Engineer freezes in factory tank

CHENNAI: A 22-year-old trainee engineer died on Friday after inhaling nitrogen in a tank at a valve-manufacturing factory in Manapakkam near Porur.
Around 8am, police said, Karuppuswamy of Tirunelveli, who had joined the company just three months ago, went to the nitrogen tank to check the temperature. His colleagues Visu Balan and Devaraj were with him when he entered the tank.
When he failed to come up after a while, the two went down and found him frozen to death. They tried to recover his body and were injured in the process. Other employees took them to MIOT hospital where the two are in the ICU.
Police registered a case of unnatural death and are investigating.
They are also looking into details of the safety norms in place at the factory. The post mortem report is awaited.