What diameter for compressed air?
If the hose is too long or too narrow, the pressure leaving the compressor may drop when arriving at the gun. It is important to use a hose with a diameter of at least 0.65 cm. One diameter of 0.8mm or 0.9mm is recommended.
The tubing ofpressurized air aluminum are the best solution to most industrial applications. These tubing ensure that you have virtually no pressure drop.
For the use of a impact wrencha chipping hammer or other device with high air consumption, you must use a pipe of air with an internal diameter of 10 to 12 mm, connect it to the direct outlet of the compressor tank and imperatively use all along the connection chain of the tips and …
This nominal diameter is deduced according to the flow rate of the fluid to be conveyed and the admissible speed in the pipe. Often another parameter can intervene, it is the loss of load (evolving with the square of the speed). Steam condensates < 1 m/s Note that in the case of industrial pipes, the flow is considered to be continuous.
The maximum speed of a fluid in a conduit is therefore determined by the pressure drop it causes. This “allowable” pressure drop so that the duct is not noisy or generates additional operating costs (energy and pumping) must remain less than 20 mm/m of linear pressure drop. (for liquids)
c) Consider a pipe delivering steam at a rate of 2000 kg/h at an effective pressure of 15 bar and at a temperature of 325°C. Starting from the t° (325°C) via the effective pressure, the mass flow rate and the flow velocity, we obtain the dn = 155 mm or the normalized dn = 200 mm.
The diameter of the ducts is generally the desired dimension. For non-circular ducts, with rectangular or oblong sections, the equivalent diameters, isokinetic diameters or hydraulic diameters are used.