Confined spaces pose significant dangers due to the fact that an enclosed or partially enclosed space is typically not designed as a workplace that is of an appropriate atmospheric pressure and where there is also danger of engulfment. In accordance with regulation 3.85 of the Occupational Safety and Health Regulations 1996, any work carried out in confined spaces must comply with Safety Standards.

When work needs to be carried out in confined spaces, the correct confined space equipment is important to facilitate the work, minimise the risk of serious injury and provide means of rescue.