Products @ D&D Mining Limited Flame proof requirements All equipment offered by D&D Mining Limited can be supplied in a flame proof condition that will enable the machine to work in a gaseous environment. Be it deep mine conditions, or surface(civil) works with a gas problem, heavy surge etc. Our machines can be fitted with gas monitoring equipment that will render the machine to stand down in the event of gas being higher than safe working levels pre set by the client. We can also provide the client with hand held monitors to enable random readings to be taken.