2.4 Coanda Flares

Installed Coanda flare tip

Installed Coanda flare tip

Our Coanda flare tips are a vast improvement on others available on the market.  We have worked with numerous end users to extend the service life of their Coanda flares and can offer a selection of enhancements that will provide the operator with excellent flare life time to compliment the technical advantages of this type of flare tip.

The tip is specifically designed to achieve very low radiation and directional flaring whilst still meeting acceptable noise levels.  They typically operate at pressures up to 5.0 barg, and provide a good reliable method of high pressure gas disposal whether by venting or flaring.  Our Coanda flares provide the operators with a robust and reliable flare tip that will typically exhibit long life time.  We can supply new bespoke flare tips or refurbishments of other OEM flares to suit the operator’s specific platform or site conditions.

Flare Tip

The standard flare tip body and cone section is fabricated in heat resistant 316L SS, 310S stainless steel, Alloy 330 or 800H materials.  Upgrades to higher heat resistant materials are also available when the operating conditions are more onerous than normal.

Coanda Technology

Our Coanda flares use the Coanda effect to entrain and mix air into the hydrocarbon gas stream.  High pressure gas exits radially from the annular slot at the base of the tulip.  It adheres to the Coanda profile and is directed through 90 degrees, entraining up to 20 times its own volume of air in the process.  Flame initiation takes place just above the maximum diameter of the cone section, ensuring reliable ignition of the gas by external pilots.  Smokeless, low radiation combustion is achieved without the need to introduce utility steam or air.

Coanda Benefits

Additional benefits of using our Coanda flares are noted below:

  • Improved turndown and smokeless capability when using a variable orifice type
  • Produces a flame that is not easily deflected by cross winds
  • Can be rotated and angled in order to “throw” the flame away from point locations where radiation is a concern
  • Flame stability is excellent and the Argo Coanda flare functions perfectly well with or without pilots, although we would always recommend using suitable pilots on any flare
  • It is capable of burning significant quantities of liquid carryover for both short term and long term without any fall-out (flaming rain)
  • The efficiency is such that low pressure (LP) gas may be fed into a central duct of the flare and flared smokelessly within the main high pressure gas flame

Get longer lasting and better performing Coanda flares from us

Coanda Life

Please contact us for further details of how we can increase the life time of your Coanda flare tip.

Pilots and Igniters

The flare tip is normally fitted with pilots manufactured in heat resistant steel, incorporating a nozzle designed for maximum pilot flame stability, an inspirator assembly for regulating the air and gas mixture to the pilot and the igniter which fits into the nozzle directly. An interface flange is typically provided on the pilot inlet piping for connection to the fuel gas pipe manifold. The tip is equally capable of being ignited with a Flame Front, High Energy, High Tension or Pellet type ignition system.

Typical Coanda Tulip Flare Information

 Bowl Diameter

8” NB

20” NB

33” NB

45” NB

58” NB

70” NB

 Typical Qty Pilots

1 or 2

2 or 3





 Typical Weight (kg)







 Typical Fuel Gas Purge Rate (Nm³/h)







 Typical Nitrogen Purge Rate (Nm³/h)







 Typical Capacity (kg/h)*







* Typical capacity at 5.0 barg tip back-pressure with a molecular weight of 25 kg/kgmol and an operating temperature of 30ºC.