Hellenic Gas Transmission System Operator S.A.
Εmergency Call
Εmergency Call
8001122222(+30) 2105551666
210 5551666
  • ΕΛ
  • EN
  • THE COMPANY
  • CORPORATE SOCIAL RESPONSIBILITY
  • PRESS CENTER
  • CONTACT
  • ΕΛ
  • EN
search
  • NATIONAL NATURAL GAS SYSTEM
    • National Natural Gas Transmission System
    • LNG Facility
    • Development of the NNGS
      • NNGS Development Study
      • NNGS Development Plan
      • European union list of projects of common interest
    • NNGS Operation Reports
    • Security of Supply
      • Emergency Plan
      • Supply Security Levy
  • REGULATORY FRAMEWORK / COMPLIANCE
    • Union Regulatory Framework
    • Greek Regulatory Framework
      • Ministerial Decisions
      • Decisions of RAE
    • Compliance
      • Compliance Officer Responsibilities
      • Code of Conduct
      • Compliance Program
      • Compliance Guide
      • Annual Reports of the Compliance Officer
      • Submit notification
        • Notification Submission
        • Notification Submission Online Form
  • PROJECTS
    • New projects under constructions
    • New Connections
    • Facilities
    • Incremental Capacity
    • Technical Job Specification List
      • Pipelines
        • Piping – Welding- Vessels
        • Civil
        • Piping
        • Electrical – Cathodic & Lightning Protection
        • Instrumentation
        • Insulation
        • Miscellaneous
      • LNG Installation
  • REGULATORY SERVICES
    • Transmission Services
      • Natural Gas Quality Specification
      • Standard Agreement & Other Documents
      • Transmission Tariffs
        • Charges Calculator
      • Commission Regulation (EU) 2017/460
      • NNGTS Operational Gas
        • NNGTS Operational Gas Consumption
        • Operational Gas Unit Charge
      • Linepack Calculation
      • NNGTS Maintenance/Calibration Program
    • Annex I of Regulation 715/2009
      • Relevant Points and Capacities (Technical/Booked/Available)
      • Additional Transportation Capacity for Delivery
      • Historical Data of Transmission System Operation
        • Historical Data of Natural Gas Quality
        • Historical Data of Natural Gas Deliveries / Off – Takes
        • Capacity usage at Entry / Exit Points – Historical Data
        • Secondary Market of Natural Gas Transmission System
        • Historical Data of Natural Gas Pressure in Entry Points
      • Οther Data
    • Balancing Services
      • Services Description
      • Annual Planning of Gas Balancing
      • Balancing Costs
      • Unaccounted For Gas(UFG)
      • Daily Balancing Gas Price
    • LNG Services
      • Services Description
      • LNG Quality Specifications
      • LNG Terminal Technical Data
      • Standard Agreement & Other Documents
      • LNG Tariffs
        • Calculator of LNG Charges
      • LNG Terminal Operational Needs/ LNG Facility Losses 2010-2020
      • LNG Facilities Maintenance Program
    • Users Information LNG
      • LNG Re – gasification Capacity
      • LNG Cargoes Unloading Program
      • Additional LNG Storage Space
      • Historical Data of LNG Operation
      • Total LNG Stock
    • Capacity Auctions
  • NON REGULATORY SERVICES
    • List of Supplementary Transmission Services
    • Additional LNG Services
    • Οther Non Regulatory Services
      • Polyethylene Welding Certification
      • Gas Metrology Services
      • Operation and Maintenance of Natural Gas Distribution Network
      • Natural Gas Odorization Services
      • Administrative, Technical & Meteorological user support in measuring stations
      • Vehicle Gas Refueling Stations (CNG)
      • Technical Consulting Services
      • Corrosion and Lightning Protection
      • Natural Gas Transmission System Technical Support
      • Non Destructive Testing (NDT) Services
      • Provision of Operational Data
      • Clients
  • SAFETY / ENVIRONMENT / QUALITY
    • Safety
    • Environment
    • Quality
  • ANNOUNCEMENTS
    • NNGS Users Information
    • Public Consultations
    • Procurement Procedures
  • THE COMPANY
    • Our Vision
    • Historical Background
    • Shareholders
    • Subsidiaries
    • Company Organization / Organizational Structure
      • Managing Team
    • Legislative Framework of Tendering Procedures
    • Financial Reports
    • Membership in International Institutions
  • CORPORATE SOCIAL RESPONSIBILITY
  • PRESS CENTER
    • Press Releases
    • Corporate Brochures
    • Multimedia
    • Press Kit
  • CONTACT
REGULATORY SERVICES
  • ΗΟΜΕ
  • REGULATORY SERVICES
  • TRANSMISSION SERVICES
  • NATURAL GAS QUALITY SPECIFICATION
A-AA+
  • Transmission Services
    • Natural Gas Quality Specification
    • Standard Agreement & Other Documents
    • Transmission Tariffs
    • Commission Regulation (EU) 2017/460
    • NNGTS Operational Gas
    • Linepack Calculation
    • NNGTS Maintenance/Calibration Program
  • Annex I of Regulation 715/2009
  • Balancing Services
  • LNG Services
  • Users Information LNG
  • Capacity Auctions

Natural Gas Quality Specification

 
ValueUnitSpecificationNotes
Wobbe IndexKWh/Nm313.066-16.328 
Gross Calorific Value (GCV)KWh/Nm310.174-13.674 
Relative Density-0.56-0.71 
CH4% mole75.0 min 
CO2% mole3.0 max 
N2% mole6.0 max 
02% mole0.2 max 
Hydrogen sulfide(H2S)mg/Nm35.4 maxIn exceptional cases and for a time interval that does not exceed two (2) hours; the content of Natural Gas in Hydrogen sulfide can have a value up to 10.8 mg/Nm3, without however exceeding 6.5 mg/Nm3 as an average Daily value.
Total sulphurmg/Nm380.0 maxIn exceptional cases and for a time period that does not exceed 48 hours it can receive values up to 120 mg/Nm3 without however exceeding 90 Mg/Nm3 as an average Weekly value.
Water Dew Point (WDP)οC+5 maxUnder reference pressure of 80 barg.
Hydrocarbons Dew PointοC+3 maxUnder any pressure from 1 to 80 barg.
Dust and Liquids  Natural Gas should be practically free from gaseous, solid or liquid substances that could pose blockage or malfunction or erosion risks to standard gas facilities and standardized gas equipment. Exception is made to the cases of liquid formation of minuscule droplets in Natural Gas which are impossible to be removed.
Odorizing Substance  The Natural Gas is delivered at the Entry Points without odorizing substance. The Odorizing Substance is added at the Exit Points, when necessary as per the ASME Code.
TemperatureοC0 - 50Under special NNGTS operation conditions or due to technical reasons and in any case for periods that do not exceed 4 hours; the temperature may be less than 0°C. In this case, Natural Gas temperature must necessarily be greater than -10°C and at least 5°C higher than the WDP temperature of Natural Gas under operating pressure.

*Normal Cubic Meter or Nm3 shall mean the quantity of Natural Gas, which at conditions of absolute pressure 1.01325 bar and temperature zero (0) degree Celsius, occupies volume of one (1) cubic meter.

Hellenic Gas Transmission System Operator S.A.
Site Map
  • NATIONAL NATURAL GAS SYSTEM
    • REGULATORY FRAMEWORK / COMPLIANCE
      • PROJECTS
        • REGULATORY SERVICES
          • NON REGULATORY SERVICES
            • SAFETY / ENVIRONMENT / QUALITY
              • ANNOUNCEMENTS
                AfterSiteMap
                Contact
                • DESFA Head Office
                • 357 -359 Mesogeion Av.
                • 152 31 Chalandri
                • Tel: +30 213 0884000
                • Fax: +30 210 6749504
                • Email: desfa@desfa.gr
                Εmergency Call
                Εmergency Call
                8001122222 (+30) 2105551666
                Links
                • Ministry Of Environment & Energy
                • RAE (Regulating Authority for Energy) in Greece
                • EDA Attica
                • EDATHESS Gas Distribution Company Thessaloniki - Thessalia SA
                • DEDA
                • ADMIE
                • LAGIE
                • ENTSOG
                • Gas Naturally
                • GIE
                • IGU
                Social Media

                © copyright DESFA 2018

                Top