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HSE and major accident hazard (MAH) pipelines

We regulate health, safety and integrity issues for all natural gas and other applicable pipelines in Great Britain, in territorial waters and the UK continental shelf. This site concentrates on MAH pipelines.

Who we are

Responsibility for enforcing health and safety law for onshore and offshore MAH pipelines forms part of the role of the Specialised Industries Gas and Pipelines Unit in HSE's Hazardous Industries Directorate (HID).

The unit and its pipeline inspectors achieve regulation and compliance through the enforcement of the Health and Safety at Work Act 1974, the specific legislation listed below and other relevant health and safety regulations

Sector Performance


HSE Approved Codes of Practice and Guidance

Further guidance



Updated 2021-02-25