Dust Extraction System – LEV Thorough Examinations

Dust Extraction Systems Within Industry

Dust extraction Local Exhaust Ventilation (LEV) systems are engineered controls designed to capture and remove airborne dust at source before it can disperse into the workplace. They are essential in industries such as woodworking, metal fabrication, construction product manufacturing, food processing, pharmaceuticals, and recycling, where processes generate fine dusts that can pose serious health, safety, and fire risks.

The primary function of a dust extraction LEV system is to control inhalation exposure by drawing dust-laden air into capture hoods, enclosures, or tool-connected extraction points. From there, the air is conveyed through ductwork to a collection unit, such as a cyclone, bag filter, or cartridge filter. Effective system design is critical, as dust particles vary in size, weight, and explosibility, all of which influence airflow requirements and filtration methods.

Dust extraction systems must be capable of maintaining sufficient transport velocity within ductwork to prevent dust from settling and accumulating. Poorly designed or unbalanced systems can allow dust build-up, leading to reduced performance, increased fire risk, and potential secondary explosions. Changes such as additional machines, blocked filters, or damaged ducting can significantly reduce system effectiveness without obvious warning.

Under the Control of Substances Hazardous to Health (COSHH) Regulations 2002, dust extraction LEV systems must be properly maintained and thoroughly examined and tested at least every 14 months by a competent person. The statutory examination confirms that airflow, capture effectiveness, filtration performance, and system integrity remain suitable for controlling exposure to hazardous dusts. For combustible dusts, additional considerations around explosion risk and safe discharge are also important.

When correctly designed, used, and regularly examined, dust extraction LEV systems play a vital role in protecting worker health, reducing housekeeping issues, and supporting legal compliance. They also help organisations manage fire and explosion risks while maintaining a cleaner, safer, and more efficient working environment.

What’s covered during your SEIS Thorough Examination.

Here’s a detailed breakdown of what is covered during an inspection and testing of a Dust Extraction LEV System, in accordance with COSHH2002 Regulation 9. The purpose is to ensure the system is safe, serviceable, and fit for purpose. Below is an in depth description of how your equipment is thoroughly examined;

LEV Inspection Procedure

A COSHH 2002 LEV inspection of a dust extraction LEV system—formally known as a thorough examination and test—is carried out to confirm that the system continues to effectively control exposure to hazardous dusts at source. Because dust extraction systems also present fire and explosion risks, the inspection assesses both health protection and system safety.

Below is a clear overview of what is covered during a statutory LEV inspection of a dust extraction system.

Capture Point and Hood Effectiveness

The inspection assesses whether hoods, enclosures, or tool-connected extraction points are:

  • Correctly positioned relative to dust generation

  • Effectively capturing dust at source

  • Suitable for the process being carried out

Air velocities are measured at capture points to ensure adequate dust pick-up before dispersion occurs.

Airflow and Transport Velocity

Airflow measurements are taken throughout the system to confirm:

  • Adequate volume flow rates at each branch

  • Sufficient transport velocity in ductwork to prevent dust settlement

  • No significant imbalance caused by blockages, leaks, or system changes

Maintaining correct transport velocity is critical to prevent internal dust accumulation.

Ductwork Condition and Cleanliness

Ductwork is examined for:

  • Leakage, corrosion, or mechanical damage

  • Internal dust build-up or blockages

  • Poorly sealed joints or access panels

Dust accumulation within ductwork can reduce performance and increase fire or explosion risk.

Filtration and Dust Collection Equipment

The inspection covers dust collection components, including:

  • Filter type and suitability for the dust being handled

  • Filter condition, loading, and integrity

  • Evidence of filter bypass or leakage

  • Safe dust discharge or waste collection arrangements

Poor filtration can reduce airflow and allow dust to escape back into the workplace.

Fans and Mechanical Components

The extract fan is checked for:

  • Correct operation and performance

  • Signs of wear, vibration, or overheating

  • Secure mounting and guarding

Fan performance is reviewed in relation to measured airflow results.

Explosion and Fire Safety Features (Where Applicable)

For combustible dusts, the inspection considers:

  • Condition of explosion relief panels or suppression systems

  • Earthing and bonding of ductwork

  • Potential ignition sources within the system

These checks support wider safety and DSEAR considerations.

Controls, Indicators, and Monitoring

System controls and indicators are examined, including:

  • On/off controls and interlocks

  • Pressure gauges or airflow indicators

  • Warning devices or alarms

These features help users identify reduced system performance.

Suitability for Current Processes

The inspection considers whether the system remains suitable for:

  • The type and quantity of dust generated

  • Changes to processes or materials

  • Additional machines connected since commissioning

Process changes are a common cause of reduced LEV effectiveness.

Statutory Reporting and Documentation

Finally, a written report of thorough examination and test is produced, detailing:

  • Test methods and results

  • Identified defects or performance issues

  • Clear conclusions on system effectiveness

  • Required remedial actions and timescales

This report is a legal requirement under COSHH and must be retained for inspection.

 Summary

An LEV Thorough Examination ensures that the system is safe, compliant, and fit for use. It helps prevent accidents and work place illnesses caused by poorly maintained, or poorly operating systems. While it does not replace regular maintenance, PUWER and LEV (COSHH2002) inspections are a crucial legal requirement for keeping your working operations safe and avoiding costly breakdowns or incidents.

Why Dust Extraction LEV System Thorough Examinations Matter For You & Your Business. 

Why COSHH2002 Thorough Examinations Of LEV Systems Matter

COSHH2002 LEV thorough examinations are a legal requirement in the UK for all Local Exhaust Ventilation equipment used at work, and for good reason. These inspections ensure that LEV equipment, such as fume cupboard, receiving hoods, spray booths, and captor hoods are safe to use, and fit for purpose. The environments of LEV equipment is required means that equipment failure can lead to catastrophic consequences, including serious injury, respiratory issues, work place illness and in the long term, fatalities. By carrying out regular, scheduled thorough examinations by a competent person, businesses can identify wear and tear, structural damage of ducting, or faulty mechanisms before they result in an incident.

Pros of Getting an LEV Thorough Examination in line with COSHH2002

Legal Compliance and Risk Reduction: The most obvious advantage is staying compliant with health and safety law. Compliance avoids potential legal action, fines, or even prosecution. More importantly, it drastically reduces the risk of workplace accidents caused by lifting equipment failure.

Improved Safety Culture: Regular inspections foster a proactive safety culture within the organisation. Employees are more likely to trust equipment and feel safe in their work environment when they know thorough checks are in place.

 Extended Equipment Lifespan: Regularly maintained and inspected equipment typically lasts longer. Examinations can identify early signs of damage or fatigue, allowing for preventative maintenance that avoids costly replacements or repairs.

 Insurance and Liability Protection: Insurers may require evidence of LOLER compliance in the event of an incident. Without valid inspection records, insurance claims could be denied or reduced, leaving the business liable for damages.

 Operational Efficiency: Detecting potential issues before they lead to equipment failure helps prevent unscheduled downtime. This keeps operations running smoothly and avoids the knock-on effects of delayed projects or interrupted workflows.

Cons of Failing to Carry Out COSHH2002 LEV Thorough Examinations

 Legal and Financial Consequences: Failing to comply with COSHH2002 can result in enforcement action from the Health and Safety Executive (HSE), including improvement notices, prohibition notices, fines, or even prosecution. Legal battles and associated costs can be financially crippling.

 Increased Risk of Accidents: Equipment that hasn’t been thoroughly examined is far more likely to fail. Such failures can lead to injuries or fatalities, particularly in high-risk environments like construction or manufacturing. Beyond the human cost, the reputational damage to a business can be severe and long-lasting.

 Higher Repair and Replacement Costs: Neglecting inspections can allow minor issues to develop into major faults. These may require costly emergency repairs or complete equipment replacement, expenses that could have been avoided through routine examinations.

 Loss of Business and Clients: Clients often expect their contractors or suppliers to uphold strict safety standards. A failure to meet legal obligations like COSHH2002 can result in lost contracts or blacklisting from future work, especially in regulated industries.

 Increased Insurance Premiums or Invalidated Coverage: As mentioned, insurers may increase premiums or deny coverage entirely if a business can't provide evidence of up-to-date COSHH2002 compliance, placing a heavier financial burden on operations.

LEV thorough examinations aren’t just a box-ticking exercise - they are an essential component of a responsible, safety-first approach to using lifting equipment. The benefits of compliance are wide-ranging, from protecting human life to reducing costs and maintaining operational integrity. Conversely, the risks of neglecting these inspections can be devastating on multiple levels.

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