Ahmedabad: The state public sector undertaking (PSU), GSPC Gas has hiked piped natural gas (PNG) prices by 30 per cent and compressed natural gas (CNG) prices by 10 per cent. Citing non-allocation of cheaper natural gas from the Union government as the reason for the hike, GSPC Gas Company (GGC), a subsidiary of GSPC, revised PNG prices from Rs 16.91 per standard cubic meter to Rs 20.91 per scm and CNG from Rs 45.25 per kg to Rs 50.20 per kg. The revision of PNG prices will be for domestic users.