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1. Piping Hydraulics (PH) software, brief presentation. Software is available on the website sourceforge.net/p/phexecute. The PH software is dedicated for engineers involved in design industrial piping/pipelines. It is software tool, which could be handy calculator of pressure and temperature change along piping/pipeline. Piping can create network defined by branches and nodes with defined piping geometry/insulations and branch fluid flowrates also through branched piping. The PH software tool was established on the novel thermodynamic model of differential equations resolved using Runge-Kutta method. It allows to calculate simultaneously change of temperature and pressure along piping/pipeline with defined fluid flowrate and piping geometry including possible loss/gain of heat to the ambient. Piping/pipeline can be surrounded by ambient air, water or soil and piping/pipeline might be insulated by up to 3 layers. PH software has two build-in tools for automatic fluid phase identification (gas, liquid or two-phase flow) and associated fluid properties, e.g. density, viscosity, etc., calculation. Piping can be supplied with external heat source (steam or electric tracing). It also allows introducing ambient air, water or soil temperature along piping.