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Pressure EquipmentPED

# UK Pressure Equipment Regulations Guide

The Pressure Equipment (Safety) Regulations 2016 (as amended) and Simple Pressure Vessels (Safety) Regulations 2016 apply to pressure equipment placed on the Great Britain market. These regulations ensure safety of pressure equipment through categorization, conformity assessment, and UKCA marking.

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## Pressure equipment categories

Category

Risk level

Assessment

I

Low risk

Module A (internal production control)

II

Medium risk

Module D1 or E1 (quality system or product checks)

III

Higher risk

Module D or E or F (quality system or product verification)

IV

Highest risk

Module G (unit verification) or B+D/E/H1

## Essential safety requirements

Pressure equipment must meet essential safety requirements including:

*   Design and construction for safe operation under foreseeable conditions
*   Protection against exceeding maximum allowable limits
*   Proper materials selection for pressure containment
*   Adequate safety devices and protective systems
*   Safe access for operation and maintenance
*   Clear operating instructions and safety information
*   Traceability through marking and documentation

## Conformity assessment modules

The Pressure Equipment Regulations use conformity assessment modules similar to other UK product regulations:

*   **Module A:** Internal production control for Category I
*   **Module B:** EU type-examination (design assessment)
*   **Module C2:** Conformity to type with surveillance
*   **Module D/D1:** Quality assurance of production process
*   **Module E/E1:** Product quality assurance
*   **Module F:** Product verification
*   **Module G:** Unit verification
*   **Module H/H1:** Full quality assurance

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## Frequently asked questions

### What pressure equipment needs UKCA marking?

Pressure equipment and assemblies with maximum allowable pressure above 0.5 bar require UKCA marking when placed on the Great Britain market. Simple pressure vessels have separate requirements.

### How is pressure equipment categorized?

Pressure equipment is categorized based on fluid group (dangerous or other), pressure, volume/diameter, and equipment type. Categories I-IV determine the conformity assessment route required.

### Do I need an Approved Body for pressure equipment?

Category I equipment can be self-certified. Categories II-IV require involvement of a UK Approved Body for conformity assessment, depending on the specific module selected.

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Related guides

*   [UKCA Marking OverviewComplete guide to UKCA marking for the Great Britain market: requirements, timeline, costs, GB vs NI differences, and how to tr…](/guides/ukca-marking)
*   [UK Gas AppliancesComplete guide to UK gas appliances regulations: UKCA marking, safety requirements, conformity assessment, and technical docume…](/guides/uk-gas-appliances)
*   [UK Testing and Approved BodiesComplete guide to UK testing requirements, UK Approved Bodies (formerly Notified Bodies), UKAS accreditation, and selecting lab…](/guides/uk-testing-approved-bodies)

Educational resource only. Pressure equipment safety is critical. Always consult relevant standards and Approved Bodies.