H&S Tech Tip: Confined Space Definition
The Standard (AS2865:2009) defines a Confined Space as:
An enclosed or partially enclosed space that is not intended or designed primarily for human occupancy, within which there is a risk of one of more of the following:
a. An oxygen concentration outside the safe oxygen range
b. A concentration of airborne contaminant that may cause impairment, loss of consciousness or asphyxiation
c. A concentration of flammable airborne contaminant that may cause injury from fire or explosion
d. Engulfment in a stored free-flowing solid or a rising level or liquid that may cause suffocation or drowning
Types of Confined Spaces:
Confined spaces can be located above or below ground, and despite the name, they can be very small or very large. Confined spaces can have one single point of entry or egress, or multiple.
- Tank-like Compartments: Such as; tankers, process vessels, boilers, pressure vessels, silos and storage tanks.
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Open Top Spaces: Such as; pipes, pits, degreasers, sewers, shafts and ducts.
- Small Hatchways or Access Pits: Such as; cargo tanks, cellular double bottom tanks, duct keels, ballast and oil tanks and void spaces.
Relevant Courses
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Confined Space and Gas Detection
Prepare yourself with the knowledge and technical skills to effectively plan, observe and safely enter a confined space. Unit standards covered: 17599, 18426 and 25510. Optional unit standards: 3058, 19207 and 18037
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Confined Space and Gas Detection Refresher
Refresh your knowledge and technical skills to effectively plan, observe and safely enter a confined space. Refresh Optional Unit standards: 17599, 18426, 25510, 3058, 19207, and 18037 Students must have units reported previously on their NZQA Record of Achievement to be refreshed on this training course
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Confined Space - Entrant Only
Acquire a comprehensive understanding of the hazards and controls used when working with confined spaces. Unit standard covered: 18426
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Atmospheric Testing and Gas Detection
Prepare yourself with the knowledge and technical skills to determine if a suitable atmosphere exists to conduct work safely. Unit standards covered: 25510 and 3058