Canadian Standards Association Occupational Health & Safety Program
Primary Objective “Prevention of Harm to Workers”
New CSA Machinery Safeguarding Standards • Z107.58 Machinery Noise Emissions • Z142-02 Power Presses • Z434-03 Industrial Robots • Z432-04 Safeguarding of Machinery • Z460-05 Hazardous Energy Control -Lockout and Other Methods Z460-05 Control of Hazardous Energy - Lockout
Risk Assessment /Reduction Determine the limits of the machine Identify the hazards Estimate the Risk Risk Controls Evaluate the Risk Reduce the Risk
Control of Hazardous Energy • LOCKOUTfor all maintenance/repair work activities or ‘operational’ tasks if a worker : 1) removes or bypasses a guard or other safety device 2) requires to place any part of his or her body into an area on a machine or equipment where work is actually performed… • Release of Stored Hazardous Energy moving parts – gravitational energy (electrical, mechanical, hydraulic, pneumatic, nuclear, thermal, others..) • Alternative Methods to Lockout, operational tasks for minor service…or service and/or maintenance tasks carried out with ‘power on’. ……subject to risk assessment.
Lockout Procedure • Notification • Shutdown • Isolate energy sources • Relieve/restrain stored energy • Lockout energy-isolating devices • Verification and clearance of personnel • Perform work • Inspect/check area • Remove locks/re-energize • Restart
Normal Production Operation • Minor tool changes and adjustments, and other minor servicing activities, which take place during normal production operations, are not covered if the are routine, repetitive, and integral to the use of the equipment for production, provided that the work is performed using alternative measures which provide effective protection.
Major deficiencies of OSHA 1910.147 • Allowing Tags in place of Locks • Lack of specific requirements for ‘alternative measures’, operational tasks which are part of normal production and those tasks requiring equipment to be partially energized. • Does not address design requirements for effective hazardous energy control for new machines/equipment, other than asking for “capable of being locked out”
Major deficiencies of ANSI Z244 • Allowing Tags in place of Locks • Alternative methods…….. control reliability, harmonization with other ANSI standards and ISO standards.
ISO 14118 Safety of Machinery – Prevention of unexpected start-up • For new machinery only, operational requirements not included. ISO standards do typically not cover operational, work place dependent requirements. Those requirements are covered by jurisdictional occupational Health and Safety Regulations.
Characteristics of operational tasks…routine, repetitive….. • Short of duration • Relatively minor in nature • Occur frequently during the shift, day.. • Performed by operators … • Do not involve extensive disassembly • Represent predetermined cyclical activities • Expected to occur regularly • Minimally interrupt the production process • Exists even when optimal operating levels are achieved • Require task specific personnel training
Subjects Covered by Z460 • Traditional Lock-out including group lock-out for maintenance and/or service of equipment • Release of stored energy, a more systematic approach. • Alternative methods to lock-out for partially energized equipment and operational tasks part of normal production where lock-out not possible/feasible. (Risk assessment ‘control reliability’; Review of existing “C” Standards that adopt alternative methods to lock-out).
Adopting Safety Standards (International Standards) B1 & B2 Standards "B1" Standards Safety of Particular Aspects "B1" Standards Safety Related Devices Safety Distance Noise, Surface Temperature etc. • Light Curtain • Safety Mat • Moveable • Guard, etc "C" Standards Safety of Particular Machines • Presses • Injection Moulding M/C's • Robots
Examples of “Other Methods” • Printing Industry Inch/Safe/Service Procedures ANSI B 65.1-1995 • Plastic Industry ANSI/SPI 151.15-2000 ANSI/SPI 151.21-2000 • Robotics Applications ANSI/RIA R15.06-1999
Risk Assessment and Hazard Abatement Establishment risk classification based on: - Frequency - Severity RISK related to the considered hazard and SEVERITY of the possible harm for the considered hazard is a function of PROBABILITY OF OCCURRENCE of that harm - frequency and duration of exposure - probability of occurrence of hazardous event - possibility to avoid or limit the harm
Risk Assessment and Hazard Abatement Matrix References S - Severity of injury S1 - Slight injury - first aid only S2 - Serious injury - greater than first aid only E -Exposure frequency E1 - Low - less than or equal to once per day E2 - Medium - greater than once per day or equal to once per hour E3 - High - greater than once per hour P - Possibility of avoiding a hazard P1 - Possibility under specific conditions P2 - Scarcely possible
Risk Assessment and Hazard Matrix Starting point for risk estimation for the safety related part of the control system. B 1 2 3 4 S1 P1 E1 P2 S2 E2 P1 E3 P2 Preferred categories Possible categories which require additional measures Over-dimensioned measures for the relevant risk Increasing reliability of components Increasing redundancy and/or monitoring
Risk before pro- tective measures are applied. Tolerable risk Residual risk MINIMUM RISK REDUCTION FROM ALL PROTECTIVE MEASURES Increase in risk due to failure of Safety Related Parts SRP of Control Systems control reliability (integrity) INSIGNIFICANT MODERATE HIGH LOW EXTREME RISK Concept of risk reduction using protective measures including safety functions.
OHS Standards Program 2007 New and Proposed Standards and Guidelines
Standards Under Development • B167 Overhead Travelling Cranes • Z11 Portable Ladders • Z96.1 Selection, Use, and Care of High-Visibility Apparel • Z195 Industrial Protective Footwear • Z259 Selection, Use, and Care of Fall Protection Equipment • Z797 Code of Practice for Access Scaffolds • Z1004 Workplace Ergonomics • Z1006 Confined Space Entry
Standards Under Development • Z462 Electrical Safety in the Workplace - based on NFPA 70E • Z1002 Injury Risk Assessment and Management • Z1610 PPE for Emergency First Responders
DevelopingNational OHS Standards CSA invitesYOUto get involved! www.csa.ca