vibration HAV Myth Management www.invc.com Industrial Noise and - - PowerPoint PPT Presentation

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vibration HAV Myth Management www.invc.com Industrial Noise and - - PowerPoint PPT Presentation

Nov 08, 2023 208 likes •499 views

HAV Management Best Practice vibration HAV Myth Management www.invc.com Industrial Noise and Vibration Centre Industrial Noise and Vibration Centre Invited to present on the HSE Road-Shows across the UK to launch the current HAV and noise

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www.invc.com

Industrial Noise and Vibration Centre

HAV Myth Management

HAV Management Best Practice

vibration

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www.invc.com

Industrial Noise and Vibration Centre

  • Invited to present on the HSE Road-Shows across the UK to

launch the current HAV and noise regulations

  • The largest HAV database of accurate field values available

▪ virtual assessments as per HSE guidance

  • Developed and run the IOSH HAV competency courses

▪ the major provider of noise and HAV training in the UK

  • Developed Croner, 3M, Desoutter … HAV Documentation
  • HAV-Test tool maintenance system development
  • Vibration engineering control design and development
  • Multi-award winning noise control technologies
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www.invc.com

Vibration Management Programme

The objective is to establish and implement "Best Practice" for each of these elements – in your particular circumstances.

  • Identify potential hazardous tools and operations

▪ list tool types, models, manufacturers + "jobs“

  • Assess risks for tools and operations

▪ representative sample + published data

  • Train managers, supervisors and operators
  • Implement Risk Reduction Programme

▪ PPE, ergonomics, operating conditions, maintenance, engineering

modifications .....

  • Buy Smooth

▪ implement vibration purchasing policy

  • Health Surveillance Programme

▪ where A(8) exposure likely to be > 2.5m/s2)

  • Audit Programme
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Changing Personal Behaviour...

16m/s2: 12 minutes re 2.5m/s2; 48 minutes re 5m/s2. VWB…

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The Major Myths

  • PPE for HAVS

an oxymoron

  • Tool maintenance vibration measurements

merit-free measurements

  • Vibration control at source

…is not possible…

  • Vibration measurement and risk assessment

placebo monitoring, mis-measurement and marketing hype...

  • Buy / hire smooth

caveat emptor

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www.invc.com

The Major Myths

  • PPE for HAVS

an oxymoron

  • Tool maintenance vibration measurements

merit-free measurements

  • Vibration control at source

…is not possible…

  • Vibration measurement and risk assessment

placebo monitoring, mis-measurement and marketing hype...

  • Buy / hire smooth

caveat emptor

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www.invc.com

"Anti-Vibration" Glove PR

ISO 10819:2013(en): Mechanical vibration and shock: measurement and evaluation of the vibration transmissibility of gloves at the palm of the hand. Introduction: “…gloves normally provide little reduction in hand-transmitted vibration at frequencies below 150 Hz …can increase the vibration transmitted to the hands at these low frequencies...”

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www.invc.com

The Major Myths

  • PPE for HAVS

an oxymoron

  • Tool maintenance vibration measurements

merit-free measurements

  • Vibration control at source

…is not possible…

  • Vibration measurement and risk assessment

placebo monitoring, mis-measurement and marketing hype...

  • Buy / hire smooth

caveat emptor

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www.invc.com

Optimising Tool Maintenance

Use HAV-Base statistics to evaluate the effect that maintenance has on the levels of vibration for the various categories of tool and use this information to optimise your tool maintenance. Use operator experience to determine when a tool should go for maintenance – they will know…

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www.invc.com

The Major Myths

  • PPE for HAVS

an oxymoron

  • Tool maintenance vibration measurements

merit-free measurements

  • Vibration control at source

…is not possible…

  • Vibration measurement and risk assessment

placebo monitoring, mis-measurement and marketing hype...

  • Buy / hire smooth

caveat emptor

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Vibration Control at Source

Mould filling: recommendations based on this video reduced the vibration from 28m/s2 down to 11.5m/s2. Use extended from 15 minutes to 1 hour 28 minutes/day

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Commercial Pressure - Low Vibration Plant Design

Manufacturers are under increasing pressure to develop low vibration plant. In

the case of Dennis, our prototype re-designed low vibration handle reduced

  • perator exposure during simulated cutting from 5 - 6m/s2 down to 1 - 2m/s2

without affecting mower control.

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www.invc.com

The Major Myths

  • PPE for HAVS

an oxymoron

  • Tool maintenance vibration measurements

merit-free measurements

  • Vibration control at source

…is not possible…

  • Vibration measurement and risk assessment

placebo monitoring, mis-measurement and marketing hype...

  • Buy / hire smooth

caveat emptor

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Measurement and Measurement and Accuracy

5 4 2.5

CoVaWR 2005 m/s2 A(8) Daily Dose Exposure Action Value - EAV

Where exposure is likely to exceed this Action Value:- Implement a HAV management programme to reduce exposure and risks Provide appropriate health surveillance

Exposure Limit Value - ELV

Exposure must be kept below this Limit Value

Much of the industry has a "risk measurement" culture, with assessment as an end in itself rather than as a precursor to the more challenging action to reduce

  • risk. Do not carry out placebo

measurements, take action… "If you are paying suppliers or consultants to measure your tool vibration every year or two, it's very good business for them, but completely unnecessary..."

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Measurement v Virtual Assessment

UK HSE Guidance and Recommendations:-

  • use reliable published field vibration data for risk assessments

wherever possible

  • companies should spend time and resources reducing risk rather than

placebo assessments based on re-measuring tools for which accurate field data is already available or reassessing tools or activities for which they already have good data Important Note

  • It is often only necessary to carry out a full HAV assessment once.

Unless you change the tools, the time or the way they are used, there is no need to reassess – just update. This fundamentally affects the economics of purchasing vibration monitoring equipment. e.g. noise assessments have to be reviewed at least every 2 years. Will additional measurements affect your risk reduction actions? http://www.invc.com/noise/vibration/handarm-vibration/#havbase

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Template Tool Register

Necessary part of best practice + approved tool list…

Free open source copy available at www.invc.com/noise/vibration/handarm-vibration/

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HAV and Noise Assessment Online Database

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Faulty Measurement Results

Manufacturer: 5m/s2 Consultant (jubilee clip): 5 – 45m/s2 Meter supplier (tie wrap): 2m/s2 4 operators with HAV symptoms. Help! INVC (band clamp): 1.9 - 5m/s2 Why the difference? We traced the problem to a faulty sensor that mis-read for high frequency vibration but OK for lower amplitude sinusoidal vibration. Field data lower than declared value! Many HAV meter users measure by “rote” without taking the necessary steps to ensure that the results are accurate. Press the button, write down the result… Hand held transducers Transducers strapped on with tape Transducers loosely mounted Transducers at the wrong location One transducer axis dead Cable faults – intermittent readings averaged Etc, etc…

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Mis-Measurement

None of these alternative measurement techniques can be used for a reliable assessment (re BS5349) of the levels of vibration to which operators are

  • exposed. Period. Very simples…

HAV measurement white paper via

www.invc.com/wrist-mounted-vibration-transducers-not-again/ HSE Guidance 2017 “Hand-arm vibration measurements should be made with the transducer firmly attached to the vibrating surface… There is currently no wrist or glove mounted device which measures vibration suitable for use in a vibration risk assessment.” Continuous Monitoring Don’t unless you can prove that the cost is justified, especially on lower risk activities. Assess if circumstances warrant the usefulness of collecting monitoring data re reduced exposure. Will additional measurements affect your risk reduction actions?

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Mis-Measurement

Reactec HAVSCo CVK None of these alternative measurement techniques can be used for a reliable assessment (re BS5349) of the levels of vibration to which operators are

  • exposed. Period. Very simples… For example…
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Mis-Measurement

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Mis-Measurement

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Mis-Measurement: ASA Ruling

ASA Ruling: We considered that because we had seen evidence that wrist mounted transducers did not measure hand-arm vibration in accordance with the Standard, did not provide ELV or EAV data that was required by the Regulations and were not therefore suitable for risk assessments of hand-arm vibration as set out by the Regulations… Full ruling at: www.asa.org.uk www.invc.com/wrist-mounted-vibration-transducers-not-again/

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The Major Myths

  • PPE for HAVS

an oxymoron

  • Tool maintenance vibration measurements

merit-free measurements

  • Vibration control at source

…is not possible…

  • Vibration measurement and risk assessment

placebo monitoring, mis-measurement and marketing hype...

  • Buy / hire smooth

caveat emptor

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www.invc.com

Buy / Hire Smooth Policy - Hirer Beware...

The Hire Association Europe introduced a "traffic light" system for grading tool vibration levels against the Exposure Limit Value.

  • based on manufacturers' declared laboratory data

The colour coding implies that "green" tools do not pose a significant HAV risk. Many of these tools would be classified as "amber" or "red" if categorised according to field vibration data.

  • only use this grading as an initial guide - do not use it as the

basis for risk assessment "Amber" rock drill (hirer catalogue extract) - ".. 5-10m/s2, up to 2 hours use without further risk assessment .." 12-24m/s2 INVC field measurements on these drills at the hirer - 5 minutes to reach Action Value, 20 minutes to reach Limit Value!

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www.invc.com

The Major Myths

  • PPE for HAVS

an oxymoron

  • Tool maintenance vibration measurements

merit-free measurements

  • Vibration control at source

…is not possible…

  • Vibration measurement and risk assessment

placebo monitoring, mis-measurement and marketing hype...

  • Buy / hire smooth

caveat emptor

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www.invc.com

Peter Wilson: +44 (0) 1753 698800 - +44 (0) 7785 265660 pw@invc.co.uk www.invc.com

  • HAV Master Class workshop
  • HAVBase / NoiseBase: online automated risk assessment
  • IOSH competency courses
  • HAV management best practice audits
  • HAV measurements
  • Vibration control engineering

HAV Management Best Practice