Confined space

A tank or space that meets all three of the following requirements:

  • is large enough and so configured that a responder can bodily enter and perform assigned work;
  • has limited or restricted means for entry or exit (e.g. tanks and vessels, storage bins, hoppers, vaults, and pits); and
  • is not designed for or meant to be continuously occupied by personnel.

Source: API RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global Standards


Confined space

A space that:

  1. is large enough and so configured that an employee can bodily enter and perform assigned work;
  2. has limited or restricted means for entry or exit (e.g. tanks, vessels, reactors, silos, storage bins, hoppers, vaults, and pits are spaces that may have limited means of entry); and
  3. is not designed for continuous employee occupancy.

Source: API Standards 2217A, Guidelines for Safe Work in Inert Confined Spaces in the Petroleum and Petrochemical Industries, Fourth Edition, July 2009. Global Standards


Confined space

An enclosure with known or potential hazards and restricted means of entrance and exit, which is not normally occupied by people, and is usually not well ventilated. Examples of confined spaces in the petroleum industry include: process vessels, vessel tower skirts, flare stacks, boilers, storage tanks, tank cars and trucks, vaults, large-diameter piping, and under certain circumstances, spaces located below ground level, such as pits (OSHA 1910.146).

API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards

API RP 2009, Safe Welding, Cutting, and Hot Work Practices in the Petroleum and Petrochemical Industries, Seventh Edition, February 2002 (Reaffirmed, March 2012), Global Standards

Confined space

In this Part, “confined space” means a storage tank, process vessel, ballast tank or other enclosure not designed or intended for human occupancy, except for the purpose of performing work

  1. that has poor ventilation,
  2. in which there may be an oxygen atmosphere, or
  3. in which there may be an airborne hazardous substance.

Source:  Nova Scotia Offshore Petroleum Occupational Health & Safety Requirements, Canada-Nova Scotia Offshore Petroleum Board, Canada, December 2000. Regulations

Source: Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, Canada, current to April 29, 2013. Regulations

Confined space

Confined space means an enclosed, or partially enclosed, space that:

  1. is not used or intended for use as a regular workplace; and
  2. has restricted means of entry and exit; and
  3. has, or may have, inadequate ventilation, contaminated atmosphere or oxygen deficiency; and
  4. is at atmospheric pressure when occupied.

Source: Offshore Petroleum and Greenhouse Gas Storage (Safety) Regulations 2009 (Select Legislative Instrument 2009 No. 382 as amended), Australia, prepared on 1 January 2012. Regulations


Confined space

As defined in General Industry Safety Orders, Section 5156.

Source: Petroleum Safety Orders–Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. Regulations

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