Effective design and management of LEV systems

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An outline of the principles and practice of effective design and management of local exhaust ventilation systems.

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Effective design and management of LEV systems

  1. 1. LEV
  2. 2. LocalEV
  3. 3. LocalExhaustV
  4. 4. LocalExhaustVentilation
  5. 5. LocalExhaustVentilation
  6. 6. Local Exhaust Ventilation stack hood ducting air cleaner fan
  7. 7. Estimates by HSE 2006A. 2,240,000 UK businesses
  8. 8. Estimates by HSE 2006 A. 2,240,000 UK businessesB. Number withrespiratory risk, needingLEV = 450,000 (20% oftotal UK businesses (A))
  9. 9. Estimates by HSE 2006 A. 2,240,000 UK businessesB. Number withrespiratory risk, needingLEV = 450,000 (20% oftotal UK businesses (A))C. Number with LEV =260,000-330,000 (60-73%of B)
  10. 10. Estimates by HSE 2006 A. 2,240,000 UK businessesB. Number withrespiratory risk, needingLEV = 450,000 (20% oftotal UK businesses (A)) How many of these are designedC. Number with LEV =260,000-330,000 (60-73% properly?of B)
  11. 11. Estimates by HSE 2006 A. 2,240,000 UK businessesB. Number withrespiratory risk, needingLEV = 450,000 (20% oftotal UK businesses (A)) And how many are maintainedC. Number with LEV =260,000-330,000 (60-73% properly ?of B)
  12. 12. Estimates by HSE 2006 A. 2,240,000 UK businessesB. Number withrespiratory risk, needingLEV = 450,000 (20% oftotal UK businesses (A))C. Number with LEV =260,000-330,000 (60-73%of B) D. Number with tested LEV systems = 110,000-130,000 (32-49% of C.)
  13. 13. Estimates by HSE 2006 A. 2,240,000 UK businessesB. Number withrespiratory risk, needingLEV = 450,000 (20% oftotal UK businesses (A)) How many of theseC. Number with LEV = tests are adequate?260,000-330,000 (60-73%of B) D. Number with tested LEV systems = 110,000-130,000 (32-49% of C.)
  14. 14. Common problemswith LEV systems
  15. 15. Inappropriatedesign
  16. 16. Installationof inappropriate“off the shelf”systems
  17. 17. Poordesign
  18. 18. Unrealisticexpectations
  19. 19. Inadequatemaintenance
  20. 20. Inadequatetesting
  21. 21.  Many systems are badly designed Unrealistic expectations of capabilities of LEV Poor standard of maintenance and testing
  22. 22. http://www.hse.gov.uk/pubns/books/hsg258.htm
  23. 23. Awareness Specification Design Installation Use
  24. 24. Awareness Specification Design Installation Use
  25. 25. Awareness • Recognise risk exists Specification Design Installation Use
  26. 26. ExampleWelders exposed to fumeare at risk of contractingpneumonia, asthma,bronchitis, emphysema andcancer
  27. 27. Awareness • Recognise risk exists • Evaluate exposure Specification • Identify sources Design Installation Use
  28. 28. Understand the risk and whatsources contribute to it
  29. 29. Identify all significantsources of exposure
  30. 30. Here, dustcreatedduringemptying ofpowderfrom sackshas beencontrolledby installingan LEVsystem
  31. 31. But they’veforgottenabout thedustgeneratedduring thedisposal ofthe sacks
  32. 32. Sack emptyingwith LEV Sack disposal no LEV LEV for both operations
  33. 33. Awareness • Recognise risk exists • Evaluate exposure Specification • Identify sources Design • Consider process change Installation Use
  34. 34. Is there a better wayof doing the job thatwill reduce exposure?
  35. 35. Awareness • Recognise risk exists • Evaluate exposure Specification • Identify sources Design • Consider process change Installation • Prepare specification Use
  36. 36. The employer needs to provide prospectivesuppliers with the information they need todesign and build an effective LEV system
  37. 37. Awareness • Recognise risk exists • Evaluate exposure Specification • Identify sources Design • Consider process change Installation • Prepare specification Use
  38. 38. Awareness Specification Design Installation Use
  39. 39. All engineeringcontrols,including LEV,need to beproperlydesigned
  40. 40. Awareness • Select potential suppliers Specification Design Installation Use
  41. 41. Awareness • Select potential suppliers Specification • Suppliers prepare designs a and quotations Design Installation Use
  42. 42. Awareness • Select potential suppliers Specification • Suppliers prepare designs a and quotations Design • Supplier selected Installation Use
  43. 43. The employer and the supplier need to worktogether to develop successful control solutions
  44. 44. Awareness • Select potential suppliers Specification • Suppliers prepare designs a and quotations Design • Supplier selected Installation • Prototype? Use
  45. 45. Awareness Specification Design Installation Use
  46. 46. Awareness • Installation of system Specification Design Installation Use
  47. 47. Installation Install according to specification Initial check that the system is operating correctly
  48. 48. Installation Needs to be done in a safe manner
  49. 49. Awareness • Installation of system • Commissioning Specification Design Installation Use
  50. 50. Commissioning1. Ensure the system meets the design specification
  51. 51. Commissioning2. Ensure the system achieves adequate control
  52. 52. Commissioning3. Obtain baseline data for routine testing
  53. 53. Awareness • Installation of system • Commissioning Specification • Handover Design Installation Use
  54. 54. The supplier should provide aUser Manual and Log Book
  55. 55. Awareness Specification Design Installation Use
  56. 56. Awareness • Train users Specification Design Installation Use
  57. 57. Awareness • Train users • Supervision Specification Design Installation Use
  58. 58. It’s the employer’s duty to ensure thatthe system is properly used
  59. 59. Employees should use the systemproperly and report any defects
  60. 60. Awareness • Train users • Supervision Specification • Maintenance and testing Design Installation Use
  61. 61. Maintenance and Testing Routine checks and tests Planned maintenance Through examination and test (TExT)
  62. 62. Awareness • Train users • Supervision Specification • Maintenance and testing Design • TExT Installation Use
  63. 63. HSE Guidance for TExT Visual examination Measure and evaluate technical performance Assessment of control
  64. 64. Awareness Specification Design Installation Use
  65. 65. Can be downloaded from http://www.hse.gov.uk/lev/guidance.htm
  66. 66. CreditsThis presentation contains public sectorinformation licensed under the OpenGovernment Licence v1.0
  67. 67. http://www.slideshare.net/mikeslatermike@diamondenv.co.ukhttp://diamondenv.wordpress.comTwitter: @diamondenvMike Slater
  68. 68. Mike Slater, Diamond Environmental Ltd. (mike@diamondenv.co.uk) This presentation is distributed under the Creative Commons Attribution-NonCommercial-ShareAlike UK:International Licence

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