There was a fire occurred in the one of the middle east country main sewer pumping line(above ground )
the pipe material is HDPE 800mm dia 47mm thick while doing the pumping process, pipe is full of sewage water
sewage concentration is less, aftermath of fire, the air sample shown no flammable or natural gas presence. fire was engulfing
for 60 mins and put off by fire brigade in 5 mins, no combustible materials found in the vicinity of fire
what could the possible source of fuel for fire growth? ignition source is found to be electrical cable.