GB/T 42841-2023 Ergonomics of the thermal environment—Assessment and management of human cold and heat stress

Scope

This document:
—— Describes a strategy for assessing and interpreting physiological limitations or risks of discomfort when people work in a given climate environment;
—— Proposes strategies and practical tools for assessing and managing cold risks in the workplace;
—— Presents conditions and methods for evaluating heat loss based on physiological parameters such as core body temperature, skin temperature, heart rate, and weight loss;
—— Specifies methods for analyzing, evaluating, and interpreting the heat stress experienced by humans in thermal environments, and for predicting sweat rates and core temperatures under working conditions;
—— Specifies methods and strategies for evaluating cold stress when humans are exposed to cold environments;
—— Provides recommendations for the safety of humans exposed to extreme thermal environments, helping those responsible for such risks to determine the level of medical supervision in different situations;
—— Specifies methods for estimating the heat transfer characteristics (dry heat loss and evaporative heat loss resistance) of clothing and suits based on the thermal resistance values of known garments, suits, and textiles under steady-state conditions; and studies the effects of physical movement and air infiltration on thermal resistance and water vapor resistance.
This document is applicable to:
—— Evaluating heat stress under any working temperature;
—— Risk assessment in indoor and outdoor cold environments, but not applicable to diving situations or other types of work conducted underwater;
—— Evaluating heat injuries based on physiological indicators in working conditions in the fields of ergonomics and industrial hygiene;
—— Evaluating cold stress under conditions of continuous exposure, intermittent exposure, and occasional exposure in indoor and outdoor work environments, not applicable to specific impacts related to certain meteorological con

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