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Welding Fume Exposure in a Mechanic’s Shop on UC Santa Cruz Campus

机译:加州大学圣克鲁斯分校机械工车间的焊接烟尘暴露

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摘要

This study was triggered from worker complaints about metal fume odors during metal welding in a mechanic garage. Hard-face welding, which includes use of an electrode to join metal pieces together, occurs once per year in this occupational setting and was chosen for this study because of the large amount of smoke that is produced, giving the study a worst-case scenario element. Sampling occurred over a period of one hour, which is the same amount of time hard-face welding is conducted when applicable. Results show that a worker performing hard-face welding was not exposed to metal fume concentrations above any 8-hour OEL-TWA established by OSHA, NIOSH or ACGIH. Readings from area samples suggest that welding smoke tends to escape the fume hood, and thus expose neighboring employees, but below any exposure limit. No action levels were breached, therefore the current welding practices do not require changing, but could use optimization. Recommendations include providing training to the welder to modify work practices by moving his face away from the smoke plume during welding, if and when possible. An engineering control recommendation includes installing a fume hood curtain to help contain smoke that strays outside of the fume hood.
机译:这项研究是由工人抱怨在机械车库进行金属焊接时产生的金属烟味引起的。在这种职业环境下,每年进行一次硬面焊接,其中包括使用电极将金属件连接在一起,并且由于产生大量烟雾而被选择用于本研究,这使该研究成为最坏情况元件。采样时间为一小时,与适用时进行的硬面焊接时间相同。结果表明,进行硬面焊接的工人不会受到超过OSHA,NIOSH或ACGIH确定的任何8小时OEL-TWA浓度的金属烟气。从区域样本中读取的数据表明,焊接烟雾倾向于从通风橱中逸出,从而使附近的雇员暴露在外,但低于任何暴露极限。没有违反任何操作级别,因此当前的焊接实践不需要更改,但可以使用优化。建议包括为焊工提供培训,以在可能的情况下通过在焊接过程中将其脸部移开远离烟羽的方式来改变工作习惯。工程控制建议包括安装通风柜窗帘,以帮助遏制从通风柜外部散发出来的烟雾。

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    Mahini Neema;

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  • 年度 2015
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