Conversion of Gas Pipelines to Hydrogen Networks

Detailed Explanation With Case Laws

1. Introduction

Conversion of existing gas pipelines into hydrogen networks means reusing natural-gas pipelines, storage systems, compressors and related infrastructure to transport hydrogen. This can reduce the cost and time needed to develop a new hydrogen network. However, hydrogen has different physical and safety characteristics from natural gas. Therefore, old pipelines cannot simply be used without technical testing, legal approval and safety controls.

The legal challenge is to balance energy transition, public safety, environmental protection, infrastructure investment and consumer interests.

2. Meaning of Pipeline Conversion

Pipeline conversion may take different forms:

Hydrogen blending – hydrogen is mixed with natural gas and transported through the existing pipeline.

Partial conversion – particular sections of the gas network are converted for hydrogen.

Full conversion – a pipeline is permanently changed from natural gas to hydrogen.

Dedicated hydrogen networks – existing infrastructure is modified so that it carries only hydrogen.

Conversion requires examination of pipeline materials, valves, compressors, meters, pressure levels and storage facilities.

3. Why Legal Regulation Is Necessary

Hydrogen can create technical risks because its properties differ from natural gas. It can affect some pipeline materials and equipment and may require changes to pressure management, leakage detection and safety systems.

Therefore, regulators must establish:

technical standards;

safety requirements;

licensing rules;

inspection procedures;

environmental approvals;

emergency-response requirements;

rules for third-party access;

liability for accidents and leakage; and

consumer-protection requirements.

A pipeline operator should not be allowed to convert infrastructure without demonstrating that the system is technically suitable and safe.

4. South African Legal Framework

In South Africa, the Gas Act 48 of 2001 is important for gas infrastructure and activities involving gas transmission and distribution. The National Energy Regulator Act 7 of 2004 establishes the regulatory framework for energy regulation.

Environmental consequences of major infrastructure changes may also fall under the National Environmental Management Act 107 of 1998 (NEMA). Section 24 of the Constitution is particularly important because environmental decisions must consider protection of the environment and sustainable development.

Where public entities are involved, constitutional principles of lawfulness, accountability, transparency and rational decision-making also become relevant.

5. Regulatory Approval and Technical Assessment

Before conversion, the operator should conduct a detailed assessment covering:

pipeline material and age;

hydrogen compatibility;

pressure limits;

leakage risks;

compressor compatibility;

valve and meter compatibility;

corrosion and embrittlement risks;

emergency shutdown systems;

proximity to residential areas; and

environmental impacts.

The regulator should require evidence that the proposed conversion will not create unreasonable risks to workers, consumers or surrounding communities.

6. Third-Party Access and Competition

An important legal issue is whether converted hydrogen infrastructure should remain open to competing producers and suppliers.

If one company controls an important hydrogen pipeline, it could potentially restrict access for competitors. Competition law may therefore become relevant, particularly where the infrastructure operates as an essential or strategically important facility.

Rules concerning non-discriminatory access, tariffs, connection and capacity allocation can encourage competition while protecting network reliability.

7. Relevant Case Laws

Fuel Retailers Association of Southern Africa v Director-General: Environmental Management (2007)

The Constitutional Court emphasised that environmental decision-making must consider sustainable development and the interaction between economic and environmental interests. This principle is relevant when deciding whether an existing gas pipeline should be converted for hydrogen.

Earthlife Africa Johannesburg v Minister of Environmental Affairs (2017)

The case concerned environmental decision-making relating to major energy infrastructure. It demonstrates the importance of considering relevant environmental and climate consequences before approving significant energy projects. It is relevant by analogy to hydrogen pipeline conversion.

Pharmaceutical Manufacturers Association of SA: In re Ex Parte President (2000)

The Constitutional Court held that exercises of public power must have a lawful basis and satisfy rationality. A regulator approving hydrogen conversion must therefore act within its legal authority and use rational decision-making.

Bato Star Fishing (Pty) Ltd v Minister of Environmental Affairs (2004)

The case explains principles governing judicial review of administrative decisions. It is relevant where a regulator's decision concerning pipeline conversion is challenged.

Minister of Health v New Clicks South Africa (2006)

The case highlights the importance of following proper statutory procedures when making regulatory decisions. Similar procedural discipline would be important for hydrogen-network approvals.

8. Liability and Contracts

Conversion also creates contractual questions. Existing gas transportation agreements may not automatically cover hydrogen transportation. Contracts may therefore need provisions dealing with:

hydrogen quality;

pressure requirements;

capacity;

contamination;

safety responsibilities;

maintenance;

insurance;

accidents;

interruption of service;

force majeure; and

termination rights.

Clear allocation of these risks is necessary because pipeline operators, hydrogen producers and network users may otherwise dispute responsibility after an accident or system failure.

9. Main Challenges

The major challenges include technical uncertainty, high conversion costs, ageing infrastructure, safety risks, regulatory gaps and unclear ownership or access rights. Another challenge is determining who should pay for modifications and who should bear liability if the converted network fails.

10. Conclusion

Conversion of gas pipelines into hydrogen networks can support the transition toward a lower-carbon energy system by making use of existing infrastructure. However, conversion must not be treated simply as an engineering project. It is also a legal and regulatory process involving safety, licensing, environmental protection, competition, access and contractual responsibility.

South African regulators should therefore use risk-based regulation, technical testing, environmental assessment and transparent decision-making before approving conversion. The principles developed in Fuel Retailers, Earthlife Africa, Pharmaceutical Manufacturers, Bato Star and New Clicks provide useful legal guidance for ensuring that hydrogen infrastructure development remains lawful, rational, safe and environmentally responsible.