Sun. Jun 20th, 2021

City gas distribution

Transporting future fuel

#11 PNG – Piped Natural Gas

4 min read

Natural Gas is mainly Methane – CH4 with a small percentage of other higher hydrocarbons. The ratio of Carbon to Hydrogen is least in methane and hence it burns almost completely making it very environment friendly. It is procured from the oil/gas wells and transported through a network of pipelines.

PNG (Piped Natural Gas) is the natural gas supplied through mild steel (MS) and polyethylene (PE) pipelines to cater to the natural gas demand of customers in various segments, i.e. Domestic / Commercial & Non – Commercial / Industrial segments.

PNG is not stored at one place but is continuously supplied through the pipeline from the source.

Natural Gas catches fire only when it forms a 5-15% mixture with air whereas LPG catches fire when it forms 2% or above mixture with air. Our supply designs, executions and operations are being done as per International best Practices. Natural gas is lighter than air. Therefore, in case of a leak, it just rises and disperses into thin air given adequate ventilation. But LPG being heavier will settle at the bottom near the floor surface. A large quantity of LPG is stored in liquefied form in a cylinder. With domestic PNG, it is safer since PNG installation inside your premises contains only a limited quantity of natural gas at low pressure i.e. 21 millibar (mbar).

As Natural gas is odorless Ethyl Mercaptan is added to detect any leakages. For CNG odorant is added in the Mother station and for PNG odorant is added at the source of supply.

Few benefits are as under:

Uninterrupted Supply: PNG is being supplied through pipe 24X 7. PNG offers the convenience of ensuring continuous and adequate supply of PNG at all times, without any problems of storing gas in cylinders.

Convenience: Since the supply of PNG is continuous, the domestic consumers are relieved from the task of booking an LPG cylinder and waiting for the delivery man for delivery. Further, there is no storage space required. In the case of Commercial and Industrial consumption, the customer is relieved from storage space for fuel and fuel inventory management as they don’t need to monitor the fuel stock and material handling.

Safety: Natural Gas is a safe fuel. In case of leakage, NG being lighter than air, disperses in the air.

Economy: PNG is economical to LPG and any other liquid fuels. Further in the case of PNG, billing is normally after a cycle of fortnightly /monthly /quarterly after the use by the consumer whereas the consumers pay upfront for any other fuel used by them. Thus there is savings on account of release of working capital for the commercial and industrial sector and deferment of expenses for the domestic sector.

Eco-friendly fuel: PNG is one of the cleanest burning fuels, and helps improve the quality of air. When natural gas burns completely, it gives out carbon dioxide and water vapor. These are the very components that we give out while breathing!

Natural GasMethane
Chemical FormulaCH4
Energy Content: MJ/m338.7
Energy Content: Btu/ft31011
Energy Content: MJ/kg52.5
Boiling Temp: Cº-161.5
Flame Temp: Cº1950
Flame Temp: Fº3542
Gas Volume: m3/kg1.499
Specific Gravity0.5537
Density @15ºC: kg/m30.668

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