Doğalgaz Sektöründe Varlık Yönetimi ve Gaz Kalitesi

Consistent Asset Management and Harmonised European Gas Quality

INGAS 2009 Istanbul 9-10 June 2009

Terry Williams, Principal Consultant, GL Industrial Services UK (formerly Advantica)

No. 2

Content

ASSET MANAGEMENT

• Formal, auditable, consistent approach to operations & maintenance• Example of a risk management exercise

EUROPEAN GAS QUALITY

• Harmonised European Standard• Increased pipeline interconnection and LNG imports • Requirement for an appliance testing programme

No. 3

Integrity Management

Operate/Maintain the Asset in a Safe, Efficient and Cost Effective Manner

Provides a continuous route to improvement of process & performance

P Policy

O Organising

P Planning

I Implementing

M Measurement

A Audit

R Review

No. 4

Document Structure

No. 5

Control Framework

No. 6

Risk Management & Mains Replacement• MRP based on Risk & Condition Models

Quantifies expected failure rate on pipe-by-pipe basis• Combines the likelihood of leakage with its consequences• Uses results to run scenarios to evaluate replacement strategies

• Basic Data for pipework:• Diameter and length• Age & Failure history• Location & Operating pressure

• Survey Data for local environment:• Proximity to property• Type of surface (sealed or open ground)• Nearby properties with cellars

No. 7

Risk Management & Mains Replacement

• Background Breakage Zone (BBZ), based on fractures, • Background Corrosion Zones (BCZ) based on corrosion leaks• Background Joint Zones (BJZ), based on joint leaks

Background Failure Zones

A factor unique to MRP

Identifies areas of higher than average failure activity

No. 8

Risk Management & Mains Replacement

No. 9

Risk Management & Mains Replacement

• Scenarios can be run to determine pipeline lengths for replacement

• Prioritisation is based on a company’s unique strategy • Prioritising by risk score alone will reduce explosion incidents effectively.• Prioritising by condition score alone will reduce leakage repairs effectively.

• The process is flexible enough to allow prioritisation to be performed on risk or condition or a combination of the two.

• In addition, the utility can input limits on each years’ replacement programme, either by cost or length.

No. 10

Risk Management & Mains Replacement• In the UK, GL (Advantica) have provided Mains Replacement models

to National Grid since the 1980’s.

• Current methodology was endorsed by the UK Government safety agency, Health and Safety Executive, in 1999, and adopted by National Grid in 2000.

• GL is currently assisting National Grid in identifying mains for replacement as part of their national 30 year programme to replace all cast iron and ductile iron mains within 30 metres of property in the next 30 years, directing a replacement programme costing approximately £15 billion (17.5 billion euros).

No. 11

Harmonised European Gas Quality- Phase 1 - Appliance Testing Programme • European Commission Mandate 400 to CEN for “Standardisation in

the Field of Gas Qualities”

• CEN Mandate: “…For the combustion parameters a testing programme on safety, efficiency and environmental impact is needed in order to define the standards…”

• Only GAD-compliant appliances are included (Directive 90/396/EEC)

• Only domestic appliances to be tested

• All European countries using gas in H Group (defined in EN 437)

No. 12

Harmonised European Gas Quality- Phase 1 - Appliance Testing Programme

Danish Gas Technology Centre DGC DK NB / LAB / CE

GL (Advantica) GL (ADV) UK NB / LAB / CE

ARGB ARG BE NB / LAB / CE

DVGW CERT DVGW GE NB / CE

BRG BRG UK ME

Gaz de France GDF FR CE

Gasunie GAS NL CE

AFG AFG FR NB/CE

Inig INIG POL NB / LAB / CE

British Gas BG UK CE / IE

CETIAT CET FR LAB / CE

REPSOL REP SP NB / LAB / CE

DVGW-EBI EBI GE LAB / CE

BAXI BAXI UK MAN

RIELLO RIE IT MAN

VAILLANT VAI GE MAN

No. 13

Harmonised European Gas Quality- Phase 1 - Appliance Testing Programme

No. 14

Harmonised European Gas Quality- Phase 1 - Appliance Testing Programme• The total number of gas customers (domestic, commercial and

industrial) in the EU25 was 102 million in 2005 (source: Eurogas)• There are some 150 Million or more gas appliances installed in the

EU25. • The GASQUAL project will bring an answer to the impact of various

scenarios of gas quality changes on safety, efficiency and emissions of those appliances covered by the GAD directive.

• For non-GAD appliances the study will enable the assessment of the potential risk on the basis of a theoretical approach and we will make some recommendations on how to investigate those appliances further.

No. 15

Thank you for your attention!