Sustainability Report 2012 • 41
Hong Kong
While the safety and reliability of our gas systems
and infrastructure have reached a high supply
reliability rate of 99.99%, we nevertheless
continue to ensure that these systems not only
perform, but are certified, to the global standards.
As such, we have implemented the PAS 55-1
certified Asset Management System throughout
our gas production plants, transmission and
distribution networks in the territory. PAS 55-1,
the British Standard Institution’s Publicly Available
Specifications, not only certifies our management
system for the safety of our infrastructure and
network, it also provides a checklist to guarantee
proper systems operation. Our HSE Policies also
conform to ISO9001, ISO14001 and OSHAS18001
standards.
Our plant, equipment, network and processes are
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 high standards of
safety.
The Safety of our Gas Infrastructure
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 our network, it also
improves our ability to track down and deal with
emergencies both quickly and effectively.
In addition to the safety management provided
by SCADA, we also carry out a rigorous schedule
of inspections for our pipeline network,
completing 176,688 inspections at 17,599 sites
and surveying over 7,000 km of pipelines in 2012.
These inspections, together with our ongoing
programme to replace older pipelines with more
modern and durable materials, contribute to the
high levels of security in our pipeline network. In
2012, the number of third party damage incidents
to our gas pipes fell to 12 against the 15 recorded
in 2011. We also experienced the lowest number
of Public Reported Gas Escapes (PREs) on record
with 54 reports while there was a total of 330 gas
leakage reports during the year.
Type of Pipeline
Frequency of Leakage Survey
All high pressure and intermediate pressure mains
At least once a year
Medium pressure ductile iron pipes or all galvanised iron pipes
At least six times a year
Low pressure ductile iron pipes
At least three times a year
Polyethylene(PE) or steel pipes over or enclosed within structures At least twice a year
Others
At least once a year
Leakage and Pipeline Surveys
