The design and operation of plants for the production, storage and handling of lubricant oils present complex technical challenges, particularly in the areas of safety and operational reliability. In this context, the adoption of proven best practice, together with the integration of advanced technologies, is essential to minimise risks, ensure continuous service, comply with the regulations currently in force and meet the strictest requirements of the end customer, providing a significant competitive advantage.
While lubricant oils are not always classified as hazardous substances on the same level as solvents or fuels, they do present risks related to flammability, spillage, environmental contamination and quality degradation. For companies like Granzotto, which specialise in the design and installation of fluid handling plants, the challenge is to combine production efficiency and regulatory compliance while ensuring the protection of staff, the environment and company assets.
Table of Contents
Critical issues in lubricant oil plants
The management of industrial lubricant oils involves a series of critical issues that must be addressed at the design stage.
Fire risk
Mineral oils with a flash point above 125°C (with viscosity of more than 2° Engler at 20°C and distillate at 300°C) are classified as lubricants. Industrial oils between 65°C and 125°C fall into the category of combustible minerals and are regulated by fire safety legislation (Ministerial Decree of 31 July 1934 and subsequent updates). Consequently, they can create potentially explosive atmospheres where ignition sources are present.
Leaks and contamination
Leaks from pipes, valves or tanks can cause environmental pollution and risks for operators.
Moreover, fluid contamination (particles, water, oxidation) could compromise lubrication properties and cause premature machine failure.
Mechanical failures
Pumps, seals and valves are subject to wear and thermal stress. A failure can lead to plant downtime or uncontrolled release of oil.
Staff safety
Manual loading/unloading, maintenance or cleaning operations are associated with risks of burns, skin contact, inhalation and falling.
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Regulatory framework
The design and management of the plants must consider a variety of regulations and technical standards.
- Ministerial Decree 31 July 1934 – Safety standards for the processing, storage and sale of mineral oils.
- Fire safety regulations – Oils with a flash point > 125 °C are classified as non-hazardous liquids, while those below this threshold are subject to fire prevention measures (e.g. activities 12 and 13 of Presidential Decree 151/2011).
- Legislative Decree 81/2008 – Occupational safety: obligation to assess risks, emergency procedures, PPE.
- ATEX standards (Directives 2014/34/EU and 99/92/CE) – Applicable if the oil can generate inflammable atmospheres under particular conditions.
- IEC 61508 and IEC 61511 – International standards on the functional safety of control systems.
- ISO 4406 – Classification of particle contamination in oils.
- ISO 45001 – Occupational health and safety management systems.
Compliance with these standards not only guarantees the safety of the plant, but also its long-term reliability and legal protection for the company.
Regulatory framework
The design and management of the plants must consider a variety of regulations and technical standards.
- Ministerial Decree 31 July 1934 – Safety standards for the processing, storage and sale of mineral oils.
- Fire safety regulations – Oils with a flash point > 125 °C are classified as non-hazardous liquids, while those below this threshold are subject to fire prevention measures (e.g. activities 12 and 13 of Presidential Decree 151/2011).
- Legislative Decree 81/2008 – Occupational safety: obligation to assess risks, emergency procedures, PPE.
- ATEX standards (Directives 2014/34/EU and 99/92/CE) – Applicable if the oil can generate inflammable atmospheres under particular conditions.
- IEC 61508 and IEC 61511 – International standards on the functional safety of control systems.
- ISO 4406 – Classification of particle contamination in oils.
- ISO 45001 – Occupational health and safety management systems.
Compliance with these standards not only guarantees the safety of the plant, but also its long-term reliability and legal protection for the company.
Best design practices
Risk analysis and preliminary assessments
The design of each plant must be preceded by an equivalent risk assessment to identify hazardous situations, possible failures and appropriate countermeasures.
Containing leaks
Tanks and container basins must be sized in compliance with regulations. Double-walled pipes or piping systems with leak sensors and automatic shut-off valves that intervene in the event of breakages on the line must be installed.
Choice of materials and equipment
Pumps capable of reducing the risk of leaks from mechanical seals, valves and gaskets made of materials compatible with the type of oil and operating temperatures must be chosen, along with in-line filters to reduce contamination.
Automation and control
The automation and control of a lubricant oil production and handling plant require the installation of pressure, level, temperature and flow sensors with redundancy at critical points, the use of SCADA systems for central monitoring and data logging, and integrated emergency shutdown (ESD) systems.
Fire prevention
Plants must be equipped with an automatic sensing and extinguishing system (sprinklers, foam, inert gases, depending on requirements) in addition to compartmentalisation in compliance with regulations, and forced ventilation in closed areas where there is a risk of formation of fumes.
Procedures and training
Clear operating manuals for start-up, shut-down and emergency situations must be supplied for every plant, with regular training for operators and simulations with fire and evacuation drills.
Preventive and predictive maintenance
It is important to properly plan maintenance, with scheduled interventions on pumps, valves and tanks, and to envisage regular checks on the system fluids to detect any possible alterations in their physical characteristics that could cause the pipes to become worn. Thermography and vibration testing can be used to identify imminent mechanical failures.
Innovative technologies to support safety and reliability
In addition to design practices, there are advanced technologies that can increase the level of protection, operability and reliability.
CIP (Cleaning In Place) and Pigging systems
CIP systems allow internal cleaning of pipes and tanks without dismantling them, reducing risks for operators and also downtime, while the installation of a pigging system allows the recovery of oil residues and the emptying of lines, reducing waste and improving safety, efficiency and the quality of the final product.
Leak detection and liquid monitoring systems
Capacitive, optical or ultrasound sensors installed in basins, channels or internal walls, integrated with alarm systems and automatic shutdown.
Temperature monitoring systems
Heat sensors to identify hot spots or critical areas in a non-invasive and continuous manner.
Digitalisation and IIoT
Connected smart sensors for data analysis, integrated with business management systems for reporting and auditing.
Functional safety systems (SIS)
Redundant architectures that guarantee intervention in the event of critical failures. They manage functions such as valve closure, pump shutdown or fire -fighting system activation.
Automatic valves
Valves with built-in sensors that monitor position (open/closed) and communicate useful information to the central control system.
Advanced materials and special coatings
The use of special steels, high-temperature resistant alloys and wear-resistant coatings can extend the service life of equipment and reduce the risk of sudden failures.
Advantages of an integrated approach: best practice and supporting technologies
Safety and reliability in lubricant oil production and handling plants require an integrated approach, starting with a thorough risk analysis, followed by design based on proven best practice and culminating in the adoption of advanced technologies.
A plant designed and installed in this way guarantees:
- reduced risks for staff;
- greater operational continuity, with fewer unplanned downtimes;
- regulatory compliance and reduction of penalties or disputes;
- cost savings thanks to fewer leaks and more efficient maintenance;
- longer asset life and better quality of the final product.
Investing in safe systems today means not only protecting people and the environment but also ensuring the competitiveness and continuity of industrial production tomorrow.
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