Working on a gas network involves more than routine maintenance and standard tasks. Some operations fall outside regular procedures, they carry higher risk and demand extra care. These are classed as Non‑Routine Operations (NROs). Under the knowledge‑based scheme Safe Control of Operations (SCO), NROs require specific training, planning, and authorisation. This blog explains what defines an NRO, why it matters, and who needs to hold valid NRO training credentials.
What Are Non‑Routine Operations (NROs)?
An NRO refers to any task on the gas network that does not follow standard, repeatable procedures or falls outside the realm of routine operations. These tasks often involve non‑standard conditions, elevated hazard levels, or complex system changes. The NRO module under the SCO scheme exists to ensure these higher‑risk works are properly controlled, documented, and supervised.
The national standard guiding this approach is IGEM/GL/6 Edition 3. It sets out requirements for safe control of gas operations. Under this standard, gas network companies and contractors must follow a risk‑based method to decide when works qualify as an NRO, and must apply formal procedures (permitry) accordingly.
Because NROs carry increased risk, they demand rigorous documentation, assessment, and authorised supervision before work commences.
Why Are NROs Treated Differently?
Routine jobs such as meter inspections or simple maintenance generally follow standard operating procedures. NROs, on the other hand, cover scenarios involving higher risk, where mistakes can result in serious safety hazards, gas escapes, pressure issues, or network instability.
Typical risk factors triggering NRO classification include:
- Working on live pipelines or systems under pressure
- Making major alterations to the network (e.g. new mains, reconfigurations, tie‑ins)
- Complex isolations, switching operations, or pressure regulation changes
- Emergency repairs following a system failure or unexpected incident
- Tasks for which no standard method statement applies, requiring bespoke procedures and risk assessment
Because of these potential dangers, gas network operators must treat NROs with stricter controls. The procedures must include submission of a correctly completed NRO form, risk assessment, assignment of competent personnel, and formal authorisation before work begins.
Common Examples of Non‑Routine Operations
To make this clearer, here are real-world situations that typically qualify as NROs:
- Commissioning a new gas main section or connecting it to a live distribution system
- Decommissioning, isolating, or re-pressurising a network segment after maintenance or repair
- Replacing or servicing pressure‑regulating equipment where existing network conditions change significantly
- Emergency intervention after a leak, burst pipe, or failure requiring deviation from standard procedures
- Complex network modifications that alter flow paths, pressure zones, or require non-standard access and control measures
If your job involves these kinds of operations, or similar high‑risk tasks, you need NRO‑level competence and authorisation.
Who Must Hold NRO Training?
Because of the higher risk and complexity of NROs, not everyone on a gas site is cleared to perform them. Under the SCO scheme, certain roles require valid registration:
- Named Competent Persons (CPs): Individuals who carry out or supervise NRO‑level tasks on the gas network.
- Authorising Engineers (AEs): Senior or qualified engineers responsible for reviewing, approving, and authorising NRO documentation before work begins.
Employers, project managers, and network controllers determine who receives these roles based on experience, responsibility, and scope of work. If you are asked to plan, sign-off, supervise or complete non‑routine jobs, you must hold valid NRO registration.
At Jason Rowley Training, we ensure delegates who complete the NRO training meet these role requirements.
How SCO NRO Training Prepares You for Safe Gas Network Work
Completing the NRO module under SCO delivers systematic, structured training to help you master tasks outside routine scope. Key outcomes include:
- Ability to recognise whether a job qualifies as a routine or non‑routine operation based on risk, system state, and complexity
- Best practice for completing and managing NRO documentation, including risk‑assessment, task planning, roles assignment & control measures.
- Clear understanding of responsibilities: who plans, who authorises, who executes and who supervises NRO tasks.
- Risk‑based approach aligned with IGEM/GL/6 guidance, ensuring any deviation from standard procedure is treated properly with control measures or escalation.
- Preparation for emergencies, contingencies, and deviation protocols — vital when working under pressure or on live systems.
Once you successfully pass the training and assessment, you become eligible for EUSR registration for NRO, valid for five years.
If you’d like to get certified, you can view and book the SCO NRO course with Jason Rowley Training.
When Should You Book NRO Training?
Consider booking when:
- Your job involves any non‑standard, high‑risk or pressure‑related work on the gas network.
- You hold previous SCO modules (Core, Permit to Work) and need full coverage for NRO tasks.
- Your employer nominates you as a Competent Person or Authorising Engineer for upcoming operations.
- Your existing NRO registration is close to expiry or you expect renewal or upgrade.
Because failing to hold valid NRO credentials may prevent access to sites or result in non‑compliance, early action is wise rather than waiting until the last moment.
Risk and Consequences of Unqualified Non‑Routine Work
Carrying out non‑routine work without proper NRO training and registration puts everyone at risk, workers, network integrity, and public safety. Consequences may include:
- Denial of site access by gas network operators
- Breach of safety regulations under IGEM/GL/6, risking legal or regulatory action
- Increased chance of accidents or system failures due to inadequate hazard control
- Contractual issues, project delays or reputational damage for contractors or employers
NRO registration under SCO is not optional if you work in those high‑risk sectors; it is essential for legal compliance and safe operations.
Book SCO NRO Training with Jason Rowley Training
At Jason Rowley Training, we deliver the full NRO module under SCO, with structured training, experienced tutors, and clear scheduling.
- Course format: face-to-face classroom training (as required by SCO initial programme)
- Small group sizes for individual support
- Written and scenario-based assessments to reflect real-world requirements
- Fast processing for EUSR registration and valid NRO certification
If you or your team needs NRO certification or a renewal, book here or contact us to discuss tailored dates and group bookings.
