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pressure regulators in series

pressure regulators in series

pressure regulators in series

(OP)
I have often been told that, in a wet gas system, taking a two step pressure drop (two regulators in series) will reduce hydrate formation tendencies over a single regulator.  An example would be a 100 compressor fuel gas system with supply gas at 1000 psig.  Installing two regulators; 1000 to 375 and 375 to 100 psig, would result in less hydrate formation tendency than a single 1000 to 100 psig drop.  There is no intermediate heating, and only about 12" of pipe.  Why is this advantageous.  I was told that it reduced the Joules-Thompson effect.  I thought the Joules-Thompson effect is simply the cooling resulting from the Gay-Lussac's Gas Law (P/T = P/T).  Help.  I'm feeling stupid.

RE: pressure regulators in series

Have a look at thread798-125227 for a good discussion on the J-T coeeficient.

Cheers,
K.

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