GB/T 44548-2024Method for the safety risk assessment of urban thermal pipelines (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part

1.Structure and drafting rules for standardization documents" Drafting is required. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the Ministry of Housing and Urban-Rural Development of the People's Republic of China. This document is under the jurisdiction of the National Technical Committee for Standardization of Urban Heating (SAC/TC 455). This document was drafted by: Beijing Thermal Power Group Co., Ltd., Tangshan Thermal Power Group Co., Ltd., Beijing Jinguangyan Special Equipment Inspection and Testing Co., Ltd., China Urban Heating Association, Harbin Institute of Technology, Taiyuan Heating Group Co., Ltd., Zhengzhou Heating Group Group Co., Ltd., Chengde Thermal Power Group Co., Ltd., Tianjin Energy Investment Group Co., Ltd., Mudanjiang Thermal Power Co., Ltd., Taiyuan City Thermal Design Co., Ltd., Beijing Jingneng Thermal Co., Ltd., Beijing Thermal Engineering Design Co., Ltd., Tangshan Thermal Engineering Design Co., Ltd., Beijing Thermal Equipment Manufacturing Co., Ltd., CSSC Shuangrui (Luoyang) Special Equipment Co., Ltd., Dun'an (Tianjin) Energy Saving Systems Co., Ltd., Shenyang Slurry Transportation Equipment Manufacturing Co., Ltd., China Special Equipment Testing and Research Institute, Beijing Beston Pipeline Technology Co., Ltd. Technology Co., Ltd., Taizhou Longjiang Chemical Machinery Technology Co., Ltd., Hebei Haotian Thermal Power Development Co., Ltd., Langfang Jielante Intelligent Technology Co., Ltd. Company, North China Institute of Science and Technology. The main drafters of this document are. Liu Rong, Chang Zengjun, Cong Guangpei, Guo Hua, Zhang Ruijuan, Zhang Lishen, Li Zhongbo, Wang Peng, Liang Li, Dong Leyi, Pei Lianjun, Chen Jiandong, Chen Fei, Pang Yincheng, Liu Huanzhi, Wang Zhixu, Zhang Yucheng, Du Hongbo, Zhou Dong, Wang Linwen, Lu Duhui, Zou Renyi, Luo Jian, Li Xiaolin, Wang Yi, Jia Lihua, Han Peng, Zhang Yongkang, Zhang Daowei, Yu Hai, Zhou Kangbing, Xiong Conggui, Zhang Guizhen, Wang Zhiqiang, Wei Hongyu, Lin Jianfeng, Guo Shujuan, Hao Xinyi, Pi Xiaosuo, and Yang Bo. Safety risk assessment method for urban thermal pipelines

1 Scope

GB/T 44548-2024 is the Chinese method for assessing the safety risk of urban district heating pipelines. Chinese cities are heated through thousands of kilometres of buried steam and hot water mains, much of it laid in the eighties and nineties, and a failure is not a leak but an explosion of superheated water through a road surface. The standard gives the framework for deciding which sections are dangerous and in what order they should be dealt with: the identification of the hazards and of the failure modes, corrosion, fatigue, ground movement, third-party damage and design and construction defects, the collection and evaluation of the data on the pipeline's condition and history, the assessment of the likelihood of failure and of the consequences, including the population and the traffic above the line, the risk matrix and the acceptance criteria, the classification of the sections by risk level, and the risk control and mitigation measures that follow. For a heating utility, a municipal authority or an engineering consultancy in China, this is the assessment method.

This document describes the general provisions, assessment methods and processes, data collection, failure probability assessment, and safety risk assessment of urban thermal pipelines. Assessment, failure consequence severity assessment, safety risk level and classification management, and preparation of safety risk assessment reports. This document is applicable to the safety risk assessment of thermal pipelines from the heat source outlet to the heat user's heat inlet, excluding thermal stations and relay pumps. Pipelines inside station buildings such as stations and pressure isolation stations.

2 Normative references

This document has no normative references.

3 Terms, definitions and symbols

3.1 Terms and Definitions The following terms and definitions apply to this document.

3.1.1 Thermal pipeline Pipes and pipe accessories that transport and distribute heating media from heat sources to heat users.

3.1.2 Thermal fittings and accessories A general term for pipe fittings, valves, compensators, supports (frames) and appliances on thermal pipelines.

3.1.3 safety risk assessment To achieve system safety, apply the principles and methods of safety system engineering to analyze the dangerous and harmful factors in the system. Identify and analyze, predict the possibility and severity of accidents and occupational hazards in the system, determine the safety risk level and classify it The activity of making evaluation conclusions.

3.1.4 failure Thermal pipes lose their specified functions.

3.1.5 failure likelyhood The probability of failure occurring.

3.1.6 failure consequence severity The severity of the consequences caused by failure, such as personal injury, environmental damage, economic loss and social impact.

3.1.7 analytic hierarchy process Decompose the elements related to decision-making into levels such as goals, criteria, and plans, and conduct qualitative and quantitative analysis on this basis.