I spend most of my time working in the area of DSEAR. I know of no software that does hazard zone calculations as such.

I have developed an Excel spreadsheet that calculates the various formula in BS60079-10-1, instead of doing such calculations manually.

As Ian has said, the normal way to do it (if you are using a calculation method) is just to develop a spreadsheet to simplify the calculations and avoid errors.

But don't restrict yourself to calculations. There is little agreement as to the validity of any single calculation or modeling method. Different calculations / methods give different results for the same conditions and no single calculation/method has been found to best represent the 'actual' zones for all materials / conditions.

I personally prefer a 'standard zoning' for recognsied guidance approach. These do require validation in terms of ensuring the basis forthe /zoning are met, but have a greater safety margin (give bigger Zones) but in most cases do not impose excessive demands in terms to the need for EX-rated items. It also allows for the use of specific industry guidance like IGEM (for natural gas) and BAMA (for areosols). I must admit I'm a bit wary of using the LPGA guidance in some cases.

Hope it helps

Thank you, looks like I am either best creating my own spreadsheet calculations or getting someone in, depending on cost / time.