Steam systems play a critical role in many industries, from manufacturing to food processing. They also present significant risks if not properly managed. The Pressure Systems Safety Regulations 2000, known as PSSR, set out clear requirements to ensure these systems operate safely.

If your business uses steam systems, you must understand how PSSR applies and what actions you need to take.

What Is a Steam System Under PSSR?

A steam system includes any plant that contains or uses steam under pressure. This typically includes:

• Steam boilers
• Pipework carrying steam
• Pressure vessels
• Safety valves and control systems
• Associated fittings and controls

If the system operates above 0.5 bar pressure, it is likely to fall under PSSR.

What Is a Written Scheme of Examination (WSE)?

A Written Scheme of Examination is a key requirement under PSSR. It is a document prepared by a competent person that outlines how your steam system will be examined to ensure safety.

The WSE defines:

• Which parts of the system must be examined
• The type of examination required
• The frequency of examinations
• Any specific conditions for safe operation

You must have a valid WSE in place before operating a steam system.

Your Responsibilities Under PSSR

As the duty holder, you must ensure your steam system is safe throughout its lifecycle.

Your responsibilities include:

• Having a current Written Scheme of Examination
• Ensuring examinations are carried out at the required intervals
• Acting on any defects identified during inspections
• Keeping accurate records of examinations and repairs
• Operating the system within safe limits

Failure to meet these requirements can lead to enforcement action and serious safety risks.

Why Regular Examinations Are Essential

Steam systems operate under high pressure and temperature. If a failure occurs, the consequences can be severe.

Regular examinations help to:

• Identify corrosion, cracking, or wear
• Confirm safety devices are functioning correctly
• Detect issues before they become critical
• Maintain safe operating conditions

Examinations must be carried out by a competent person in line with your WSE.

Common Risks in Steam Systems

Understanding common risks helps you manage them effectively. These include:

• Overpressure due to failed safety valves
• Corrosion within boilers and pipework
• Blocked or damaged pressure relief systems
• Poor maintenance or incorrect operation

Addressing these risks requires a combination of inspection, maintenance, and operator awareness.

What Happens If You Do Not Comply?

Non-compliance with PSSR can result in:

• Enforcement notices from regulators
• Fines and legal action
• Equipment failure and unplanned downtime
• Serious injury or damage

In some cases, defects identified during examination may be reported directly to the enforcing authority if they pose a significant risk.

How to Maintain Ongoing Compliance

To maintain compliance with PSSR for steam systems:

• Keep your Written Scheme of Examination up to date
• Schedule examinations in advance
• Train staff to operate systems safely
• Monitor system performance and condition
• Work with a competent inspection provider

Why PSSR Compliance Matters

Steam systems are essential to many operations, but they must be managed carefully. When you follow PSSR requirements, you protect your workforce, maintain reliability, and reduce the risk of costly failures.