GB/T 28638-2023_English: PDF (GB/T28638-2023)
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Heat loss test for thermal insulation structure and evaluation methods for thermal insulation efficiency of district heating pipes
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GB/T 28638-2023
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GB/T 28638-2012 | English | 1159 |
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Heat loss test for thermal insulation structure and evaluation methods for thermal insulation efficiency of district heating pipes
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GB/T 28638-2012
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Standard ID | GB/T 28638-2023 (GB/T28638-2023) | Description (Translated English) | Heat loss test for thermal insulation structure and evaluation methods for thermal insulation efficiency of district heating pipes | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | P46 | Classification of International Standard | 91.140.10 | Word Count Estimation | 34,361 | Date of Issue | 2023-08-06 | Date of Implementation | 2024-03-01 | Older Standard (superseded by this standard) | GB/T 28638-2012 | Drafting Organization | Beijing Public Utilities Research Institute, China Urban Construction Research Institute Co., Ltd., China Municipal Engineering North China Design and Research Institute Co., Ltd., Taizhou Longjiang Chemical Machinery Technology Co., Ltd., Tangshan Xingbang Pipeline Engineering Equipment Co., Ltd., Harbin Institute of Technology, Beijing Municipal Gas Thermal Engineering Design Institute Co., Ltd., Beijing Thermal Equipment Manufacturing Co., Ltd., Xi'an Shuangji Energy Saving Technology Co., Ltd., Tianjin Taihe Energy Saving Technology Co., Ltd., Hebei Fengcheng Pipeline Co., Ltd., Liaoning Hongxin Energy Saving Technology Co., Ltd., China Investment ( Tianjin) Intelligent Pipeline Co., Ltd., Hebei Yirui Testing Technology Co., Ltd., Langfang Huayu Tianchuang Energy Equipment Co., Ltd., Dalian Kaiyuan Pipeline Co., Ltd., Jiangfeng Pipeline Group Co., Ltd., Shandong Maosheng Pipe Industry Co., Ltd., Haolian Insulation Pipe Industry Co., Ltd., Hebei | Administrative Organization | National Urban Heating Standardization Technical Committee (SAC/TC 455) | Proposing organization | Ministry of Housing and Urban-Rural Development of the People's Republic of China | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | Standard ID | GB/T 28638-2012 (GB/T28638-2012) | Description (Translated English) | Heat loss test for thermal insulation structure and evaluation methods for thermal insulation efficiency of district heating pipes | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | P40 | Classification of International Standard | 91.140.60 | Word Count Estimation | 29,287 | Quoted Standard | GB/T 4132; GB/T 4272-2008; GB/T 8174; GB/T 10295; GB/T 10296; GB/T 17357; GB 50411; JJF 1059-1999; EN 12828-2003 | Drafting Organization | Beijing Research Institute of Public Utilities | Administrative Organization | National Standardization Technical Committee urban heating | Regulation (derived from) | National Standards Bulletin 2012 No. 17 | Proposing organization | Ministry of Housing and Urban-Rural Development of the People's Republic of China | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | Summary | This standard specifies the structure of urban heating pipe insulation heat loss and thermal insulation efficiency assessment terms and definitions, test methods, test grade and condition, test procedures, data processing, measurement error, test results, |
GB/T 28638-2023. Heat loss test and insulation effect evaluation method for urban heating pipe insulation structures
ICS 91.140.10
CCSP46
National Standards of People's Republic of China
Replace GB/T 28638-2012
Heat dissipation loss of urban heating pipe insulation structure
Testing and insulation effect assessment methods
Published on 2023-08-06
2024-03-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Table of contents
Preface III
1 range 1
2 Normative reference documents 1
3 Terms and Definitions 1
4 Test method 2
5 Test Classification and Requirements 9
6 Test procedures 10
7 Data processing 13
8 Test error 15
9 Insulation effect evaluation15
10 Test Report 16
Appendix A (normative) Cooling heat flux value correction 17
Appendix B (Normative) Calculation of the total heat release coefficient of the outer surface of the thermal insulation structure 19
Appendix C (informative) Heating pipeline conditions and meteorological data survey form 23
Appendix D (normative) Thermal balance method test data processing 25
Appendix E (informative) Test data record table for heat dissipation loss of heating pipe insulation structure 27
Appendix F (normative) The maximum allowable heat loss value of the heating pipe insulation structure is 29
Preface
This 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 replaces GB/T 28638-2012 "Heat dissipation loss test and insulation effect assessment method for urban heating pipe insulation structures" and is consistent with
Compared with GB/T 28638-2012, in addition to editorial changes, the main technical changes are as follows.
---Changed the scope of application (see Chapter 1, Chapter 1 of the.2012 edition);
--- Added terms and definitions for the comprehensive thermal resistance of pipeline insulation structures (see 3.1);
---Added test methods for pipes laid in pipe galleries and tunnels (see Chapter 4, Chapter 6, and Chapter 7);
---Changed the heat flow sensor error (see 4.1.6, 4.1.7 of the.2012 version);
---Deleted the on-site test conditions for heat flow meter testing (see 4.1.8~4.1.10 of the.2012 version);
---Changed the test method of thermocouples [see 4.2.6,.2012 version 4.2.5.2b)];
---Changed the test method of thermal resistance (see 4.2.7);
---Deleted the ambient temperature test conditions for surface temperature method testing [see.2012 version 4.2.6a), b)];
---Changed the conditions for calculating heat flow density of external protective tubes (see 4.3.5, 4.3.4 of the.2012 version);
---Changed the sampling and testing methods for pipeline soil thermal conductivity (see 4.3.10, 4.3.9 of the.2012 version);
---Deleted the requirement of the heat balance method on whether the pipeline is leaking [2012 version 4.4.2a)];
---Changed the maximum temperature of the heating source of the laboratory simulation test system [see 4.5.3a),.2012 version of 4.5.3a)];
---Changed the on-site test section and measuring point layout method [see 6.2.2d), e),.2012 version of 6.2.2d)];
---Added on-site environment measurement methods (see 6.4);
---Changed the pipeline operating conditions during testing (see 6.5.1, 6.4.1 of the.2012 version);
---Added on-site test conditions (see 6.5.2);
---Changed the data collection methods of heat flow meter method, surface temperature method and temperature difference method (see 6.5.5, 6.4.4 of the.2012 version);
---Added data collection method for thermal balance method (see 6.5.6);
---Added thermal balance method test data processing method (see 7.1.4);
---Added the calculation method of heat loss rate of heating pipe insulation structure (see 7.2.9);
---Changed the basis for thermal insulation effect evaluation (see 9.1,.2012 version of 9.1);
---Deleted the conformity assessment of test results (see 9.2 of the.2012 version);
---Added the classification of heat loss rate levels of heating pipe insulation structures (see 9.2);
---Changed the cooling heat flux value correction method (see Appendix A, Appendix A and Appendix B of the.2012 version);
---The maximum allowable heat loss value of the heating pipe insulation structure has been changed (see Appendix F).
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 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 Urban Heating Standardization Technical Committee (SAC/TC455).
This document was drafted by. Beijing Municipal Public Utilities Research Institute, China Urban Construction Research Institute Co., Ltd., China Municipal Engineering North China
Design and Research Institute Co., Ltd., Taizhou Longjiang Chemical Machinery Technology Co., Ltd., Tangshan Xingbang Pipeline Engineering Equipment Co., Ltd., Harbin Engineering
University of Technology, Beijing Gas Thermal Engineering Design Institute Co., Ltd., Beijing Thermal Equipment Manufacturing Co., Ltd., Xi'an Shuangji Energy Saving Technology Co., Ltd.
Division, Tianjin Taihe Energy Saving Technology Co., Ltd., Hebei Fengcheng Pipeline Co., Ltd., Liaoning Hongxin Energy Saving Technology Co., Ltd., CIC (Tianjin) Intelligent
Pipeline Co., Ltd., Hebei Yirui Testing Technology Co., Ltd., Langfang Huayu Tianchuang Energy Equipment Co., Ltd., Dalian Kaiyuan Pipeline Co., Ltd.
Company, Jiangfeng Pipeline Group Co., Ltd., Shandong Maosheng Pipe Industry Co., Ltd., Haolian Insulation Pipe Industry Co., Ltd., Hebei Qianhai Pipeline Manufacturing Co., Ltd.
Company, Liaoning Jiangfeng Insulation Materials Co., Ltd., Tianjin Tiandilong Pipe Industry Co., Ltd., Xinxing Cast Pipe Co., Ltd., Beijing Heating Power
Engineering Design Co., Ltd., Haotian Energy Saving Equipment Co., Ltd., Dalian Kehua Thermal Pipeline Co., Ltd., Hebei Junye Technology Co., Ltd.
Co., Ltd., Wanhua Chemical Group Co., Ltd., Inner Mongolia Weizhijie Energy Saving Equipment Co., Ltd., Tianjin Yugang Insulation Building Materials Co., Ltd.
Division, Yantai Shunda Polyurethane Co., Ltd., China Petroleum Engineering Construction Co., Ltd. North China Branch, Shanghai Kehua Thermal Pipeline Co., Ltd.
Company, Beijing Huaneng Thermal Insulation Engineering Co., Ltd., Tianjin University, Beijing China Construction Building Research Institute Co., Ltd., Sanjie Energy Saving New Materials Co., Ltd.
Co., Ltd., Qingdao Xinhuide Anti-corrosion Insulation Co., Ltd., Henan Ruite Thermal Pipe Technology Co., Ltd., Beijing Construction Engineering Quality No. 4
TESTS LIMITED.
The main drafters of this document. Bai Dongjun, Feng Wenliang, Luo Cheng, Yan Yongpeng, Wang Peng, Yang Xuefei, Bai Liying, Gao Hongze, Xiong Conggui, Qiu Huawei,
Hu Chunfeng, Liu Xihuai, Zhao Xiangbin, Xuan Lingguo, Liu Jianshe, Wang Lei, Ye Lianji, Zhai Baohuan, Zhang Songlin, Chen Junjie, Yan Jianguo, Sun Xiangfei,
Ning Jiangtao, Liu Xiuqing, Shi Wenbo, Gao Hui, Li Xianshi, Zheng Zhongsheng, Yang Qiu, Li Deheng, Leng Boxun, Yan Minghai, Yan Bixing, Ye Liuliang, Zhao Changying,
Chen Lei, Luo Wenfeng, Ma Xiaoyu, Chen Peng, Du Lisong, Yu Lukun, Ren Jing, Zhang Tao, Shen Xu, Wang Xueyue.
This document was first published in.2012 and this is the first revision.
Heat dissipation loss of urban heating pipe insulation structure
Testing and insulation effect assessment methods
1 Scope
This document specifies the test methods, test classifications and requirements for heat loss testing and insulation effect assessment of urban heating pipe insulation structures.
Test procedures, data processing, test errors, insulation effect evaluation and test reports.
This document is suitable for testing the heat loss and insulation effect of urban heating pipes, pipe accessories and insulation structures at pipe interfaces.
assessment.
2 Normative reference documents
The 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 4132 Thermal insulation materials and related terms
GB/T 8174 Testing and evaluation of thermal insulation effect of equipment and pipelines
GB/T 10295 Heat flow meter method for determination of steady-state thermal resistance and related characteristics of thermal insulation materials
GB/T 10296 Round tube method for determination of steady-state heat transfer properties of insulation layers
GB/T 27418 Evaluation and expression of measurement uncertainty
GB/T 29046 Testing method for technical indicators of prefabricated insulated pipes for urban heating
3 Terms and definitions
The terms and definitions defined in GB/T 4132 and GB/T 8174 and the following apply to this document.
3.1
Under steady-state heat transfer conditions, the ratio of the temperature difference between the inner and outer surfaces of the pipeline insulation structure to the linear heat flux density per unit length of the pipeline.
3.2
In the laboratory, the heat loss test of the pipeline insulation structure is carried out to simulate the environmental conditions and operating conditions of the heating pipeline.
3.3
During the laboratory simulation test, the thermal insulation structure coefficient calculated from the heat flow density measured on the pipeline and the internal and external surface temperatures of the pipeline insulation structure.
thermal coefficient.
3.4
metastable statepseudosteadystate
The heat transfer state when the average reading value of the heat flow sensor does not differ by more than 2% in two consecutive 5-min periods.
......
GB/T 28638-2012
ICS91.140.60
P40
National Standards of People's Republic of China
Urban heating pipe insulation heat loss test
And thermal insulation efficiency evaluation method
Issued on. 2013-02-01 2012-07-31 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 Test Method 2
5 Test conditions and grading 8
6 Test procedure 9
7 Data Processing 11
8 13 test error
9 Evaluation of test results 13
10 13 Test Report
Appendix A (normative) heat flux sensor surface emissivity correction factor of 15
Annex B (informative) outer jacket pipe surface thermal emission rate 16
Annex C (normative) heating the outer surface of the pipe insulation structure and approximate calculation of the total heat transfer coefficient 17
Annex D (informative) heating pipes and meteorological conditions along the DIQ 20
Annex E (informative) Heat pipe insulation heat loss test data table 21
Annex F (informative) maximum allowable heating pipe insulation heat loss values \u200b\u200b23
Foreword
This standard rule according to GB/T 1.1-2009 given draft.
The standard proposed by the Ministry of Housing and Urban-Rural Development of the People's Republic of China.
This standard by the National Standardization Technical Committee of urban heating (SAC/TC455) is responsible for centralized.
Drafting of this standard. Beijing Institute of Public Utilities Science, Beijing Municipal Construction Quality the fourth test, Beijing HTN
Pipeline Equipment Co., Ltd., Tianjin Pipeline Engineering Group Co., pipe insulation plant, Dalian benefit more pipeline Limited, Tianjin JS heating pipe
Road Equipment Engineering Co., Ltd. Tianjin Yu Gang insulation materials, Tangshan Xing State Pipeline Engineering Equipment Co., Tianjin Pipe Dragon World
Co., Ltd., Beijing buried pipe insulation plant, Qingdao Thermoelectric Group Co., Ltd., Beijing Ding super-heating pipe Limited, Qingdao Follette
Pipeline Co., Hebei Huafu pipeline corrosion insulation Ltd., China IPPR International Engineering Corporation.
The main drafters of this standard. Yang Jinlin, Baidong Jun, Jia Lihua, said Zhou from Liu Jin, Biao Gang, Ye Lianji, imperative Yan, Liu Xiuqing, in the spring of clear,
Liyan Shu, Ping Wenliang, Qiu Huawei, Ye Xihao, Chen Jie, Wang Muxiang, Duan Bo, Lu Junli, Huquan Xi, Gaucher, Shen Xu.
Urban heating pipe insulation heat loss test
And thermal insulation efficiency evaluation method
1 Scope
This standard specifies the urban heating pipe insulation and heat loss test insulation effect assessment terms and definitions, test methods, test
Classification and conditions, test procedures, data processing, error test, the test results and evaluation of test reports.
This standard applies to heating medium temperature of less than or equal to 150 ℃ of hot water, heating medium temperature less than or equal to 350 ℃ of steam
Urban heating pipes, pipe accessories and pipe interface portion insulation heat loss and insulation test effect evaluation.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 4132 insulation materials and related terms
GB/T 4272-2008 General technical equipment and pipeline insulation
GB/T 8174 Test and evaluation of equipment and pipeline insulation effect
GB/T 10295 steady insulation resistance and related properties - Heat flow meter
GB/T 10296 steady heat transfer properties of the insulation tube measuring method
GB/T 17357 equipment and pipeline insulation layer surface heat loss Heat flow meter site and surface temperature method
Construction Quality GB 50411 acceptance of energy efficient building
JJF1059-1999 Evaluation and Expression of Uncertainty in Measurement
EN12828.2003 building hot water heating system design (Heatingsystemsinbuildings-Designforwater-
basedheatingsystems)
3 Terms and Definitions
GB/T 4132 and GB/T 8174 defined in the following terms and definitions apply to this document.
3.1
Metastable pseudosteadystateofheatfluxtransducer heat flux sensor
In two consecutive 5min period, the average heat flux sensor readings differ by no more than 2% of the heat transfer state when.
3.2
Laboratory tests testinlaboratory
Pipe insulation heat loss test lab, environmental conditions and operating conditions simulated heat pipe carried out.
3.3
Heating pipe insulation apparent thermal conductivity equivalentthermalconductivityofthermalinsulation
constructionforheatingpipeline
When laboratory testing by the heating pipes measured heat flux, the surface temperature of the working tube and the outer protective tube surface temperature calculated insulation
Structural insulation thermal conductivity.
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