Safe confined space entry and work

Published:  13 September, 2013

NFPA 350 draft is now open for your input.

The Guide primarily focuses on addressing gaps in standards and on providing prescriptive guidance on how to implement requirements in existing standards, particularly those found in 1910.146.

While the OSHA 1910.146 standard simply requires verification of a safe atmosphere prior to entry, the NFPA Guide provides prescriptive guidance on exactly how to do such testing and includes information about gas monitor selection (see a selection of manufacturers here), calibration and limitations and tells you how to select and locate ventilation equipment to eliminate and control atmospheric hazards.

The Guide incorporates information on requirements not specifically addressed in existing standards such as adjacent space hazards and competencies for personnel involved in confined space entry. It also addresses best practices not typically found in regulations and standards such as management of change and prevention through design.

The NFPA is encouraging the public to read the full documents and submit input by January 3, 2014.

To view the document and submit input go to

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