what penal action imposed on gas agency owner.

File a claim under the provisions of Employees Compensation Act, 1923

The employee is eligible for compensation, and I am not aware of penalizing any employer for the actions of labor while performing his duties.  There must be negligence or lack of security precautions to proceed against AN employer. .  Please contact the Labour inspector of the area, whose address must be displaced in workplace/office.  You can also search the address either in BSNL or any Yellow pages.  Contacting any Labour Union Official locally helps you in understanding the remedy through compensation.

It depends on the specific facts of the case. How the accident happened. What were the safety precautions that are required to be taken by the Employer while handling the Gas Cylinders, whether the Employer implemented/followed the same.