It is impossible to get a new gas connection without a Ration card.It is because Ration card submitted by us is used to verify our address ie;Proof of address.Gas connections for different customers is different ,for household it is 14.5 kg and for domesctic purposes it is 25 kg cylinder i think.
If you have a good neighbor then You can speak with them to make some adjustments and With their Ration card we can get a new connection.This is only way i think.