I was pleasantly surprised to see that we can link either Aadhar Card or Bank Account Number with LPG Gas Connection online
Of late, I've been receiving SMS from my LPG provider to link my Aadhar number or Bank Account with my LPG Gas connection. Came across this link by Ministry of Petroleum and Natural Gas
This link contains details as how to register your Aadhar Card/Bank account for any of the below Gas Company.
Linking Aadhar Card Number with LPG Gas Connection:
Follow the link below to link your Aadhar card number with any of your LPG Gas connection. However be sure that you've linked your bank account with your Aadhar Card.
Linking Bank Account with LPG Gas Connection:
Navigate to http://petroleum.nic.in/dbt/index.php
and follow the procedures mentioned there.
Ram Kishore K