|
US$469.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 38588-2020: In-situ measurements of heat loss of insulating pipes for urban heat-supplying
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 38588-2020 | English | 469 |
Add to Cart
|
5 days [Need to translate]
|
In-situ measurements of heat loss of insulating pipes for urban heat-supplying
| Valid |
GB/T 38588-2020
|
PDF similar to GB/T 38588-2020
Basic data | Standard ID | GB/T 38588-2020 (GB/T38588-2020) | | Description (Translated English) | In-situ measurements of heat loss of insulating pipes for urban heat-supplying | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | P46 | | Classification of International Standard | 91.140.10 | | Word Count Estimation | 25,28 | | Date of Issue | 2020-03-31 | | Date of Implementation | 2021-02-01 | | Quoted Standard | GB/T 10295; GB/T 17357; JJF 1059.1-2012 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Summary | This standard specifies the terms, definitions and symbols, test methods, test grading and use conditions, test requirements, data processing, test errors and test reports of on-site detection methods for heat dissipation loss of urban heating and thermal insulation pipe network systems. This standard is applicable to the on-site detection of heat dissipation loss of urban heating and thermal insulation pipes, pipe joints and their accessories (hereinafter referred to as pipes) where the temperature of the hot water medium is less than or equal to 150��C and the temperature of the steam medium is less than or equal to 350��C. | GB/T 38588-2020: In-situ measurements of heat loss of insulating pipes for urban heat-supplying---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.
In-situ measurements of heat loss of insulating pipes for urban heat-supplying
ICS 91.140.10
P46
National Standards of People's Republic of China
Heat loss of urban heating and heat preservation pipe network system
On-site testing method
2020-03-31 release
2021-02-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Contents
Foreword I
1 Scope 1
2 Normative references 1
3 Terms, definitions and symbols 1
3.1 Terms and definitions 1
3.2 Symbol 2
4 Test Method 4
4.1 Heat flow meter method 4
4.2 Surface temperature method 4
4.3 Temperature difference method 6
4.4 Thermal balance method 7
5 Test classification and conditions of use 8
5.1 Test classification and selection 8
5.2 Test instruments and meters 8
6 Test requirements 9
6.1 Test preparation 9
6.2 Test cross-section and measuring point arrangement 9
6.3 Test environmental conditions 10
6.4 Test Step 11
7 Data processing 11
7.1 Data collation 11
7.2 Calculation of heat loss 11
8 Test error 13
8.1 Error analysis 13
8.2 Error range 13
9 Test report 13
Appendix A (Normative) Heat flux density correction 14
Appendix B (Normative Appendix) Calculation of Total Heat Transfer Coefficient by Surface Temperature Method 16
Appendix C (Normative Appendix) Questionnaire for Insulation Pipeline 19
Appendix D (Normative Appendix) Test Data Record Table for Thermal Loss of Thermal Insulation Structure of Thermal Insulation Pipeline 21
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the Ministry of Housing and Urban-Rural Development of the People's Republic of China.
This standard is under the jurisdiction of the National Urban Heating Standardization Technical Committee (SAC/TC455).
This standard was drafted by. Haotian Energy Saving Equipment Co., Ltd., Beijing Construction Engineering Quality Testing Institute No. 4, Beijing Gas Heating Power
Engineering Design Institute Co., Ltd., Hebei Haotian Thermal Development Co., Ltd., Changchun Thermal (Group) Co., Ltd., Hebei Huare Engineering
Design Co., Ltd., Harbin Institute of Technology, Beijing Haotene Pipeline Equipment Co., Ltd., Sichuan Xinzhongtai New Material Co., Ltd., Tangshan Xingbang Pipe
Engineering Equipment Co., Ltd., Harbin Langst Energy Saving Technology Co., Ltd., Tianjin Tiandilong Pipe Co., Ltd., Henan Sanjie Re
Electric Technology Co., Ltd., Hebei Junye Technology Co., Ltd., Dalian Kehua Thermal Pipeline Co., Ltd., Jiangfeng Pipeline Group Co., Ltd.
Division, Wanhua Chemical (Yantai) Sales Co., Ltd., Dow Chemical (China) Investment Co., Ltd., Shanghai Huntsman Polyurethane Co., Ltd., Hebei Feng
Cheng Pipeline Co., Ltd., Tianhua Chemical Machinery and Automation Research and Design Institute Co., Ltd., Langfang Huayu Tianchuang Energy Equipment Co., Ltd., Hebei
Yirui Testing Technology Co., Ltd., Hebei Haotian Energy Investment Group Co., Ltd., China Municipal Engineering North China Design and Research Institute Co., Ltd.,
Beijing Haotian Huaqing Municipal Engineering Design Co., Ltd.
The main drafters of this standard. Zheng Zhongsheng, Zhang Guoyu, Lang Kuiyuan, Bai Dongjun, Jia Zhen, Zhang Jianxing, Li Min, Zhang Qi, Wang Peng, Jia Lihua, Li Xiang,
Qiu Huawei, Lai Zhencheng, Liu Xiuqing, Chen Peng, Yang Zhili, Yang Qiu, Zhang Songlin, Pang Dezheng, Sun Tao, Zhong Hualiang, Zhao Xiangbin, Jia Hongqing, Duan Wenyu,
Qiu Xiaoxia, Wang Zhenhai, Yang Liangzhong, Wang Ying, Feng Wenliang and Zhang Zhiming.
Heat loss of urban heating and heat preservation pipe network system
On-site testing method
1 Scope
This standard specifies the terms, definitions and symbols of the on-site detection method for heat loss of urban heating and insulation pipe network system, test method, test
Classification and conditions of use, test requirements, data processing, test errors and test reports.
This standard applies to urban heating and heat preservation with hot water medium temperature less than or equal to 150 ℃ and steam medium temperature less than or equal to 350 ℃
On-site detection of heat loss of pipes, pipe interfaces and accessories (hereinafter referred to as pipes).
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.
GB/T 10295 Determination of steady-state thermal resistance and related characteristics of thermal insulation materials
GB/T 17357 On-site determination of surface heat loss of equipment and pipeline insulation layer Heat flow meter method and surface temperature method
JJF1059.1-2012 Evaluation and expression of measurement uncertainty
3 Terms, definitions and symbols
3.1 Terms and definitions
The following terms and definitions apply to this document.
3.1.1
Steady heat transfer
The heat transfer process in which the radial temperature of each point does not change with time in the thermal insulation layer of the thermal insulation pipeline.
3.1.2
Heat flowmeter method heatflowmeterapparatusmethod
Using thermal resistance type heat flow sensor (heat flow probe) and measurement indicator to directly measure the heat flow of the heat transfer of the insulation structure of the insulation pipe
Density test method.
3.1.3
Surface temperature method
By measuring the temperature of the outer surface of the thermal insulation structure, the ambient temperature, the wind direction and speed, the surface thermal emissivity, and the external dimensions of the thermal insulation structure, it is calculated
Its radial heat transfer test method of heat flux density.
3.1.4
Temperature difference method
By measuring the thickness of each layer of the insulation structure, the temperature at the interface of each layer, and the thermal conductivity of each layer of material at the use temperature,
Calculate the heat flux density test method for the radial heat transfer of the insulation structure.
3.1.5
Heat balance method
Under the stable operating conditions of the pipe network system, on-site determination of the medium flow of the measured pipeline, the medium temperature and (or) pressure of the beginning and end of the pipeline
Force, according to the enthalpy difference method or the principle of energy balance, the method of calculating the whole heat loss value of the pipeline.
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 38588-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 38588-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of GB/T 38588-2020_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 38588-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.
|