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Quadvent 2


Building on the success of the original Quadvent - a software tool that accurately calculates the gas cloud volume Vz for the classification of hazardous areas - HSL is pleased to announce an updated and improved version: Quadvent 2.

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What is Quadvent 2?

Under the requirements of the Dangerous Substances and Explosive Atmospheres Regulations 2002, an organisation must identify and classify areas of the workplace where explosive atmospheres may occur.

Historically, the gas cloud volume Vz required for area classification had to be estimated using a methodology defined in BS EN 60079:10-1 (2009).
This methodology has no basis in science and has frequently been shown to produce unnecessarily conservative results.

In 2011, HSL developed a scientifically-based mathematical model of a flammable gas jet to provide more realistic estimates of Vz for releases of flammable gases in ventilated enclosures or outdoors.

This model formed the basis of Quadvent, a quick and easy-to-use software tool which calculates Vz for any situation in which the flammable gas cloud volume or extent of the flammable cloud needs to be determined for a release of pressurised gas.

Quadvent 2 is a new, updated product which improves on its predecessor by allowing for a wider range of applicability including different fluid types and an improved interface. The software now includes a model for buoyant gas releases and pressure liquefied gases, such as LPG.


Request  a FREE demo of Quadvent 2 by emailing or buy now


Who is Quadvent 2 for?

Quadvent 2 is aimed at any industry that routinely handles or stores flammable gases including natural gas, hydrogen, LPG, propane, butane, ammonia or refrigerants, and many others.


The benefits of using Quadvent 2

As an alternative to estimating the flammable gas cloud volume by using the method described in BS EN 60079:10-1 (2009), Quadvent 2 provides the following benefits:

  • The software is quick and easy-to-use
  • Realistic Vz estimates save the capital and maintenance costs of unnecessarily protecting electrical and non-electrical equipment for use in hazardous areas
  • It uniquely calculates Vz both for ventilated enclosed areas and for outdoors
  • The software has been rigorously tested and validated against detailed gas release data to ensure its reliability as a tool for hazardous area classification
  • Quadvent 2 can realistically estimate the natural ventilation rate of a building
  • Mathematical models have been added to cover a variety of gas and liquid release scenarios including gas jets, flashing releases and plume releases
  • The software features a comprehensive help system and is supported by specialist training and consultancy services from HSL


Request  a FREE demo of Quadvent 2 by emailing or buy now


Hazardous Area Classification Training and Consultancy

Established more than a century ago specifically to investigate explosive industrial conditions, HSL is now a world authority on the subject and is frequently consulted on the prevention of accidental explosions.

Building on this unique knowledge and experience, HSL has taken a leading role in the development of appropriate, scientifically-based approaches to hazardous area classification.

HSL provides regular training sessions on DSEAR and hazardous area classification, including the use of Quadvent 2, at our facility in Buxton, Derbyshire. HSL can also deliver bespoke training and consultancy relating to hazardous area classification and associated matters at the client's own site.


Quadvent 2 Product Details

Quadvent 2 is sold as either a perpetual or annual licence and is supplied electronically as a downloadable installation package.


Request  a FREE demo of Quadvent 2 by emailing or buy now

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