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Hot Work <br />Potential Significant Hazards <br />Inadequate surveillance of Job site conditions <br />(for example, not monitoring for combustible <br />gas) may put personnel at risk. <br />Flammable gases can be present or <br />build up during the work and create an <br />explosive atmosphere. <br />Flammable and combustible materials n the <br />worK area can ignite from transfer of heat, <br />sparks or slag. <br />Uncontrolled entry into a restricted work <br />site Dy motor vehicles or other engine- <br />driven equipment (such as generators and <br />welding machines) can ignite a fire or cause <br />an explosion. <br />Explosive pockets of gas can build up while <br />performing underwater cutting or welding. <br />Compressed gas cylinders may explode if <br />hoses catch fire or may become missiles if <br />pressure is suddenly released. <br />Prevention Means Always: <br />Ask: Is there a safer way to complete the job with <br />cold work? <br />Comply with permitting requirements. Use of this <br />field guide is not an equivalent. <br />Provide supervisory job-site walk-through prior <br />to permit approval and periodically during work. <br />Complete and verify the isolation checklist and <br />follow approved isolation procedures before <br />starting work. <br />ID Make sure flammables can't be introduced during <br />hot-work operations. Seal drain openings, tank <br />vents and pressure safety valve (PSV) discharges. <br />Clear hot-work area of combustibles <br />and flammables. <br />Cut vents in underwater equipment where <br />necessary to allow flammable gases to escape. <br />Adhere to all gas testing requirements. Test <br />properly to be sure there ore no pockets of <br />flammable vapors. <br />Have a dedicated fire watch onsite during the <br />work and for at least 30 minutes after hot work. <br />Inspect all equipment, and follow safe handling <br />procedures for compressed gas cylinders <br />and hoses. <br />Secure and barricade the work site to prevent <br />unauthorized access of vehicles and personnel. <br />Enforce permits for motorized vehicles operating <br />in classified hazardous areas. <br />•• • • <br /> <br />15 Assess all of your job's specific hazards *** Did you assess for human performance? 16 •