
LEV Testing
To ensure you are fully compliant with new HSE and COSHH regulations WB Alloys can provide fully qualified engineers nationwide to undertake Local Exhaust Ventilation LEV Testing and maintenance in accordance with BOHS P601, Compliance with COSHH Regulations.
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All Local Exhaust Ventilation (LEV) systems and control equipment must be thoroughly examined and tested every 14 months to investigate their extraction functionality and operational protection against pollution exposure to the workforce. WB Alloys have LEV engineers based in Aberdeen and Glasgow.
WB Alloys will provide a full detailed report including any recommendations – change of main or pre filter, repair of trunk and tightening of any flexible or rigid exhaust arms. We will manage and maintain your extraction units notifying 30 days before they are next due for LEV testing.
WB Alloys can supply, install & fully support Kemper fume extraction systems. We have a wide range of outdoor based systems, wall mounted units, mobile units, self-cleaning machines & on torch extraction machines. Contact your local WB Alloys representative today to arrange a site visit to advise the best solutions for you and to ensure compliance.
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WB Alloys operates as an authorised KEMPER repair centre, boasting certified engineers proficient in the meticulous inspection and repair of KEMPER extraction systems and Local Exhaust Ventilation (LEV), adhering strictly to BoHS P601 standards.
It is imperative to note that repairs conducted by non-certified KEMPER agents will render any existing warranties and purchase agreements null and void.
You can control risks to health from welding fumes by:
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Local exhaust ventilation (LEV)
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Respiratory protective equipment (RPE) and personal protective equipment (PPE)
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Maintaining control measures and good general ventilation
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Making sure welders understand the risks and how to use controls.
LEV - Frequently asked questions
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On-Torch Extraction Solutions for Welding Fume Control

On-torch extraction is one of the most effective ways to control welding fumes directly at the source. Instead of relying on general fume extraction systems, this solution captures hazardous fumes through the welding torch itself, helping businesses maintain compliance with LEV testing requirements and UK COSHH regulations.
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Modern on-torch extraction systems are designed to remove dangerous welding fumes, gases, and airborne particles before they spread into the workplace. The extraction nozzle is integrated into the welding torch and connected to a Local Exhaust Ventilation (LEV) system, ensuring contaminants are safely captured and filtered.
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Why Use On-Torch Fume Extraction?
Welding fumes can contain harmful substances such as metal oxides, gases, and fine particulates. Without effective fume extraction and LEV control, these contaminants can pose serious health risks to workers.
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An on-torch extraction solution provides:
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Source capture of welding fumes directly from the arc
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Improved air quality in welding environments
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Better compliance with COSHH and LEV testing regulations
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Reduced exposure to hazardous welding fumes
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A safer and cleaner workspace for welders
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Because the extraction takes place at the point where fumes are generated, on-torch extraction systems are often more efficient than overhead or general ventilation systems.
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On-Torch Extraction and LEV Testing
Like all Local Exhaust Ventilation systems, on-torch extraction equipment must be regularly inspected and tested to ensure it continues to perform effectively. Under COSHH regulations, LEV systems must undergo a thorough examination and test at least every 14 months.
Professional LEV testing services assess airflow performance, system condition, and overall efficiency of your welding fume extraction system, ensuring it meets required safety standards.
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On-Torch Extraction for Industrial Welding
On-torch extraction is widely used in industries such as:
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Engineering and fabrication
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Automotive manufacturing
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Heavy industry and metalworking
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Shipbuilding and offshore fabrication
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Manufacturing and production facilities
By combining on-torch extraction technology with regular LEV testing and inspection, businesses can ensure their welding operations remain compliant, safe, and efficient.
What is LEV ?
LEV (Local Exhaust Ventilation) testing refers to the process of evaluating the effectiveness and performance of local exhaust ventilation systems.
These systems are designed to control hazardous substances in the workplace by capturing, containing, and exhausting emissions at the source before they can be inhaled by workers.
LEV testing ensures that the system is functioning correctly and providing adequate protection against exposure to harmful contaminants.

Key Aspects of LEV Testing:
Airflow Measurement
Velocity Testing. Measuring the speed of air at various points in the system to ensure it meets the required specifications.
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Volume Flow Rate.
Determining the amount of air being moved by the system, typically measured in cubic meters per hour (m³/h) or cubic feet per minute (CFM).
Visual Inspection
Checking for physical damage, wear and tear, and proper installation of the system components, including hoods, ductwork, filters, and fans.
Smoke Testing
Using smoke to visualise airflow patterns and ensure that contaminants are being effectively captured at the source.
Static Pressure Testing
Measuring the pressure within the ductwork to ensure there are no blockages or leaks and that the fan is operating efficiently.
Filter and Contaminant Capture Efficiency
Evaluating the performance of filters and other capture mechanisms to ensure they are effectively removing contaminants from the air.
Compliance with Standards
Ensuring the system meets relevant regulatory standards and guidelines, such as those set by the Occupational Safety and Health Administration (OSHA) or the Health and Safety Executive (HSE).
Benefits of LEV Testing:
Health and Safety
Protects workers from inhaling hazardous substances, reducing the risk of occupational illnesses.
Regulatory Compliance
Helps businesses comply with health and safety regulations, avoiding potential fines and legal issues.
System Efficiency
Ensures the LEV system is operating efficiently, which can reduce energy costs and prolong the lifespan of the equipment.
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Workplace Productivity
By maintaining a safer and healthier work environment, businesses can improve overall productivity and employee well-being.
Regular LEV testing is a crucial part of maintaining a safe working environment, particularly in industries where hazardous substances are handled, such as manufacturing, laboratories, and construction.
