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A confined space is a space with limited entry and egress and not suitable for human inhabitants. ... the inside of a boiler ... Welding and Cutting (OSHA 1988): 217 ...
Most weld purging is carried out on joints made by the TIG or GTAW arc welding process. [6] When the laser welding process is chosen, joints or welds being made on reactive materials will need to be carried out and in the case of electron beam welding, this is carried out in a vacuum, in which case purging takes place by complete evacuation of all gas.
Examples of high-risk jobs where a written permit-to-work procedure may need to be used include hot work (such as welding), confined space entry, cutting into pipes carrying hazardous substances (breaking containment), diving in the vicinity of intake openings, and work that requires electrical or mechanical isolation.
Confined spaces can pose a hazard not just to workers, but also to people who try to rescue them. In 2015, around 136 U.S. workers died in fatalities related to confined spaces according to the data collected in response to the annual Census of Fatal Occupational Injuries (CFOI) program of the Bureau of Labor Statistics. [16]
This is a list of welding processes, separated into their respective categories. The associated N reference numbers (second column) are specified in ISO 4063 (in the European Union published as EN ISO 4063 ). [ 1 ]
A positive pressure enclosure, also known as a welding habitat or hot work habitat, is a chamber used to provide a safe working environment for performing hot work in the presence of explosive gases or vapors. They are commonly used in welding environments and are associated with the offshore oil industry. [1]
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