hi experts This ought to be obvious but it sounds wrong. If I have a pipe carrying butane at a constant flow rate at room temperature fed from a liquid gas bottle without a restrictor so that the gas is almost condensing, then have a constriction in the pipe to accelerate the gas, will the drop in pressure caused by acceleration cause the gas to condense ? This is a purely theoretical question so no actual gases will be used. Just interested to see if gases can be condensed this way. Many Thanks bitman Read an earlier thread on this forum re carburettor icing but it wasn't clear if this was the reason.