... up the liquefied ,which is the special-purpose vehicles(For example propane ,propylene,liquid ammonia,liguid nitrogen,liquid hydrogen,liquefied netural gas , liquid state ... tie-inNominal pressurePN2.5MpaNominal DiameterGas phaseDN25mmSurveying range02400mmLiquid phaseDN50mmPrecision2.5 Grade liquefied petroleum gas tank truck