saturated vapor getting to their equipment downstream of the vaporizer. They also mentioned there would be a decrease in efficiency.