Hindustan Petroleum Corporation Limited (HPCL) is a type of an Indian state-owned oil and natural gas company.
It was formed in the year 1974.
It's headquarter is located in Mumbai, Maharashtra India.

As you have asked about the address of the Hindustan Petroleum Zonal office in Egmore, Chennai, I am giving you information about it, check below for the details

South Zone
Zonal Operations-South Zone
HPCL, Office of General Manager-South Zone,
Thalamuthu Natarajan Building - 4th Floor, 8-Gandhi Irwin Road,
Egmore, Chennai - 600008, Tamil Nadu

Products:

It offers following products:

Petrol
Diesel
Lubricants
Liquified petroleum gas:
Aviation Turbine Fuel
Bitumen
Emulsion