Which Pressure Systems Require Statutory Inspection?

ressure systems are used in many workplaces, but not all pressure equipment is subject to statutory inspection. Dutyholders often struggle to understand which systems fall under legal inspection requirements and which do not.

Knowing which pressure systems require statutory inspection is essential for complying with the Pressure Systems Safety Regulations 2000 (PSSR) and managing risk effectively.

What is classed as a pressure system?

Under PSSR, a pressure system is an assembly of components that contains a relevant fluid under pressure. Relevant fluids include:

• Steam

• Gases under pressure

• Compressed air

A pressure system may include vessels, pipework, protective devices and associated components where failure could give rise to danger.

Which pressure systems are covered by PSSR?

Statutory inspection under PSSR applies to pressure systems that meet specific criteria set out in the regulations.

In practice, this commonly includes:

• Steam boilers and steam systems

• Compressed air systems and air receivers

• Pressure vessels containing gases or vapours

• Pipework associated with these systems where failure could be dangerous

Whether a system requires statutory inspection depends on factors such as pressure, volume, temperature and the type of fluid contained.

Do all pressure systems require statutory inspection?

No. Not all pressure equipment falls within the scope of PSSR.

Some systems may be excluded based on factors such as:

• Very low pressure or volume

• Systems designed to operate below defined thresholds

• Equipment covered by other specific regulations

However, exclusions are specific and should not be assumed. Where there is uncertainty, systems should be assessed by a competent person to determine whether PSSR applies.

What is statutory inspection under PSSR?

Statutory inspection under PSSR takes the form of a thorough examination carried out in accordance with a written scheme of examination.

The written scheme defines:

• Which parts of the pressure system require examination

• The nature of the examination

• The examination frequency

The inspection is carried out to confirm that the pressure system can continue to be operated safely.

How often are pressure systems inspected?

Unlike LOLER, PSSR does not set fixed inspection intervals.

Inspection frequency is determined by the written scheme of examination, which is produced by a competent person based on:

• The type of system

• Operating conditions

• Potential failure modes

• Risk of danger

Examinations must be carried out in line with the written scheme.

Are maintenance and statutory inspection the same?

No. Maintenance and statutory inspection are separate activities.

• Maintenance is carried out to keep the system operating correctly

• Statutory inspection under PSSR assesses whether the system is safe to continue in use

Routine servicing does not replace the requirement for statutory inspection where PSSR applies.

Who is responsible for ensuring inspection takes place?

Responsibility for statutory inspection rests with the dutyholder. This may be:

• An employer

• A building owner

• A facilities management company

• An operator of pressure systems

Dutyholders must ensure that a written scheme of examination is in place and that inspections are carried out as required.

Summary

In summary:

• PSSR applies to pressure systems containing relevant fluids

• Not all pressure equipment requires statutory inspection

• Steam and compressed air systems commonly fall within scope

• Statutory inspection is carried out under a written scheme of examination

• Inspection frequency is determined by a competent person

• Dutyholders are responsible for compliance

Understanding which pressure systems require statutory inspection is critical for managing safety and meeting legal obligations.