Jan 2017
Gas Distribution
A new technical specification for future gas composition analysis equipment
Jan 2017
Jul 2017
National Grid Gas Distribution and Northern Gas Networks
NGGDx – Andy Lewis NGN – Adam Madgett
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Network Innovation Allowance
Gas Distribution Networks
It is anticipated that the project will consist of the following project stages:

Task 1: HSL to collate headline research on future measurement requirements including:

• Screening exercise for possible future gas components including hydrogen;

• Possible ranges of concentrations;

• Consideration of contaminants;

• Standards and certification requirements;

• Parameters for technical specification.

Task 2: Full Day Technical Workshop (1) (hosted at HSL)

Attended by technical representation from NGGD, NGN (plus possible other GDN’s) plus industry specialists.

Workshop Objectives

• Build a common understanding of the requirements associated with network gas composition measurement;

• Have an informed debate on future challenges;

• Engage with industry and experts to get an oversight of possible future measurement techniques and equipment under development.

Workshop agenda

• Current instruments and standards:

• The current asset base;

• Current standards and certification requirements;

• Current software interface requirements

• Future challenges for gas measurement:

• Future measurement challenges;

• Bio-gas experience for gas analyser implementation.

• Possible Future Measurement Techniques and Equipment:

• Future measurement techniques;

• Commercially available gas analysers.

Task 3: Data collection stage to feed into draft technical specification:

Following the workshop HSL will contact project partners directly for their input to the technical specification. This may take the form of a series of face to face meetings or telephone calls.

Task 4: HSL to produce a draft of the Outline Technical Specification for discussion.

Task 5: Full day Technical Workshop (2) to review draft Specification (hosted at HSL):

• HSL presentation of outline technical specification;

• Peer review and comments.

Task 6: HSL to collate input and write final Outline Technical Specification.

This objective of this project is identify and characterise these future challenges in more detail and produce an Outline Technical Specification for gas composition analysis equipment operating with a proportion of hydrogen that may be needed on the future gas network.


The specification will address such issues as:

Possible future gas components including hydrogen and consideration of contaminants;

Supply pressure and flow rate parameters;

Speed of response requirements; 

Required accuracy;

Likely future number and location of instruments;

Required data and software interfaces;

Expected environmental operating conditions;

Requirements for safety performance (both Atex rating and safety critical control);

Expected power requirements;

Cost expectations;

Operational requirements and constraints, failure modes and spares.

The intention is that this technical specification can then be shared with industry to identify suitable equipment that is available for use on the network in the future and can be tested on demonstration projects such as HyDeploy. If such instrumentation does not exist then the technical specification is intended to stimulate development of such instruments through academic bodies such as NPL or commercial organisations.

Completion of the task outlined above should produce an Outline Technical Specification of an instrument that will meet the future challenges of a gas supply system sourced from multiple supplies. The specification may be met by currently available instruments or it may be a blueprint for a new instrument from the analyser manufacturers. A major indication of success for this project will be an endorsement of the specification from all the potential users. In summary the key indicators of success are:

1) An Outline Technical Specification

2) An endorsement from all the GDNs.