Abstract: The minimum ignition energy test standards at home and abroad were compared. The structure, test principle and method of the minimum ignition energy test device for spherical flammable gas established in accordance with ASTM E582-07 (2013) were introduced. The experimental study on methane, propane (R290) and ethylene was carried out, and the reliability of the device was verified. There lationship between electrode gap and quenching distance was analyzed and effects of electrode gap, initial temperature and initial pressure on the minimum ignition energy were analyzed too.

Key words: flammable gas, minimum ignition energy, R290, sensitive gap