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The Knowledge Base for LEV

EH40 – Workplace Exposure Limits 2005 (2020 edition).

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This latest version of EH40 (4th Revision; 2020) has been updated to include new, revised and updated Workplace Exposure Limits (WELs) for the following substances:- ■  Hardwood dusts (including mixed dusts) ■  Chromium (VI) compounds ■  Refractory ceramic fibres ■  Respirable crystalline silica ■  Vinyl chloride monomer ■  Ethylene oxide ■  1,2-Epoxypropane ■  Acrylamide ■ …

SHAPA ATEX Technical Paper (updated)

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SHAPA Practical Guidance for Suppliers and Operators of Solid Handling Equipment for Potentially Explosive Dusts. Taken from the foreword: It is the policy of the SHAPA technical committee to systematically review the technical papers & presentations listed in the “Technical Advise” section of its website. The following Practical Guidance for Suppliers and Operators of Solid…

HSE Update: Welding fume

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Earlier in 2019, the HSE released their bulletin announcing that Mild Steel welding fumes was now classed as carcinogen.  This put Mild steel welding into the same category as Stainless and Galv welding (just to name a few examples). The announcement didn’t come with any clear advice on control.  The HSE have reacted to criticism…

Breathe Freely_Welding Fume Control Selector Tool

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An online Welding Fume Control Selector Tool In light of the HSE’s bulletin announcing Mild Steel welding as a carcinogen, Breathe Freely have supplied this web-tool.  It is designed to complement the information on the Breathe Freely in Manufacturing webpages. It provides guidance on welding fume control for common welding tasks. A panel of experts…

HSG258; Controlling airborne contaminants at work; A guide to local exhaust ventilation (LEV)

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Controlling airborne contaminants at work; A guide to local exhaust ventilation (LEV) Third Edition, Published by HSE 2017 This is HSE’s current guide on LEV and related topics.  Here you will find recommended Duct Velocities, Captor Velocities, Face Velocities, and other design criteria. The various types of hoods, filters, fans and discharges are all described….

HSE RR1126 – In-Cab Air Filtration in Plant Vehicles to Control Exposure to Hazardous Dust

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This Research Report (RR1126) by HSE, published in 2018 looked at the factors that influence the effectiveness of in-cab air filtration systems throughout their operational lifecycle, including system design, in-service use, and maintenance. The research included developing a new scientific method to evaluate filtration system efficiency whilst a vehicle is being driven. The research found:…

Measurement of Capture Efficiency of On-Gun Extraction for Welding (LVHV)

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HSE sponsored Research Report RR1010 (2014) undertaken by HSL. Key Messages from this Report:- Two test methods for measuring the efficiency of integral on-gun welding fume extraction systems have been devised and assessed. As a result, Method 1 has been selected and is currently being developed by technical committee CEN/TC 121/SC 9/WG 4 (Testing and…

ACGIH Manual of Recommended Practice for DESIGN: NEW 30th Edition!!

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NEW 2019 EDITION! NOW AVAILABLE! Now in its 30th Edition Since the 26th Edition, this industry standard LEV Manual has undergone several major changes and upgrades Additions include chapters on – “Organization and Evaluation of Systems”; “Metric Solutions and Tables”; and “Calculation Sheets and Methods”. This (2019) 30th Edition, incorporates changes in many of the…

Welding Fume IARC Monograph 118

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In February 2019 HSE announced that Welding Fume was to be considered a human carcinogen.  This has had a major impact across a wide range of industries and employers. Questions are arising as to what elements of the welding ‘fume’ are implicated and what control responses would be appropriate. This Monograph is the original document…

HSE – Welding Fume – Changes in Enforcement

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In February 2019 HSE released a Press Note which advised of the new health warning status of welding fume.  The main points made were:- New scientific evidence that exposure to all welding fume, including mild steel welding fume, can cause lung cancer. Also limited evidence linked to kidney cancer. Now a change in HSE enforcement…