What Is a Written Scheme of Examination Under PSSR?

Pressure systems are used across many workplaces, including commercial buildings, manufacturing sites and healthcare environments. Where pressure systems are in use, specific legal duties apply to ensure they are examined and managed safely.

A key requirement under UK law is the written scheme of examination PSSR, which defines how pressure systems must be examined to remain compliant and safe.

What does PSSR mean?

PSSR refers to the Pressure Systems Safety Regulations 2000.

These regulations apply to pressure systems containing a relevant fluid, such as steam, compressed air or gases, where stored energy could pose a danger if released.

PSSR places legal duties on those responsible for pressure systems to ensure they are properly examined and maintained.

What is a written scheme of examination under PSSR?

A written scheme of examination under PSSR is a formal document produced by a competent person. It specifies how a pressure system is to be examined to ensure it can continue to be operated safely.

The written scheme must identify:

• The parts of the pressure system that require examination

• The nature of the examination

• The frequency at which examinations must be carried out

The scheme must be in place before the pressure system is operated.

Which pressure systems require a written scheme of examination?

A written scheme of examination is required for pressure systems that fall within the scope of PSSR. This commonly includes:

• Steam boilers and associated pipework

• Compressed air systems and air receivers

• Pressure vessels containing relevant fluids

• Ancillary equipment where failure could give rise to danger

Whether a system requires a written scheme depends on factors such as pressure, volume and the type of fluid contained.

Who prepares the written scheme of examination?

The written scheme of examination must be drawn up by a competent person.

This is someone with the appropriate knowledge, experience and independence to assess the pressure system and identify which parts require examination to prevent danger.

The competent person is not responsible for maintenance or repair, but for defining and carrying out the statutory examination regime.

How often must examinations take place?

The written scheme of examination will specify the examination intervals for the pressure system.

There is no fixed statutory interval under PSSR. Instead, examination frequency is determined by the competent person based on:

• The type of system

• Operating conditions

• Potential failure modes

• Risk of danger

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

What happens after a PSSR examination?

Following examination, the competent person must produce a written report.

If defects are identified that could give rise to danger, the dutyholder must take appropriate action. In some cases, the enforcing authority may need to be notified, depending on the nature of the defect.

Reports must be retained as part of statutory compliance records.

Who is responsible for ensuring compliance?

Responsibility for ensuring a written scheme of examination is in place rests with the dutyholder. This may include:

• Employers

• Building owners

• Facilities management companies

• Operators of pressure systems

Dutyholders must ensure that examinations are carried out in line with the written scheme and that any recommendations are addressed.

Summary

In summary:

• PSSR applies to pressure systems containing relevant fluids

• A written scheme of examination is a legal requirement

• The scheme defines what is examined and how often

• It must be produced by a competent person

• Examinations must follow the written scheme

• Dutyholders are responsible for compliance

Understanding and implementing a written scheme of examination under PSSR is essential for the safe and compliant operation of pressure systems.