ISO 23875 is a new international standard for a consistent approach to designing, testing, operating, and maintaining the air-quality systems of operator enclosures.
Adoption of the requirements and test methods outlined in the standard, protect personnel inside operator enclosures.
Listen to an exclusive overview of ISO 23875, presented by ISO Working Group Lead, Jeff Moredock, to learn about the standard’s five key performance requirements, including:
- Increased filter efficiency requirements: A filter that meets more stringent evaluation criteria, typically an ISO 15 E or higher efficiency, ISO 35 H HEPA filter, is required in ISO 23875-compliant cabins in mining.
- Maximum allowable CO2 level: Ambient CO2 plus 400 parts per million
- Fresh air and recirculation system requirements: Maximum respirable particulate matter concentration of less than 25 micrograms per cubic meter of air at start/end of decay test, with a maximum of 120 seconds delay time.
- Established cabin pressurisation levels: Operator enclosures must maintain minimum pressurisation of greater than or equal to 20 Pa, even when the HVAC is turned off.
- Real-time operator cabin monitoring: Monitor must include an audible alarm for CO2 and pressurisation to alert the operator when levels go beyond the permissible threshold.
Safety in mining operations is of concern to all involved in owning, developing, managing, and working in mining environments.
Routine mining activities can generate airborne particulates that may be hazardous to human health. Therefore, it is necessary to develop controls which limit the operator’s exposure to airborne particulate while operating equipment from within the operator enclosure.
With the rise in the number of countries regulating air quality in mining, construction, and industrial environments; machine manufacturers and mine owners have become increasingly aware of the need for standard practices in the design and performance of operator enclosures.
All operator enclosures, either on new machines or existing machines currently in operation, are expected to provide consistent air quality performance. The technical aspects of an operator enclosure are universal as are the design and performance testing methods and this new standard addresses the needs of fixed and mobile operator enclosures.
The NEW ISO 23875 standard will place a greater emphasis on the air quality inside the cabin than previously addressed. It differs from past standards because it is a lifecycle standard, addressing cabin air-control systems from the time of design, to when equipment arrives on site and throughout its operating life. ISO 23875 outlines specific engineering and ongoing testing to ensure compliance.
This means designers and operators will need to consider aspects of control of airborne contaminants such as dust but also address the effects of CO2 (a product of human respiration) dilution in the cabin environment. This will allow for operator enclosures to perform at a level that provides sustained air quality, reducing concentrations of respirable particulate matter and carbon dioxide (CO2) that are harmful to human health.
The design specifications are universal in their application and do not contemplate specific mining environments.
This Workshop will provide you with the requirements, best practices, and information to achieve sustained quality in the design, manufacture, performance testing, use, and maintenance of the operator enclosure air-quality control system. Control of airborne particulate and dilution of CO2 within the operator enclosure are addressed.
Recommendations are made for operational integration of the air-quality control system.