Profile: Midland Fire Ltd. specializes in providing fire extinguishers, fire protection equipment, fire risk assessments, fire clothing and accessories. ABC Dry Powder Fire Extinguishers are suitable for; Wood, Paper, Textiles, Flammable Liquids, Electrical and gaseous fires. Epoxy polyester coated cylinder for corrosion protection and polythene lining to protect from internal corrosion. We are an ISO 9001:2008 certified company. An over-haul is a hydraulic test; this means that the body of the extinguisher is filled with water, the extinguisher is then pressured to double it's normal working pressure and then it must survive a 40ft drop test.