LPG explosion during welding inside a pipeline

While doing welding inside a pipeline below the ground level, with LPG gas cylinder outside at ground level, there was an explosion inside the pipeline. Unable to escape, four persons inside suffered burns. One person received 87% burns.

The reasons for gas leakage into the pipeline are not known. Poor quality of hoses, not following confined work procedures (like checking the flammable atmosphere, oxygen levels, having arrangement for emergency escape, buddy system), etc can be possible reasons.

The report can be read from the link below.



http://timesofindia.indiatimes.com/city/hyderabad/Four-welders-suffer-burn-injuries/articleshow/53757037.cms