India's Shift to Piped Natural Gas: A Comprehensive Analysis

Understanding the distinctions between LPG, LNG, PNG, and CNG is crucial for evaluating India’s energy transition strategy. LPG (Liquefied Petroleum Gas) is a mixture of propane and butane obtained as a by-product of crude oil refining and natural gas processing. It is stored in liquid form under moderate pressure and widely used for domestic cooking due to its portability in cylinders.

LNG (Liquefied Natural Gas), on the other hand, is natural gas cooled to around –160°C, reducing its volume by nearly 1,000 times. This makes it suitable for long-distance transportation via specialized carriers. After reaching the destination, LNG is regasified and distributed through pipelines. PNG (Piped Natural Gas) is simply natural gas supplied directly to households through pipelines, offering convenience and continuous supply. CNG (Compressed Natural Gas) is natural gas compressed at high pressures (200–250 kg/cm²) and is primarily used as a cleaner vehicular fuel.

The physical properties—such as energy density, compressibility, and storage requirements—determine their applications. For instance, LPG’s ease of storage makes it ideal for rural areas, while PNG’s continuous flow suits urban households. Similarly, LNG’s transport efficiency supports global trade, and CNG’s low emissions make it suitable for transportation. Thus, each fuel serves a distinct niche within the broader energy ecosystem.

India’s push for PNG over LPG is driven by a combination of energy security, economic, and logistical considerations. A key factor is import dependence. India imports nearly three-fifths of its LPG requirements, with a large share historically routed through geopolitically sensitive regions like the Strait of Hormuz. In contrast, natural gas imports in the form of LNG are more diversified globally, reducing vulnerability to supply disruptions.

Economic and operational advantages also play a role. PNG eliminates the need for cylinder logistics, reducing transportation costs and leakages. It provides uninterrupted supply and can be metered, ensuring transparent billing. Additionally, domestic natural gas production has the potential to support a large number of connections, making PNG a more sustainable long-term option.

Policy push is another critical factor. The government has introduced regulatory measures, such as restricting households from holding both LPG and PNG connections and setting ambitious targets like 12 crore PNG connections by 2034. This reflects a strategic shift toward building a gas-based economy, improving urban energy efficiency, and reducing reliance on imported fuels.

The supply chains of LPG and PNG differ fundamentally in terms of infrastructure, logistics, and delivery mechanisms. LPG involves a multi-stage physical distribution process. After production during refining or gas processing, LPG is liquefied, stored, and transported via ships to importing countries. It is then bottled into cylinders and delivered to households through trucks and local distributors.

In contrast, PNG relies on a continuous pipeline-based system. Natural gas is either produced domestically or imported as LNG, which is then regasified at terminals. From there, it flows through trunk pipelines and city gas distribution (CGD) networks directly to consumers. This eliminates the need for intermediate storage and manual handling.

Implications of these differences are significant. LPG’s cylinder-based model is more flexible and suitable for areas without pipeline infrastructure, especially rural regions. However, PNG offers greater efficiency, safety, and convenience in urban areas. For example, cities like Delhi and Mumbai have successfully implemented PNG networks, reducing dependence on cylinder delivery systems. Thus, while LPG excels in accessibility, PNG represents a modern, infrastructure-intensive energy delivery model.

Natural gas has strong potential to replace LPG in many applications, but a complete substitution is neither immediate nor universal. From a technical standpoint, PNG can act as a drop-in replacement for LPG in domestic cooking, as differences in energy output are minimal in practical usage. This makes the transition relatively smooth for households.

However, several constraints limit full substitution. Infrastructure remains the biggest challenge—pipeline networks are unevenly distributed, with large parts of central, southern, and northeastern India still uncovered. Additionally, LPG’s portability makes it indispensable in rural and remote areas where pipeline connectivity is not feasible. In industrial applications, switching from LPG to natural gas may require equipment modifications, increasing costs and slowing adoption.

From a strategic perspective, even if India achieves its target of 12 crore PNG connections, over 20 crore LPG connections will remain. This indicates that LPG will continue to play a significant role. Therefore, rather than complete substitution, a complementary approach—where PNG dominates urban areas and LPG serves rural regions—appears more realistic and sustainable.

Expanding PNG infrastructure in India faces multiple structural and administrative challenges. One of the most pressing issues is last-mile connectivity. Even in cities where trunk pipelines exist, extending connections to individual households is difficult due to congested urban layouts, lack of coordination with local authorities, and delays in obtaining permissions and NOCs.

Regional imbalance is another major concern. The existing pipeline network is concentrated in western and northern India, with limited penetration in central, eastern, and northeastern regions. For instance, while areas near GAIL pipelines in Maharashtra or Coimbatore are witnessing expansion, many tier-2 and tier-3 cities remain unconnected despite being included in CGD licensing rounds.

Institutional and economic barriers further complicate the situation. Around 90 licensed geographical areas are still not connected to the main trunk pipeline. Additionally, building pipelines requires significant capital investment and long gestation periods. These challenges highlight that infrastructure expansion is not merely a technical issue but also involves governance, financing, and coordination complexities.

Scaling up natural gas usage in India depends on a combination of supply-side and demand-side factors. On the supply side, domestic production capacity is critical. Current projections indicate that to support around 13 crore PNG connections, India would need to increase its natural gas production by at least one-third. Developments such as ONGC’s KG-DWN 98/2 block, which is expected to boost output significantly, are steps in the right direction.

Import dependence and infrastructure readiness also play a crucial role. India has multiple LNG import terminals, but its gas system operates on a near just-in-time basis with limited storage capacity. Any disruption in global supply chains can immediately impact availability. Moreover, expanding pipeline networks is essential to distribute imported gas efficiently across regions.

Competing sectoral demand adds another layer of complexity. Natural gas is already heavily used in fertilizers, power generation, and industries. Diverting gas to domestic cooking may require these sectors to shift to alternative fuels like naphtha or furnace oil. Thus, achieving large-scale adoption of PNG requires a balanced approach that integrates production, imports, infrastructure, and sectoral priorities.