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54
Sustainability Report 2011
The Safety of our Gas Infrastructure
Hong Kong
The commitment and effort we put into the safety and reliability of our gas systems
and infrastructure mean that our customers in Hong Kong enjoy highly secure gas
supply networks with a supply reliability of 99.99%. However making sure that these
systems not only perform, but are certified, to the highest global standards, we have
implemented the PAS 55 certified Asset Management System throughout our gas
production plants, transmission and distribution networks in the territory. PAS 55, the
British Standard Institution’s Publicly Available Specifications, not only certifies the
safety of our infrastructure and network, it also provides a checklist to guarantee proper
systems operation.
Our plant, equipment, network and processes are also regulated by the Electrical and
Mechanical Services Department (EMSD) on behalf of the Hong Kong government.
Working in close partnership with EMSD, a mutually agreed Strategic Plan includes a
facilities utilisation as well as a preventive maintenance index to ensure the highest
standards of safety.
The safe operation of our network rests in the hands
of our sophisticated Supervisory Control and Data
Acquisition (SCADA) System. Together with a Remote
Control, Emergency Logging and Geographical
Information System, it not only monitors and controls
the smooth operation of our network, it also improves
our ability to track down and deal with emergencies
both quickly and effectively.
We carry out a rigorous schedule of inspections for our
pipeline network, completing 167,053 inspections at
16,533 sites and surveying about 7,000 km of pipelines
in 2011. Using an advanced electronic inspection tool, a major “fingerprint” inspection
of the 34 km twin natural gas high-pressure pipeline that links the Guangdong LNG
Terminal to our Tai Po production plant was also completed during the year.
These activities are aided by the most up-to-date equipment and technologies, our
Riser Inspection Robots being a prime example. These “robots” combine digital imaging
and gas leakage detection equipment carrying out routine preventive maintenance for
service risers in difficult, remote and hard to access areas. In our underground network,
with an ongoing programme to replace older pipelines with more modern and durable
materials, we are seeing greater security overall in our pipeline network.
Safety Performance The Safety of our Gas Infrastructure