Guidance Note 11, The Management of Risk when Using Gases in Enclosed Workplaces, Revision 4
Year: 2018 Language: english Author: BCGA Genre: Guide Format: PDF Quality: eBook Pages count: 48 Description: The key to successful safety management is the assessment and management of risk. The Management of Health & Safety at Work Regulations (4) require all employers to assess risk and try to anticipate what can go wrong, then to implement control measures to reduce the risk. As such, safety management focuses on prevention. This document provides guidance that can be used in the assessment of risk associated with gases in enclosed workplaces, to identify where hazardous atmospheres may occur and the appropriate control measures. Ambient air is primarily composed of two gases; nitrogen at approximately 78 % and oxygen at 20.9 %. Changes to the air composition can result in a potentially hazardous atmosphere. Human senses cannot detect different compositions in the atmosphere and are not a valid indicator. Changes to the composition of the air will occur from the release of gas(es) into the local environment. Examples include evaporation, leakage and process exhaust. There is also the potential for gases to enter the workplace from external sources. Examples include the release of gases from neighbour sites, or concentrations of naturally occurring gases. The changes will be more pronounced in an enclosed space and where there is inadequate ventilation. It should also be borne in mind that even before the introduction of stored gases into certain workplace situations, gases and low oxygen concentrations may have been generated within an enclosed space by natural decay mechanisms such as the production of hydrogen sulphide from stagnant water, or the corrosion (oxidation) of some metals which can deplete the available oxygen. Atmospheric checking prior to entry to an enclosed space is therefore vital. Incidents can occur unexpectedly, and may be serious, and sometimes fatal. All personnel accessing an enclosed workplace should be aware of the hazard(s) associated with non-respirable atmospheres
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Guidance Note 11, The Management of Risk when Using Gases in Enclosed Workplaces, Revision 4
Language: english
Author: BCGA
Genre: Guide
Format: PDF
Quality: eBook
Pages count: 48
Description: The key to successful safety management is the assessment and management of risk. The Management of Health & Safety at Work Regulations (4) require all employers to assess risk and try to anticipate what can go wrong, then to implement control measures to reduce the risk. As such, safety management focuses on prevention.
This document provides guidance that can be used in the assessment of risk associated with gases in enclosed workplaces, to identify where hazardous atmospheres may occur and the appropriate control measures.
Ambient air is primarily composed of two gases; nitrogen at approximately 78 % and oxygen at 20.9 %. Changes to the air composition can result in a potentially hazardous atmosphere. Human senses cannot detect different compositions in the atmosphere and are not a valid indicator.
Changes to the composition of the air will occur from the release of gas(es) into the local environment. Examples include evaporation, leakage and process exhaust. There is also the potential for gases to enter the workplace from external sources. Examples include the release of gases from neighbour sites, or concentrations of naturally occurring gases. The changes will be more pronounced in an enclosed space and where there is inadequate ventilation.
It should also be borne in mind that even before the introduction of stored gases into certain workplace situations, gases and low oxygen concentrations may have been generated within an enclosed space by natural decay mechanisms such as the production of hydrogen sulphide from stagnant water, or the corrosion (oxidation) of some metals which can deplete the available oxygen. Atmospheric checking prior to entry to an enclosed space is therefore vital.
Incidents can occur unexpectedly, and may be serious, and sometimes fatal. All personnel accessing an enclosed workplace should be aware of the hazard(s) associated with non-respirable atmospheres
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BCGA GN 11 - Revision 4 - For Publication.pdf
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