Actions on Materiality
Customer Health and Safety (FY2017 Report)
Reasons why materiality is important for our business.
The Daigas Group puts the highest priority on securing safety of gas supply and facilities as an energy business operator which supplies city gas to 7.34 million customers. Therefore, we consider it important that we make efforts to enhance the safety level and formulate a structure to respond possible accidents and disasters.
Inside of the Group
Management systems and its performance
Osaka Gas is committed to ensuring the safety of city gas, our primary product, its secure supply, and safety of gas facilities — all by formulating "Gas Supply Clause" and "Security Rules" in line with the Gas Business Law.
(International and domestic standards)
- Gas Business Law
(In-house policy and standards)
- Daigas Group Code of Conduct
- Gas Supply Clause Security Rules
The Daigas Group has established a system to ensure the safety of city gas and gas appliances in all fields of its city gas value chain — processing, supply, and sales and consumption in the corresponding business units. The "Head of Safety" (Vice President) and the person heading each Business Unit's safety operation offer advice on inter-section and inter-district security.
The Vice President in charge of safety operations, the person in charge of safety operations at each Business Unit and the chiefs of the relevant departments — who together constitute the Executive Safety Council — convene a regular safety and security meeting (five times per year) to work out safety activity plans and assess the achievements made in the relevant term. Efforts to ensure and enhance the safety of the city gas supply and gas appliances are also being planned and conducted at each Business Unit.
Organizational Structure Aimed at Promoting Security and Safety
In fiscal 2017, every procedure is conducted based on guidelines in accordance with laws and regulations as well as in-house rules in the processes such as quality control of gas in LNG terminals, safety inspection of gas pipelines and supply facilities, as well as gas appliances at customers consented.
Specific actions taken regarding materiality
To allow customers to receive our energy service without worry, we are working on maintaining the quality of city gas being supplied at high levels while ensuring stable gas supply and the safety of gas-processing and supply facilities.
Journey of City Gas - from Gas Fields to End-users
Inspection of gas pipes
Gas supply facilities including pipelines and pressure regulators were inspected to ensure their safety. The frequency and content of such inspections are set under in-house "Security Rules."
Securing safety at customers' sites
Facilitate systems to response to reports and prepare resources for dispatching in case of accidents and disasters 24 hours a day, 365 days a year.
In accordance with laws, inspection of gas appliances for gas leaks, gas water heaters for air supply and exhaust function at customers' sites at least once every four years (at least once a year for some customers) were conducted. The visits to the customers were exploited as the opportunity for recommending installation of alarms for gas leaks for residential use and ventilation for commercial use, of which penetration rate were 52.5% and 99.2%, respectively.
We are conducting replacement of old gas pipes with new ones that are resistant to earthquakes and corrosion. We are actively proposing the renewal of corrosion-prone old gas pipes by contacting affected customers. In fiscal 2016, we implemented measures to deal with old gas pipes made of gray cast iron, which had been required to be replaced under government instruction — far ahead of the initial schedule of fiscal 2021.
Preparation for disaster prevention
From our experience of the earthquake occurred in Kobe, we have made every effort to prevent disasters incurred by earthquakes. Those efforts include enhancement of safety function and measures in LNG terminals, replacement of old gas pipes with polyethylene pipes (approx. 15,500 km installed), installation of intelligent meters that detect vibrations from the earthquake and shut off the gas supply, of which penetration rate reached 99.8%. Seismoscopic automatic gas shutoff devices set up in approx. 3,000 places in our gas supply area is one of measures to prevent secondary damage from earthquake.
We have been redoubling our efforts to fend off possible damage from tsunami following the March 2011 disaster that struck northeastern Japan. For example, we have strengthened stand-alone in-house power-generation facilities installed at LNG terminal buildings, improved the watertightness of the buildings and facilities at the terminals, and moved part of the terminal facilities to higher locations to avoid tsunami waves. In addition, we have established systems to ensure the operation of gas-supply facilities under any circumstances. Among such systems is a damage-reduction block system, which controls the gas supply of medium- and low-pressure gas pipes installed in coastal areas. The block system is designed to prevent secondary damage and facilitate the early recovery of gas supply. In addition to these anti-tsunami measures, mainly involving improvement on the hardware front, we are taking steps on the software front, such as the holding of company-wide disaster drills and training. We expect these disaster-prevention efforts to establish robust and resilient value chain in city gas service.
[The figures are those compiled as of the end of March 2017.]
Security Measures Prepared for a Major Earthquake
|Security Measures Prepared for a Major Earthquak||Status of implementation (as of the end of March 2017)|
|(1) Reinforcement of an information collection function||Installation of seismograph||Installed in all areas (258 locations)|
|Introduction of an earthquake damage prediction system||Installed at the Central Control Rooms (Head Office and Kyoto sub-center) and in five regional business locations|
|(2) Building of a supply shutoff system||Subdivision of supply blocks||Divided into medium-sized blocks (85) and small blocks (159)|
|Introduction of supply shutoff devices||Remotely controlled supply shutoff device: 3,503 locations
Automatic supply shutoff device that is triggered in the event of a tremor: 3,003 locations
|(3) Others||Efforts to diffuse polyethylene (PE) pipes||PE pipes to be used for all new low-pressure pipelines,
in principle Total extended length of PE pipes: about 15,500 km
|Diffusion of an intelligent meter that detects earthquake vibrations||Installation completed for household-use devices; the diffusion rate of all devices, including business-use devices, stands at about 99.8%|
|Mechanism to back up important online systems||Establishment of a backup center|
Securing safety of city gas
At LNG terminals, quality of gas is monitored on a daily basis to be in accordance with the criteria determined in our guidelines based on the law. The amount of gas in the gas holders and pressures in gas pipelines are monitored in real time in the control rooms.