Navigating the Pressure Equipment Regulations (PER) 2016: A UK Manufacturer’s Guide

As a UK-based manufacturer of pressure equipment, compliance with the Pressure Equipment Regulations (PER) 2016 is not just a legal requirement; it’s essential for safe, reliable operations and market access across Great Britain. In this guide, we’ll unpack the key obligations under PER 2016 and highlight how LTi Vessco can support you at every stage, from design and assessment through to ongoing inspection and maintenance.

1. Understanding the Scope of PER 2016
PER 2016 implements the former EU Pressure Equipment Directive into UK law. It applies to vessels, piping, safety accessories and pressure accessories where the product of maximum allowable pressure and volume exceeds 50 bar litres. Equipment below that threshold still demands safe design and fabrication but undergoes fewer conformity assessment steps.

2. Classification and Conformity Assessment
Under PER 2016, pressure equipment is classified from Category I (lowest hazard) through Category IV (highest hazard). Classification depends on the intended fluid group (such as gas, steam or liquid) and the calculated pressure volume rating. Higher hazard equipment must complete more rigorous conformity modules, which include internal production control plus supervised product checks (Module A2), formal design examination by a UK Approved Body (Module B), and quality assurance of production processes (Module D).

3. Technical Documentation Requirements
A comprehensive technical file is at the heart of PER compliance. It needs to contain detailed design drawings, material specifications, calculation notes, welding procedures, and records of quality control and inspection. Test reports, such as hydrostatic tests that prove strength and leak tightness, and non destructive examinations like ultrasonic or radiographic inspections, must also be included. Any design alteration or material substitution prompts an immediate review of this dossier. LTi Vessco prepares and maintains these technical files on your behalf, ensuring your paperwork meets PER demands and remains audit ready.

4. Pressure Testing and Inspection
Before your equipment can be placed on the market or put into service, it must pass all prescribed tests. Hydrostatic testing establishes structural integrity, while non destructive examinations detect hidden flaws. Once in service, inspection intervals vary according to equipment category and operating conditions, typically ranging from every two to ten years. LTi Vessco’s testing teams are equipped to perform all required examinations at our specialist facilities.

5. CE (UKCA) Marking and Declaration of Conformity
Successful completion of conformity assessment allows your equipment to bear the CE mark for EU markets and the UKCA mark for Great Britain. You must compile a declaration of conformity that outlines the harmonised standards applied and the modules completed.

6. Post Market Obligations and Maintenance
PER 2016 obliges manufacturers to monitor equipment in service and record any non conformities or safety incidents. If an issue arises (such as an unexpected leak or material fatigue) you must document corrective actions, including repairs or design modifications. In many cases, this triggers an update to the technical file and may require re assessment.

7. Partnering with LTi Vessco
LTi Vessco offers true end to end expertise, covering every regulatory step from initial design review through to decommissioning. We expedite assessments by liaising directly with recognised UK Approved Bodies and cut through administrative delays. Whether you need hydrostatic testing, advanced non destructive examinations or a tailored maintenance plan that includes scheduled visits and inspection reminders, our comprehensive services ensure your equipment remains compliant throughout its life span.


If you require the design and manufacture of pressure vessels, contact our team today for a no obligation consultation. Discover how LTi Vessco can support your next project and keep your pressure equipment certified and safe.