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| NATURAL GAS SUPPLY CONCEPT |
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| Our natural gas supply is sourced from PETRONAS via PGB’s PGU pipeline. The
natural gas is supplied to us through the City Gate Stations. Mainly, at each City Gate Station, there is an odoriser station that injects odorant into the natural gas to odorise it as part of safety requirements. From here on, the natural gas is distributed throughout our NGDS via feeder lines and distributions lines located throughout Peninsular Malaysia. Depending on the volume and pressure of natural gas required, the pressure in these pipelines is reduced at either district stations, service stations, area stations or regulating stations. Once the gas pressure has been reduced to the appropriate level, it is delivered to the customer’s internal piping system.
The delivery of natural gas, from the city gates to our customers via our NGDS is depicted in the operation process flow below:
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Gas Supply Schematic |
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Peninsular Gas Utilization (PGU) |
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| The PGU project which commenced in 1984 is the longest in Malaysia spanning more than 2,500km. It comprises main gas transmission pipelines, supply pipelines and lateral pipelines. The system comprises six gas-processing plants with a combined capacity of 2,000 million standard cubic feet per day (mmscfd), producing methane, ethane, propane, butane and condensate. The PGU is owned by PETRONAS and operated by PGB. |
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City Gate Station |
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| Stations with pressure-regulating and gas metering facilities, and are located just off the Peninsular Gas Utilisation pipeline owned by PETRONAS. This in turn link up to our NGDS where the gas pressure of 500 - 800 psi is reduced to 260 psi. They act as transfer points for natural gas between our NGDS and the PGU. There are 36 City Gate Stations across Peninsular Malaysia. |
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Odoriser Station |
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| Station with an odorant dispensing facility located immediately after City Gate Stations. This is where an odorant such as mercaptan is injected into the gas to odorise it so as to meet safety requirements. As natural gas is colourless and odourless, the odorant is added to provide a distinctive odour to the gas to enable readily detection of leaked gas in the environment. |
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Feeder Line |
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| This gas pipeline is made of carbon steel. It distributes natural gas at the pressure of 150~260 psi from the City Gate Stations to the service line of District Stations and Service Stations. These pipes usually reside on the Government’s road reserved. |
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District Station |
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| Stations with pressure regulating facility, where the natural gas pressure from the Feeder Line is reduced from 150~260 psi to 50 psi before entering the Distribution Line. |
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Distribution Line |
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| This gas pipeline is mainly made of polyethylene. It distributes natural gas at the pressure of 35~50 psi from the District Stations to the service line of Area Stations, Regulating Stations and Service Stations. These pipes usually reside on the Government’s road reserved. |
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Service Station |
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| Stations with pressure regulating and gas metering facilities where the natural gas pressure mainly from either the Feeder Lines or the Distribution Lines is reduced to the appropriate level before being supplied to industrial and commercial customers. They act as transfer points for natural gas between our pipelines and the customer’s internal piping system. |
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Regulating Station |
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| Stations with pressure regulating facility where the natural gas pressure from the Distribution Line is reduced from 35~50 psi to 4.3 psi before being supplied to commercial customers. |
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Area Station |
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| Stations with pressure regulating facility where the natural gas pressure from the Distribution Line is reduced from 35~50 psi to 0.43 psi before being supplied to residential customers. |
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