Tokyogasgroup csr report

Enhancement of Energy Security

Supply of City Gas

We are developing our natural gas pipeline network in order to ensure long-term gas supply continuity and keep pace with the growth in demand for city gas and the expansion of our service area.

Pipeline Network Development to Meet Demand and Service Area Growth

In order to realize its Challenge 2020 Vision, Tokyo Gas is pushing ahead with effectively developing its pipeline network and maintaining stability of supply so as to meet further growth in customer numbers (including residential customers), as well as extensive latent demand throughout the Kanto region (especially in industry).
Our high-pressure pipeline network was expanded by the completion of the Saito Line in October 2015, and the Ibaraki-Tochigi Line in March 2016. These connect the Hitachi LNG Terminal with our three existing terminals in Tokyo Bay, thereby improving supply stability in and around the northern Kanto region. Steady progress will continue to be made on the Koga-Moka Line linking the Saito Line and Ibaraki-Tochigi Line with the aim of completing it in fiscal 2017. We will also commence work on the Ibaraki Line being built to improve supply stability and expand transportation capacity by adding further looping to our high-pressure trunk lines. This line is expected to be completed by fiscal 2020. 
As regards training and improving the skills of the engineers required to maintain this infrastructure, in fiscal 2017 we will further step up our inspections of key supply facilities, such as high-pressure pipelines, key medium-pressure lines, and facilities for receiving gas from other companies. At the same time, we will sustain our efforts to ensure supply stability by, for example, enhancing emergency backup systems and organizing emergency drills.

Supply Infrastructure of Tokyo Gas Group
Tokyo Gas Group’s service areas and pipeline network
Click to expand the image.

Key Supply Infrastructure Expansion Plans
Purpose Name of line Section Planned entry into service
Expansion of regional infrastructure Koga-Moka Line Koga City-Moka City FY2017
Ibaraki Line Hitachi City-Kamisu City FY2020
Tokyo Gas Group’s service areas and pipeline network
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Initiatives at the Supply Control Center

The Supply Control Center centrally monitors and controls the operational status of city gas production and supply facilities in the Tokyo metropolitan area 24 hours a day and 365 days a year. Using the Group's own highly reliable wireless communication network, it gathers data on the status of city gas production and supply facilities in real time, and sends out appropriate instructions concerning the city gas output of LNG terminals, adjustment of pressure by governor stations, storage and supply by gas holders, and other operations in order to ensure that city gas services are unimpeded by periodic inspections of LNG terminals and high-pressure lines and maintenance work.

In the event of a disaster, the center gathers data, analyzes the extent of the damage, and initiates initial response action (such as discontinuation of gas service) to prevent secondary disasters. Working with the Cabinet Office and Tokyo Metropolitan Government, it shares information on damage via special-purpose communication terminals, discusses responses via teleconferencing, and works to prevent the spread of the damage.

Supply Control Center
Supply Control Center

DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Transmission Service for New Entrants to the Liberalized Gas Retail Market

We have responded to the new environment created by complete liberalization of the gas retail market by establishing a Transmission Service Center. The center’s role is to assist new entrants that seek to use our gas pipelines by taking applications for transmission service and billing users after the commencement of service. To ensure neutrality and fair treatment of all retail suppliers, the center’s offices are physically isolated and use of information on retail suppliers for any purpose other than the provision of transmission service is prohibited.
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Work on Aging Gas Pipes and Other Facilities

Replacement of aging cast-iron and other pipes

We are accelerating action to ensure the safety of our gas pipes while effectively upgrading and improving such facilities as aging cast-iron pipes and other old piping.

Each of the pipeline network centers responsible for our gas pipelines formulates and steadily implements annual plans for surveying, inspecting, replacing, and improving facilities according to their priority.

Replacing an aged gas pipe
Replacing an aged gas pipe

 

Replacement of aged white gas pipes

White (galvanized) gas pipes laid at customers' sites can corrode underground. We are in the process of replacing these pipes (with the customers' permission) with polyethylene and other corrosion-resistant pipes.

Where white gas pipes are located in high-risk buildings, we explain to individual customers why they need to be replaced and encourage them to request us to perform the necessary improvement work. In the case of other buildings as well, we take advantage of such opportunities as periodic inspections to encourage customers to order improvement work.


Performance of periodic inspections for gas leaks
Under the Gas Business Act, we conduct periodic inspections to ensure early detection of gas leaks along roads, and immediately make repairs if a leak is detected. Inspections are planned, performed, and managed as required by Gas Business Act-related legislation and directives. We also plan and continuously conduct our own gas leak inspections in addition to the periodic inspections required by law.

DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Patrols of High-Pressure Gas Trunk Lines

High-pressure gas trunk lines are the arteries that deliver city gas from our four LNG terminals to the Tokyo metropolitan area and the rest of the Kanto region. To ensure safe transportation of gas, we are working to maintain these trunk lines using all possible measures and the latest equipment. One important way in which trunk lines are maintained is by means of regular pipeline patrols.

Pipeline patrols are performed to confirm that no construction work has been performed by other companies without first confirming the location of nearby gas pipes with Tokyo Gas, and also that there has been no road damage (such as cracking and subsidence) that might affect our gas pipes. Pipeline patrols also inspect gas supply facilities to confirm that pressure regulators (which adjust gas pressure) and valves (for shutting off the flow of gas) are not producing any unusual noises or vibrations. The various inspections performed during daily pipeline patrols ensure that the highest safety standards are maintained.

Pipeline patrol
Pipeline patrol

DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Delivering Gas Safely

Technologies underpinning the city gas business

For our customers to be able to use gas safely, it is essential that we as a gas supplier possess more basic and specialized knowledge and core technologies than anyone else, be it regarding gas itself or the facilities and appliances that supply and use it. We are committed to strengthening, maintaining, and further developing the essential core technologies that underpin our customers' safety and peace of mind.

We are conducting R&D and expanding our specialist knowledge with a particular focus on combustion technologies and heat transfer and fluid analysis technologies essential to ensuring that gas use is both safe and efficient, technologies for assessing materials and seismic performance essential to ensuring the safety of the gas infrastructure (in particular the pipeline network), and gas analysis techniques for maintaining the high quality of the gas we supply to our customers. Should an incident arise due to a disaster or hardware failure, our specialist engineers in all relevant fields respond immediately, determine the cause, and implement countermeasures to prevent a recurrence.

The core technologies developed as a result of these activities are being applied in other fields as well. Heat transfer and fluid analysis simulation technologies are used to create the most comfortable thermal environment for the human body, while advances we have made in material evaluation techniques have led to improved gas appliance durability. In these and other ways, our research is helping our customers save energy and enjoy more comfortable, convenient lifestyles.


Research on preventing earthquake damage to gas supply infrastructure

We are conducting R&D into making pipelines and other elements of the gas supply infrastructure more earthquake resistant so our customers can feel confident in the safety and stability of their gas supply in the event of a disaster. Experiments conducted using a 3D shaking table capable of recreating the level of shaking experienced during the 1995 Great Hanshin-Awaji Earthquake allow us to assess the safety of the various facilities comprising the gas supply infrastructure. We also use numerical analysis to simulate real-world phenomena on a computer, allowing us to assess the seismic resistance of infrastructure taking into account the complex behavior of underground pipelines.

The results of this research are being used not only to harden our own gas supply infrastructure against earthquakes, but throughout the entire gas industry. We will continue to pursue R&D to help increase the earthquake resistance of the gas industry as a whole.

Testing seismic resistance with a 3D shaking tableTesting seismic resistance with a 3D shaking table
Evaluation of pipeline behavior using numerical analysisEvaluation of pipeline behavior using numerical analysis
 

Providing a range of technological support as a gas industry pioneer

In order to further improve the safety and ease of pipeline work as one element in our development of environmentally friendly technologies, we are engaged in a range of projects to develop, modify, and improve construction methods, including those used to lay and maintain gas pipes. As a pioneer in the gas industry, we seek to contribute to higher standards of pipeline safety and the development of the industry as a whole by actively informing other gas utilities of the advances achieved as a result of these efforts, and assisting them in their introduction.
We disseminate the fruits of our technological development through numerous channels, including technology dissemination seminars held by the Japan Gas Association, exchanges with other gas utilities, and the provision of technological support by Tokyo Gas Group as a whole. We value the benefits for the entire industry of sharing our technologies, which have so far been adopted by 70 gas utilities. We plan to broaden our activities to promote the industry-wide adoption of cutting-edge Tokyo Gas technologies that combine safety, security, and environmental friendliness.

DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.