A person while cutting a line with angle grinder, the gas inside the line exploded on the face causing burn injuries on the face and forearms. Wearing goggles and hand gloves saved the person from more injuries. We heard earlier, hot work i.e welding on the pipe lines / tanks caused explosion (due to heating of contents inside and building up the pressure). In this case, possibly, after the line is cut, the escaping gas would have ignited from the sparks of grinding job.
Demolition Job Explodes in Workers’ Face » SafetySmart
LINK