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NFPA 326

2015 Edition, 2015

Complete Document

Standard for the Safeguarding of Tanks and Containers for Entry, Cleaning, or Repair



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EFFECTIVE DATE: 12/01/2014 *
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Description / Abstract:

This standard shall apply to the safeguarding of tanks or containers operating at nominal atmospheric pressure that contain or have contained flammable or combustible liquids or other hazardous substances and related vapors or residues.

This standard shall not apply to tank vehicles or tank cars; tanks, bunkers, or compartments on ships or barges or in a shipyard; gas plant equipment or gas distribution systems for natural or manufactured gas; or compressed or liquefied gas cylinders. 

This standard shall not apply to hot tapping. 

This standard shall not apply to the entry of a tank or container that contains an inert atmosphere. 

Purpose

The purpose of this standard shall be to provide minimum procedures for the following:

(1) The safe opening, entry, and cleaning of a tank or container that contains or has contained flammable, combustible, or other hazardous substance vapors, liquids, or solid residues

(2) The safe removal of flammable, combustible, or other hazardous substance vapors, liquids, or solid residues from tanks or containers and the safeguarding of these vessels for entry, cleaning, or repair

The purpose of this standard shall also be to provide minimum procedures that permit repair, hot work, or other operations that have the potential to create a fire, an explosion, or another hazard.