CGD (CGD)

City Gas Distribution (CGD) is India's regulated network of underground steel and medium-density polyethylene pipelines that delivers natural gas from city gate stations to domestic kitchens, commercial users, industry and CNG retail stations. The sector is licensed and regulated by the Petroleum and Natural Gas Regulatory Board (PNGRB) under the PNGRB Act, 2006, on a geographic-area basis through competitive bidding.

As of the most recent bidding rounds, PNGRB has awarded CGD authorisations covering roughly 295 Geographical Areas spanning over 98% of India's population and most of its land area. Each authorisation grants exclusivity for setting up the network and supplying gas for a fixed period — 25 years of marketing exclusivity for new areas, 8 years for previously bid areas — during which the licensee builds steel transmission grid, MDPE distribution mains, district regulating stations, customer connections and CNG stations to committed timelines and PNGRB-monitored Minimum Work Programmes.

For CBG producers under SATAT, the CGD network is the primary delivery channel. CBG can be either trucked in cascade cylinders to CNG stations operated by the CGD licensee or, more efficiently, injected directly into the local network at pressures matching the line (typically 4-19 bar for medium-pressure mains, up to 49 bar for trunk lines). Injection requires the CBG to meet not only IS 16087:2016 quality but also the CGD licensee's odorisation, Wobbe Index window, and metering protocols.

The trade-off for a CBG developer is location-driven. Plants within 10-25 km of a CGD trunk line can negotiate grid injection at modest incremental capex (₹3-8 crore for compressors and an injection skid). Plants further away rely on cascade truck logistics, which adds ₹4-7 per kg of CBG to landed cost and caps practical delivery radius at around 150-200 km. PNGRB has also notified Gas Exchange and open-access regulations that may, over time, let CBG producers sell directly to industrial consumers through the CGD network on a wheeling-charge model rather than only through OMC offtake — a significant structural shift worth tracking during project planning.