As you asking for the contact details of the Refinery / plants of Hindusthan Petroleum Corporation Limited the contact details are as follow


Mumbai Refinery
Bhikaji Damaji Patil Marg, Old Corridor Road, Mahul, Mumbai - 400074 ,
Mumbai , Maharashtra , Mumbai , 400074
Contact No : 022 25076000


Visakh Refinery
P.B. No. 15, Malkapuram, Visakhapatnam , Visakhapatnam ,
Andhra Pradesh , Visakhapatnam , 530011
Contact No 0891 2895000 & 2895100


for knowing the contact details of the any offices or centres of the Refinery / plants of Hindustan Petroleum Corporation Limited you may go to the official site of the Hindustan Petroleum Corporation Limited

The page may look as follow



There at the right of the page you may get the Menu of contact us click on it After clicking you may redirect to the page from there you may get the details of the any other offices of the HPCL

For your convince here I Am giving you the Snapshot of that page