Combustion engineers are continously involved with the flow of fuel, wether it be gas or oil through pipelines, pipeline components, valves, fuel jets and orifices.

It is important to have an understanding of the factors that govern flow so that pipeline sizes, valve sizes, fuel jets and orifices can be sized correctly so as to result in optimum performance of plant and economy of installation.

It is necessary to understand the relationship between resistance to flow and the various physical properties of the fuel, such as viscosity, temperature and relative density.

This web page provides information with regard to the derivation of flow formula for orifices, and pipelines

Tables are provided for flow through, gas orifices and pipelines for various fuels and gases.

Many industrial processes involve the flow of process air or products of combustion through ductwork, tubes and flues, information with regard to the flow of ambient and hot air through ducts and the flow of hot gasses through tubes is necessary.

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  Gas & Air Flow

  Derivation of Orifice Gas Flow Formula
  Gas Orifice Tables


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Comtherm Limited accepts no responsibility or liability for the accuracy of information provided on this web-page. technical data and dimensions should be confirmed with the relevant Comtherm Limited Sales or Technical office.