1. Introduction: Overview of the Chemical Industry and MRO Challenges
The chemical industry (CH) is a fundamental industry that provides raw materials and products to a wide range of sectors of the Ukrainian economy - from agrochemistry and pharmaceuticals to construction and energy. The production of chemicals, polymers, fertilizers and other complex compounds requires continuous, highly controlled processes that often take place under extreme conditions: high temperatures, pressures and aggressive chemical environments. This creates unique and complex challenges for maintenance, repair and operation (MRO).
Key issues are equipment corrosion, erosion, wear and tear of moving parts, material aging and the risk of unplanned downtime. Any failure can lead not only to significant financial losses due to production downtime, but also to serious environmental and safety consequences. Therefore, ensuring the flawless operation of the equipment, its durability and safety is an absolute priority. In this context, choosing reliable, certified components such as FIBRO ATS355 is crucial to optimize operational efficiency and minimize risks.
2. Critical Components: Role of FIBRO ATS355 and Related Elements
FIBRO ATS355, as a high-precision guide element, plays a key role in ensuring the stability and accuracy of moving nodes in critical HP equipment. Manufactured from high-quality hardened steel that complies with the ISO 8977 standard (Materials for guide elements), the ATS355 provides minimal backlash, high wear resistance and accurate positioning throughout its service life. This is critical for metering systems, precision presses, or reactor loading/unloading mechanisms, where micrometer deviations can affect end product quality or process safety.
In addition to FIBRO ATS355, the following critical components certified by CE and UkrSEPRO standards are widely used in the chemical processes of Ukraine:
- Centrifugal pumps (according to DSTU EN ISO 9906): Provide pumping of liquids and suspensions. For example, models with stainless steel housings (AISI 316L) for aggressive environments.
- Ball valves (according to DSTU EN 12516-1): For quick and reliable shut-off of flows. Often used with pneumatic or electric drives.
- Plate heat exchangers (according to DSTU EN 13445): Effective for controlling the temperature regimes of reactions. Used in cooling and heating systems.
- Mechanical seals (according to ISO 3069): Prevent leaks in pumps, agitators and reactors. They are especially important for working with toxic or volatile substances.
- Flow meters (according to DSTU EN ISO 5167): For accurate flow measurement of liquids and gases, which is key to recipe control and process optimization.
3. Typical Scheme of the Industrial Enterprise of KhP
Consider a typical polymer production scheme, where FIBRO ATS355 and related components play a decisive role:
- Raw material preparation station:
- Raw materials (monomers, initiators) are stored in tanks.
- Centrifugal pumps (capacity 50-200 m³/h, pressure up to 16 bar) pump it through filters (pore size 5-50 μm) to mixing tanks.
- Flow meters control the accuracy of feeding with an error of up to ±0.5%.
- Reactor block:
- The main stage of polymerization takes place in reactors (volume 5-50 m³, pressure up to 25 bar, temperature 80-250 °C).
- Mechanical seals ensure the tightness of the agitator shafts.
- Plate heat exchangers (heat exchange area 10-100 m²) maintain an optimal temperature.
- Precision mechanisms equipped with FIBRO ATS355 can be used in catalyst feeding systems or reactor lid opening/closing mechanisms, where high cycle repeatability accuracy is required (positioning tolerances up to ±0.02 mm).
- Separation and purification department:
- Reaction products are sent to separators and distillation columns.
- Ball valves (diameter DN50-DN200) regulate flows between columns.
- Dosing pumps (dosage accuracy ±1%) are used to introduce stabilizers or additives.
- Drying and granulation section:
- The purified polymer is dried and granulated.
- Here, the FIBRO ATS355 can be integrated into press dies or granulator moving parts positioning systems where uninterrupted operation with high loads and precise tolerances is required.
4. Modes of Failures and Impact of Downtimes
In the chemical industry, an unplanned downtime is catastrophic. Typical failure modes for critical components include:
- FIBRO ATS355: Wear of the working surface of the guide due to abrasive particles, insufficient lubrication, excessive radial loads or corrosion in aggressive environments. This leads to increased backlash, loss of positioning accuracy, jamming of the mechanism, which in turn can cause damage to expensive equipment (for example, press dies) or stop the entire line.
- Pumps: Wear of seals, bearings, cavitation, casing corrosion.
- Valves: Stem seizing, seal leakage, seat or ball element damage.
- Heat exchangers: Clogging of channels, corrosion of plates, leaks between circuits.
- Sealing: Wear, cracking from chemical exposure or high temperature, loss of tightness.
The cost of one hour of downtime in the chemical industry of Ukraine, according to analytical reports for 2024, can range from 35,000 to 75,000 euros, depending on the scale of production, type of products and lost margin. For large polymer or petrochemical industries, this figure can exceed 100,000 euros/hour. This includes direct losses from unfinished products, additional costs for repairs, scrap disposal, and possible penalties for non-fulfillment of contractual obligations. Therefore, investing in reliable components and effective MRO strategies makes economic sense.
5. Preventive vs Predictive Maintenance Strategies
Optimizing MRO in HP requires a balanced approach to two main strategies:
5.1. Preventive Maintenance (PTO)
OPT is based on the regular performance of maintenance tasks according to a fixed schedule or accumulated hours (for example, replacing the FIBRO ATS355 every 8000 hours of operation or once a year, according to the manufacturer's recommendations and ISO 17359). This strategy includes:
- Regular inspection and cleaning of FIBRO ATS355 from contamination.
- Lubrication of moving parts using specialized lubricants resistant to chemical environments and high temperatures (for example, in accordance with DSTU GOST 23258).
- Planned replacement of wearing parts (seals, pump bearings, heat exchanger gaskets) before their actual failure.
- Calibration of measuring devices (flow meters) according to ISO 10012.
Advantages of vocational training: Reducing the risk of sudden failures, extending the service life of equipment. Disadvantages: Premature replacement of functional components is possible, which leads to unjustified costs and unnecessary downtime.
5.2. Predicted Maintenance (PrTO)
PrTO uses real-time equipment condition monitoring data to predict potential failures and schedule maintenance only when necessary. This strategy follows ISO 55001 (Asset Management) and EN 13306 (Maintenance Terminology) and includes:
- Vibration diagnostics: Vibration monitoring of pump and agitator bearings to detect imbalance or wear.
- Thermography: Detection of overheating of electrical components, seals or areas of heat exchangers.
- Oil analysis: Determination of wear particles in FIBRO ATS355 grease or other moving units to assess surface condition.
- Acoustic monitoring: Detection of abnormal valve noises or leaks.
- Ultrasonic control: Detection of hidden defects in pipelines or reactor housings.
PrTO advantages: Maximum use of component resources, minimization of downtime, reduction of spare parts costs. Disadvantages: Requires significant initial investment in monitoring systems and skilled personnel.
A combination of both strategies is optimal: MOT for routine inspections and replacements, and MOT for critical equipment where the cost of downtime is the highest.
6. Case Study: Successful Restoration of Polymer Production
At one of the leading Ukrainian enterprises for the production of specialized polymers, a problem arose with the press for granulation. The accuracy of the granulation decreased significantly, which led to an increase in the percentage of scrap and a slowdown of the production cycle by 15%. Primary diagnosis by visual inspection revealed no obvious damage.
The application of a complex approach of PrTO, which included vibration analysis and analysis of wear particles in the lubricant, revealed increased vibration and the presence of metal microparticles in the area of the critical material feed mechanism. A detailed inspection showed wear on one of the FIBRO ATS355 guides operating in the assembly with a cyclic load of 100 kN and a frequency of 50 cycles/min. The cause of the wear was uneven supply of lubricant due to partial clogging of the lubrication channel, which led to local overheating and accelerated abrasive action. The current hour of downtime was estimated at 45,000 euros.
Thanks to the clear identification of the problem, the repair team was able to quickly order the original FIBRO ATS355 spare part through UNITEC-D E-Catalog, where the compliance of the component with ISO 9001 and DSTU ISO 8977. certificates was guaranteed. The replacement was completed within 12 hours of delivery. After installing a new guide and resuming the oil supply, pelleting accuracy returned to normal and production resumed full capacity. The total downtime was 18 hours, causing a loss of €810,000. However, without prompt diagnosis and access to original spare parts, the breakdown could drag on for several days, doubling or tripling the losses.
7. Management of Spare Parts for the Chemical Industry
Effective spare parts management is key to minimizing HP downtime. Given the high cost of downtime, businesses must maintain optimal inventory levels of critical components. Strategies include:
- Spare parts classification: Division into critical (FIBRO ATS355, pump seals, valve diaphragms), important (standard bearings, electric motors) and general purpose (fasteners, stuffing boxes). Critical spare parts (eg FIBRO ATS355) must always be in stock in sufficient quantities for immediate replacement, taking into account the lead time.
- Optimizing inventory levels: Using data analysis techniques (eg, ABC/XYZ analysis) to determine optimal inventory levels, taking into account supplier reliability, lead times, and storage costs.
- Centralized procurement: Partnership with reliable suppliers like UNITEC-D E-Catalog, which guarantees access to a wide range of original components (eg FIBRO, SKF, Festo) and operational logistics.
- Standardization of components: Where possible, the use of unified spare parts for different equipment to reduce inventory nomenclature.
- Exchange Programs: Participating in component recovery or exchange programs where applicable for a specific type of equipment.
For components with a long delivery time (for example, up to 4-6 weeks for some specialized pumps or heat exchangers), it is necessary to build up an emergency stock or enter into long-term agreements with suppliers that guarantee fast delivery.
8. Conclusion
The efficiency and safety of chemical production in Ukraine directly depend on the reliability of each individual component and the integrity of the MRO system. FIBRO ATS355, as a representative of high-precision guide elements, is a strong link in the chain of critical equipment, ensuring smooth operation in the most difficult conditions. The integration of such certified components, together with carefully developed VET and PrTO strategies, allows Ukrainian HP enterprises to achieve optimal productivity, minimize risks and significantly reduce operating costs, which meets the requirements of modern industry and European integration standards.
For reliable supply and access to a wide range of certified components for the chemical industry, including FIBRO ATS355 and related items, please refer to the UNITEC-D E-Catalog.
9. List of Standards and Sources
- ISO 8977:2008 – Standardized elements for guiding in die sets.
- DSTU EN ISO 9906:2019 – Centrifugal pumps. Hydraulic tests according to efficiency indicators. Accuracy classes 1 and 2.
- DSTU EN 12516-1:2017 – Industrial pipeline fittings. Shell calculation. Part 1: Method (ISO 12516-1:2004, IDT).
- DSTU EN 13445-3:2019 – Unheated pressure vessels. Part 3: Design (EN 13445-3:2014, IDT).
- ISO 3069:2019 – Dimensions of mechanical seals.
- DSTU EN ISO 5167-1:2020 – Measurement of liquid flow by means of restrictors introduced into a filled pipeline of circular cross-section. Part 1: General principles and requirements (EN ISO 5167-1:2003, IDT).
- ISO 55001:2014 – Asset management – Management systems – Requirements.
- EN 13306:2017 – Maintenance – Maintenance terminology.
- DSTU ISO 45001:2019 – Occupational health and safety management systems. Application requirements and guidelines (ISO 45001:2018, IDT).
- DSTU GOST 23258-78 – Lubricating oils, plastic lubricants, industrial oils. Methods of determining the content of mechanical impurities.
- ISO 10012:2003 – Measurement management systems – Requirements for measurement processes and measuring equipment.
- Source of data on the cost of downtime: Analytical reports "Ukrainian market of chemical products: analysis and forecasts 2024", leading consulting agencies.
