GB/T 42841-2023 English PDF
Basic dataStandard ID: GB/T 42841-2023 (GB/T42841-2023)Description (Translated English): Ergonomics of the thermal environment - Assessment and management of human cold and heat stress Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: A25 Classification of International Standard: 13.180 Word Count Estimation: 206,272 Date of Issue: 2023-08-06 Date of Implementation: 2023-08-06 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 42841-2023: Ergonomics of the thermal environment - Assessment and management of human cold and heat stress---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. ICS 13.180 CCSA25 National Standards of People's Republic of China Ergonomics of Thermal Environments Assessment and management of hot and cold stress in humans Published on 2023-08-06 Implemented on 2023-08-06 State Administration for Market Regulation Released by the National Standardization Administration Committee Table of contentsPreface V 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 2 4 symbols 6 5 Risk assessment strategies to prevent heat stress or discomfort in the work environment8 5.1 General 8 5.2 The concept of evaluation strategy 9 5.3 Phase 1.Observational Assessment9 5.4 Phase 2.Analytical Assessment 12 5.5 Phase 3.Expertise-Based Assessment14 6 Cold workplaces – risk assessment and management15 6.1 General 15 6.2 Assessment and Management Strategies15 6.3 Cold risk assessment and management practices17 7 Thermal damage assessment based on physiological index measurements19 7.1 General 19 7.2 Core temperature measurement (tcr) 20 7.3 Skin temperature measurement (tsk) 22 7.4 Thermal damage assessment based on heart rate (HR) 23 7.5 Physiological strain assessment of body mass loss (Δmsw) due to sweating 23 8 Determining and explaining heat stress through computational analysis for predicting heat damage24 8.1 General 24 8.2 Principles of evaluation methods 24 8.3 Main calculation steps 25 8.4 Required Sweat Rate Explanation 26 9 Determine and explain cold stress using essential clothing thermal resistance (IREQ) and local cold effects 27 9.1 General 27 9.2 Principles of evaluation methods 27 9.3 Whole body cooling 28 9.4 Local cooling 31 9.5 Practical evaluation and explanation of cold environment 32 10 Medical supervision of individuals exposed to extreme heat or cold33 10.1 General 33 10.2 Overview 33 10.3 Ergonomic investigation 34 10.4 Occupational exposure35 11 Estimation of clothing thermal resistance and water vapor resistance 36 11.1 Overview 36 11.2 Use of standards 36 11.3 Estimating the thermal resistance of clothing based on the thermal resistance table and measurements of the standing warm-up dummy 37 11.4 Estimation of clothing area coefficient 39 11.5 Estimation of thermal resistance of the air layer (boundary layer) on the outer surface of clothing 39 11.6 Estimation of water vapor resistance 40 11.7 Effects of human movement and air flow on clothing thermal resistance and water vapor resistance 41 11.8 Other factors affecting the thermal resistance of clothing 47 Appendix A (informative) Examples of heat or discomfort precautions 49 Appendix B (Informative) Checklist for identifying cold-related problems at work51 Appendix C (informative) Analysis of issues related to cold 55 Appendix D (Informative) Cold Environment Operation Planning and Management Guide 59 Appendix E (informative) Cold environment working health questionnaire 63 Appendix F (Informative) Assessment and Management of Cold Environment Operations in Indoor Work---Example from Food Processing Industry 67 Appendix G (informative) Comparison of physiological assessment methods of thermal injury 69 Appendix H (Informative) Measurement Technology 72 Appendix I (informative) Limits of physiological parameters of thermal damage77 Appendix J (Normative) Data necessary for calculation of thermal balance 79 Appendix K (informative) Criteria for evaluating acceptable exposure times in high-temperature working environments85 Appendix L (informative) Metabolic rate 87 Appendix M (informative) Heat transfer characteristics of clothing 90 Appendix N (informative) Computer program and solution example for calculating and predicting thermal damage model 92 Appendix O (Normative) Heat Balance Calculation 93 Appendix P (Informative) Physiological Guidelines for Cold Exposure 95 Appendix Q (informative) Metabolic rate and thermal characteristics of clothing 97 Appendix R (informative) IREQ evaluation example 99 Appendix S (informative) Determination of wind chill temperature 101 Appendix T (informative) Determination and interpretation of cold stress application software using required clothing thermal resistance (IERQ) and local cold effects 110 Appendix U (informative) Basic ergonomic principles when volunteers may feel discomfort 111 Appendix V (Informative) Medical Effects of Exposure to Cold and Heat 113 Appendix W (informative) Medical supervision in extreme high temperature environments in laboratories 117 Appendix X (informative) Medical supervision in extreme low temperature environments in laboratories 121 Appendix Y (informative) Practical needs for medical supervision in laboratory environments or environments where volunteers are infrequently exposed125 Appendix Z (informative) Occupational exposure to intense heat and cold 126 Appendix AA (Normative) Thermal resistance value of clothing suit 129 Appendix BB (Normative) Thermal resistance value of a single piece of clothing 144 Appendix CC (Normative) Clothing breathability index value 169 Appendix DD (informative) Body-warming dummy to measure clothing thermal resistance and water vapor resistance 179 Appendix EE (Informative) Human Experiment on Clothing Thermal Resistance and Water Vapor Resistance 184 Appendix FF (informative) Different expressions of clothing thermal resistance 185 Appendix GG (informative) Heat transfer estimation of reflective clothing 187 Appendix HH (informative) Guidelines for determination of covered body surface area 189 Reference 191ForewordThis document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document refers to ISO 15265.2004 "Ergonomics of thermal environments. Risk assessment for the prevention of heat stress or discomfort in work environments" Strategy" (see Chapter 5), ISO 15743.2008 "Ergonomics of thermal environments Risk assessment and management of cold workplaces" (see Chapter 6), ISO 9886.2004 "Ergonomics Thermal Damage Assessment Based on Physiological Index Measurements" (see Chapter 7), ISO 7933.2004 "Ergonomics of Thermal Environments to Determine and Explain Heat Stress through Computational Analysis to Predict Thermal Damage" (see Chapter 8), ISO 11079.2007 "Thermal Environmental ergonomics using essential clothing thermal resistance (IREQ) and local cold effects to determine and explain cold stress" (see Chapter 9), ISO 12894.2001 Ergonomics of thermal environments Medical supervision of individuals exposed to extreme heat or cold (see Chapter 10) and ISO 9920.2009 "Estimation of Thermal Resistance and Water Vapor Resistance of Ergonomic Clothing in Thermal Environments" (see Chapter 11) 7 international standards were drafted, one The degree of consistency is not equivalent. Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed and coordinated by the National Ergonomics Standardization Technical Committee (SAC/TC7). This document was drafted by. Beijing University of Aeronautics and Astronautics, Guangdong Midea HVAC Equipment Co., Ltd., China Institute of Standardization, Nanjing TICA Environmental Jing Technology Co., Ltd., Fujian Yabot Digital Technology Co., Ltd., Winning Energy Efficiency Technology (Beijing) Co., Ltd., SDIC Winning Quality Infrastructure Shi Research Institute Co., Ltd., Qingdao Haier Intelligent Technology R&D Co., Ltd., Guangdong Midea Refrigeration Equipment Co., Ltd., Inner Mongolia University of Technology, An Huiyangzi Air Conditioning Co., Ltd., Ningbo Fangtai Kitchenware Co., Ltd., Shanghai Mitsubishi Electric·Shangling Air Conditioning and Electrical Appliance Co., Ltd., Guangzhou Lian Dongwuwu Technology Co., Ltd., Aopu Home Furnishing Co., Ltd., Beijing Guanghui Derun Aviation Technology Co., Ltd., Wuhu Meizhi Air Conditioning Equipment Co., Ltd. Co., Ltd., Chongqing University. The main drafters of this document. Qiu Yifen, Yue Bao, Zhao Chaoyi, Wang Rui, Qi Yun, Yang Yahua, Su Shiqiao, Wang Binhou, Zhang Hao, Zhang Yiwen, Wei Bo, Feng Chaoqing, Zeng Xiaocheng, Guo Junjie, Zhou Xingfa, Chen Yaliang, Zhang Xinyu, Ding Yunxiao, Yang Bing, Li Wei, Gao Jianfeng, Zhang Jiazheng, Cheng Yong, Du Shunkai, Mei Zhiguang, Ge Meng, Zhang Wentao, Zhang Di, Liang Tao, Tian Jun, Ma Yuexin, Shao Yanpo, Huang Guojun, Yu Cailing, Gao Ping, Lin Kai, Wang Jingjing, Zheng Chunyuan, Li Hongwei, Li Shaochun. Ergonomics of Thermal Environments Assessment and management of hot and cold stress in humans1 ScopeThis document. ---Describes a strategy for assessing and explaining risks of physiological limitations or discomfort when a person works in a given climate environment; ---Proposes strategies and practical tools for assessing and managing cold risks in the workplace; ---Proposed the conditions and conditions for evaluating heat loss based on the measurement of physiological parameters such as human body core temperature, skin temperature, heart rate and weight loss. method; ---Specifies methods for analyzing, evaluating and explaining the heat stress experienced by the human body in a thermal environment, and predicting the sweat rate of the human body under working conditions and core temperature; ---Specifies the evaluation methods and strategies for cold stress when the human body is exposed to cold environments; ---Provides recommendations for the safety of humans exposed to extreme thermal environments, helping those responsible for such risks to cope with different situations. determine the level of medical supervision under the circumstances; ---Specifies the estimation of heat transfer characteristics of clothing suits (dry) under steady-state conditions based on known clothing thermal resistance values of clothing, suits and textiles Heat loss and evaporation heat loss resistance) method; the effects of body movement and air penetration on thermal resistance and water vapor resistance were studied. This document applies to. ---Heat stress evaluation at any operating temperature; ---Risk assessment for indoor and outdoor cold places, but not applicable to diving situations or other types of work performed underwater; ---Thermal damage evaluation based on physiological indicators for working conditions in the fields of ergonomics, industrial hygiene and other fields; ---Evaluation of low temperature stress under conditions of continuous exposure, intermittent exposure, and occasional exposure in indoor and outdoor working environments, not applicable Specific impacts related to certain meteorological conditions (e.g. precipitation, including rain, snow, ice) that are evaluated using other methods; ---Medical supervision in experimental settings and in occupations requiring exposure to extreme heat environments, addressing the expectations of the population under both conditions An assessment should be made for heat stress, but the arrangements for medical supervision will be slightly different for different situations; ---Evaluate the impact of human movement and clothing breathability on thermal resistance and breathability resistance.2 Normative reference documentsThe contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 18048-2008 Determination of ergonomic metabolic rate in thermal environments GB/T 40233-2021 Ergonomic physical quantity measuring instruments for thermal environments GB/T 40288-2021 Ergonomic terms and symbols for thermal environments fabricstoair) ISO 13732-3.2005 Ergonomics of thermal environments. Methods for evaluation of reactions to surfaces in contact with the human body. Part 3.Cold surfaces (Er- withsurfaces-Part 3.Coldsurfaces) ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 42841-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 42841-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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