BS EN 17975-2025 PDF

Full title and description

STB BS EN 17975-2025 — Maintenance. Risk control processes of energies and fluids risks in maintenance activities. Guidance. This standard provides guidance for identifying, assessing and controlling risks from sources of energy and hazardous fluids during maintenance, with practical recommendations for isolation, lock‑out/tag‑out (LOTO/LOTOTO), verification and organisational measures to protect personnel and equipment.

Abstract

BS EN 17975:2025 is a guidance standard addressing processes to control energy- and fluid-related risks that arise during maintenance activities on machines, plant and installations. It describes methods to identify energy and fluid sources, to implement safe isolation and lockout/tagout procedures (including verification/try-out), to define roles and responsibilities, and to integrate these controls into management systems, training and documentation. The aim is to reduce incidents caused by unintended re‑energisation, release of pressure, release of hazardous substances or other energy releases during maintenance.

General information

• Status: Current / Published national adoption of EN 17975:2025.
• Publication date: 18 June 2025 (EN edition adopted in 2025).
• Publisher: British Standards Institution (BSI) — national adoption of the European Standard (EN) developed under CEN.
• ICS / categories: 03.080.10 (Industrial services); 13.100 (Occupational safety; industrial hygiene).
• Edition / version: 1st edition — 2025.
• Number of pages: 102 (approx.).

Scope

This standard gives guidance on processes to control risks from energies (e.g., electrical, mechanical, hydraulic, pneumatic, thermal) and fluids (e.g., gases, vapours, liquids, oils, chemicals) during maintenance activities. It covers identification and classification of hazardous energy and fluid sources, safe isolation and de‑energisation procedures, lockout/tagout and try‑out verification steps, organisation and competence requirements, and the integration of these measures into workplace procedures and safety management systems. It is applicable to maintenance work on machines, plant and installations across a wide range of industry sectors; it is guidance rather than mandatory technical requirements.

Key topics and requirements

• Identification and classification of energy and fluid sources associated with maintenance tasks.
• Risk assessment for maintenance activities, before, during and after interventions.
• Safe isolation procedures including de‑energisation, bleed/drain, venting and blanking.
• Lockout/Tagout (LOTO) and expanded LOTOTO procedures, including the use of physical locks, tags and administrative controls.
• Verification (try‑out) of effective isolation prior to commencing work.
• Roles and responsibilities: authorising persons, isolators, maintenance personnel and verifiers.
• Procedural documentation, permit‑to‑work interfaces and record keeping.
• Training, competence and communication requirements for personnel involved in maintenance and isolation.
• Management of residual risks and coordination for multi‑employer sites or complex, interconnected systems.
• Recommendations for equipment design, marking of isolation points and compatibility with control systems and safety interlocks.

Typical use and users

This guidance is used by employers, safety managers, maintenance managers, plant engineers, health & safety advisers, contractors and trainers to design, update or harmonise maintenance safety procedures. It is particularly relevant to manufacturing, process industries (chemical, oil & gas, petrochemical), energy and utilities, heavy engineering, large building services (HVAC, pumping stations), and any organisations performing in‑house or outsourced maintenance on equipment that contains hazardous energy or fluids.

Related standards

Commonly referenced standards and frameworks when implementing the guidance in EN 17975:2025 include EN ISO 12100 (safety of machinery — risk assessment), EN ISO 14118 (prevention of unexpected start‑up of machinery), EN 60204‑1 (electrical equipment of machines), ISO 45001 (occupational health & safety management), and national lockout/tagout guidance and regulatory requirements. National adoptions (for example UNI EN 17975:2025, BS EN 17975:2025) provide the standard text in local languages and may include national forewords or implementation dates.

Keywords

maintenance safety, lockout tagout, LOTOTO, energy isolation, fluids risk, de‑energisation, verification, permit‑to‑work, risk assessment, LOTO procedure, maintenance management

FAQ

Q: What is this standard?

A: BS EN 17975:2025 is a European guidance standard adopted nationally (BS EN) that sets out recommended processes to control energy- and fluid-related risks during maintenance activities. It provides practical guidance rather than mandatory prescriptions.

Q: What does it cover?

A: It covers identification of energy and fluid hazards, risk assessment for maintenance tasks, safe isolation and lockout/tagout (LOTO/LOTOTO) procedures including try‑out/verification, organisational arrangements, training and documentation required to manage those risks.

Q: Who typically uses it?

A: Employers, maintenance and safety managers, plant engineers, contractors, health & safety professionals and trainers use the standard to develop or improve safe maintenance procedures and training programmes across industry sectors.

Q: Is it current or superseded?

A: The 2025 edition is the current guidance edition (first EN edition published in 2025). Users should check their national standards body for the exact national adoption reference and any national implementation/withdrawal dates of previous national standards.

Q: Is it part of a series?

A: EN 17975:2025 is a standalone guidance document addressing maintenance energy and fluid risk processes; it is commonly used together with other machinery and safety standards (for example EN ISO 12100, EN ISO 14118 and sector‑specific standards) to form a coherent maintenance safety framework.

Q: What are the key keywords?

A: Maintenance safety, lockout/tagout (LOTO), LOTOTO, energy isolation, fluids risk, verification (try‑out), permit‑to‑work, risk assessment, maintenance procedures.