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GB/T 29046-2023: Detection methods of technical specification for pre-insulated district heating pipes
Status: Valid GB/T 29046: Evolution and historical versions
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Detection methods of technical specification for pre-insulated district heating pipes
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GB/T 29046-2023
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| GB/T 29046-2012 | English | RFQ |
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Test methods of technical specification for pre-insulated directly buried district heating pipes
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Basic data | Standard ID | GB/T 29046-2023 (GB/T29046-2023) | | Description (Translated English) | Detection methods of technical specification for pre-insulated district heating pipes | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | P46 | | Classification of International Standard | 91.140.10 | | Word Count Estimation | 70,740 | | Date of Issue | 2023-09-07 | | Date of Implementation | 2024-04-01 | | Older Standard (superseded by this standard) | GB/T 29046-2012 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 29046-2023: Detection methods of technical specification for pre-insulated district heating pipes
---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 91.140.10
CCSP46
National Standards of People's Republic of China
Replace GB/T 29046-2012
Testing methods for technical indicators of prefabricated insulated pipes for urban heating
heating pipes
Published on 2023-09-07
2024-04-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Table of contents
Preface III
1 Scope 1
2 Normative reference documents 1
3 Terms and Definitions 3
4 Appearance and structural dimensions 4
5 work tube 5
6 insulation layer 5
7 Outer protective tube (layer) 24
8 Hot water insulation pipe 36
9 Hot water insulation pipe joint 45
10 Hot water insulation pipe fittings 48
11 Hot water insulation pipe valve 54
12 Insulated pipe signal line 55
13 Steam insulation pipes and joints 56
14 Steam direct buried insulation pipe fittings 57
15 Anti-corrosion coating of steam directly buried insulated pipes and external protective pipes 57
16 Soil parameter testing 61
17 Data Processing 64
18 Test report 64
Foreword
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 29046-2012 "Technical Indicator Testing Methods for Prefabricated Directly Buried Insulated Pipes for Urban Heating" and is consistent with GB/T 29046-
Compared with.2012, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
---Changed the scope of application (see Chapter 1, Chapter 1 of the.2012 edition);
---Changed the terms and definitions of apparent thermal conductivity (see 3.1,.2012 version of 3.1);
---Changed the definition of aging treatment (see 3.2,.2012 version of 3.2);
---Changed the detection method of the extrusion deformation of the insulation layer structure (see 4.2.3, 4.4.1 of the.2012 version);
---Added the detection method of steel-plastic composite working pipe (see 5.2);
---Added detection methods for plastic work pipes (see 5.3);
---Changed the test method for thermal conductivity of insulation materials (see 6.1.8, 5.2.1.8 of the.2012 edition);
---Deleted the average fiber diameter airflow meter test method (see 5.2.3.2.3 of the.2012 edition);
---Changed the requirements for fiber average diameter testing instruments and equipment (see 6.3.1.2, 5.2.3.2.4 of the.2012 edition);
---Added a separation method for slag ball content detection (see 6.3.2.3);
---Changed the requirements for volume density testing instruments and equipment (see 6.3.5.1, 5.2.3.6.3 of the.2012 edition);
---Changed the requirements for moisture absorption testing instruments and equipment (see 6.3.9.2, 5.2.3.10.5 of the.2012 edition);
---Changed the requirements for water absorption sample size (see 6.3.11.1, 5.2.3.12.2 of the.2012 edition);
---Changed the requirements for water absorption testing instruments and equipment (see 6.3.11.2, 5.2.3.12.5 of the.2012 edition);
---Added the detection method of heating wire shrinkage (see 6.3.14);
---Changed the test item requirements for rock wool, glass wool and their products for thermal insulation (see 6.3.15, 5.2.3.1 of the.2012 edition);
---Changed the testing method for the appearance quality of calcium silicate and its products (see 6.5.1.1, 5.2.5.1 of the.2012 version);
---Added the detection method for the allowable dimensional deviation of calcium silicate and its products (see 6.5.2);
--- Added testing methods for the dimensional stability of calcium silicate and its products (see 6.5.3);
---Changed the detection methods of density and mass moisture content (see 6.5.4, 5.2.5.2 of the.2012 edition);
---Deleted the detection methods for linear shrinkage and cracks of calcium silicate and its products (see 5.2.5.3 of the.2012 version);
--- Added testing methods for the uniform temperature burning performance of calcium silicate and its products (see 6.5.5);
---Changed the implementation standards and testing methods for the compressive strength of calcium silicate and its products (see 6.5.7, 5.2.5.5 of the.2012 version);
---Changed the implementation standards and testing methods for the flexural strength of calcium silicate and its products (see 6.5.8, 5.2.5.6 of the.2012 version);
---Changed the detection methods of soluble ion content, leachate pH and corrosiveness of calcium silicate and its products (see 6.5.9,.2012
version 5.2.5.7);
---Changed the sample requirements for the hydrophobicity of calcium silicate and its products (see 6.5.10, 5.2.5.8 of the.2012 edition);
--- Added testing methods for the combustion performance of calcium silicate and its products (see 6.5.11);
---Added testing methods for flexible foam rubber and plastic insulation products (see 6.6);
--- Added detection methods for thermal insulation aerogels and their products (see 6.7);
---Changed the detection method of the maximum outer diameter of the outer protective pipe after foaming (see 7.1.13, 5.3.1.13 of the.2012 edition);
---Added the detection method of embrittlement temperature by dynamic mechanical properties method (DMA) of outer protective pipes (see 7.1.16);
---Added the detection method of embrittlement temperature of outer protective pipe pipe impact method (low temperature notch impact) (see 7.1.17);
---Added the detection method of metal outer sheath (see 7.3);
---Changed the detection method of joint insulation materials (see 9.1.1.2, 7.3.2 of the.2012 edition);
---Added the detection method of tensile and shear strength of electrofusion welded joints (see 9.1.3.1);
---Deleted the detection method of tensile and shear strength of hot melt welded joints (see 7.5 of the.2012 edition);
--- Added testing methods for environmental stress cracking resistance of electrofusion welded joints (see 9.1.3.2);
--- Added detection methods for insulation joints of overhead, pipe trenches, pipe corridors, and tunnel pipes (see 9.2);
---Added detection methods for plastic pipe fittings (see 10.2);
---Changed the minimum bending angle of the weld in Figure 17 (see Figure 17, Figure 15 of the.2012 version);
---Changed the testing method for valve pressure-bearing capacity testing (see 11.2, 9.1 of the.2012 edition);
---Changed the requirements for valve samples (see 11.3.2, 9.2.3 of the.2012 edition);
---Changed the detection method of valve load performance under axial stress conditions (see 11.3.4, 9.2.4.1 of the.2012 version);
---Added valve bending moment detection (see 11.3.5);
--- Added detection methods for the appearance, structural dimensions, and signal lines of insulation valves (see 11.4.2);
---Added the testing method for the sealing of the valve stem end of the thermal insulation valve (see 11.4.3);
---Added the detection method of steam pipe insulation joints (see 13.4);
---Added the testing method for the temperature resistance of polyethylene anti-corrosion layer (see 15.2.7);
---Added the detection method of moisture content of soil properties (see 16.2);
--- Increased soil density testing method for soil properties (see 16.3);
--- Testing methods for soil salt content that increase soil properties (see 16.4);
--- Increased soil pH testing methods for soil properties (see 16.5);
---Deleted the main testing equipment and instruments (see Table 2 of the.2012 version).
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 Public Utilities Research Institute, China Urban Construction Research Institute Co., Ltd., Beijing Thermal Equipment Manufacturing
Co., Ltd., Tangshan Xingbang Pipeline Engineering Equipment Co., Ltd., Taizhou Longjiang Chemical Machinery Technology Co., Ltd., Harbin Institute of Technology, Beijing
Gas and Thermal Engineering Design Institute Co., Ltd., China Municipal Engineering North China Design and Research Institute Co., Ltd., Tianhua Chemical Machinery and Automation Research
Design Institute Co., Ltd., Xi'an Shuangji Energy Saving Technology Co., Ltd., Tianjin Taihe Energy Saving Technology Co., Ltd., Dalian Yiduo Pipeline Co., Ltd., He
Beifengcheng Pipeline Co., Ltd., Liaoning Hongxin Energy Saving Technology Co., Ltd., China Investment (Tianjin) Intelligent Pipeline Co., Ltd., Hebei Yirui Testing
Technology Co., Ltd., Dalian Kaiyuan Pipeline Co., Ltd., Jiangfeng Pipeline Group Co., Ltd., Shandong Maosheng Pipe Industry Co., Ltd., Tianjin Zhonghao Heating
Engineering Co., Ltd., Hebei Qianhai Pipeline Manufacturing Co., Ltd., Liaoning Jiangfeng Insulation Materials Co., Ltd., Tianjin Tiandilong Pipe Industry Co., Ltd.
Company, Xinxing Cast Pipe Co., Ltd., Beijing Thermal Engineering Design Co., Ltd., Haotian Energy Saving Equipment Co., Ltd., Dalian Kehua
Thermal Pipeline Co., Ltd., Hebei Junye Technology Co., Ltd., Wanhua Chemical Group Co., Ltd., Inner Mongolia Weizhijie Energy Saving Equipment
Co., Ltd., Tianjin Yugang Insulation Building Materials Co., Ltd., Yantai Shunda Polyurethane Co., Ltd., China Petroleum Engineering Construction Co., Ltd.
North China Branch, Shanghai Kehua Thermal Pipeline Co., Ltd., Beijing Huaneng Thermal Insulation Engineering Co., Ltd., Tianjin University, Sanjie Energy Saving New Materials Co., Ltd.
Co., Ltd., Qingdao Xinhuide Anti-corrosion Insulation Co., Ltd., Henan Ruite Thermal Pipe Technology Co., Ltd., Beijing China Construction Engineering Research Institute
Institute Co., Ltd., Beijing Fourth Construction Engineering Quality Inspection Institute Co., Ltd.
The main drafters of this document. Bai Dongjun, Yang Xuefei, Luo Cheng, Feng Wenliang, Jia Lihua, Yan Yongpeng, Wang Peng, Chen Tao, Qiu Huawei, Pu Xuliang,
Hu Chunfeng, Liu Xihuai, Zhang Jingna, Guo Linxuan, Zhao Xiangbin, Xuan Lingguo, Liu Jianshe, Hu Tao, Zhai Baohuan, Zhang Songlin, Chen Junjie, Yan Jianguo,
Xiong Conggui, Zhang Yong, Ning Jiangtao, Liu Xiuqing, Chen Huadong, Ma Zongyong, Zhu Yanfei, Zhang Guoyu, Yang Qiu, Pan Cunye, Leng Boxun, Yan Minghai, Yan Bixing,
Ye Liuliang, Zhao Changying, Chen Lei, Luo Wenfeng, Rong Bo, Chen Peng, Du Lisong, Yu Lukun, Zhang Jinhua, Gao Xue, Shen Xu, Wang Yunyue.
This document was first published in.2012 and this is the first revision.
Testing methods for technical indicators of prefabricated insulated pipes for urban heating
Warning. Some test procedures specified in this document may lead to hazardous situations, and the user is responsible for taking appropriate safety and health measures.
1 Scope
This document stipulates the appearance and structural dimensions of urban heating prefabricated insulated pipes, working pipes, insulation layers, outer protective pipes (layers), hot water insulation pipes,
Hot water insulation pipe joints, hot water insulation pipe fittings, hot water insulation pipe valves, insulation pipe signal lines, steam insulation pipes and joints, steam direct burial
Detection methods for thermal insulation pipe fittings and anti-corrosion coatings for external protective pipes of steam directly buried thermal insulation pipelines, as well as soil parameter testing, main testing equipment and instruments, and data
Processing and testing reports.
This document is applicable to the detection and evaluation of technical indicators of prefabricated hot water and steam insulation pipes, fittings and interfaces for urban heating.
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 228.1 Tensile testing of metallic materials Part 1.Room temperature test methods
GB/T 241 Hydraulic test method for metal pipes
GB/T 699 High-quality carbon structural steel
GB/T 700 carbon structural steel
GB/T 1033.1 Determination of density of plastic non-foam plastics Part 1.Dip method, liquid pycnometer method and titration method
GB/T 1447 Test method for tensile properties of fiber reinforced plastics
GB/T 1449 Test method for bending properties of fiber reinforced plastics
GB/T 1463 Test methods for density and relative density of fiber reinforced plastics
GB/T 1549 Chemical analysis methods for fiber glass
GB/T 1766 Rating method for aging of paint and varnish coatings
GB/T 1839 Test method for quality of galvanized layer of steel products
GB/T 2406.2 Determination of combustion behavior of plastics by oxygen index method Part 2.Room temperature test
GB/T 2518 Continuous hot-dip galvanized and zinc alloy coated steel sheets and strips
GB/T 3087 Seamless steel pipes for low and medium pressure boilers
GB/T 3091 Welded steel pipes for low-pressure fluid transportation
GB/T 3280 Stainless steel cold-rolled steel plates and strips
GB/T 3682.1 Measurement of melt mass flow rate (MFR) and melt volume flow rate (MVR) of plastic thermoplastics
Set Part 1.Standard Methods
GB/T 3880.1 Aluminum and aluminum alloy plates and strips for general industrial use Part 1.General requirements
GB/T 3880.2 Aluminum and aluminum alloy plates and strips for general industrial use Part 2.Mechanical properties
GB/T 3880.3 Aluminum and aluminum alloy plates and strips for general industrial use Part 3.Dimensional deviations
GB/T 4336 Determination of multi-element content in carbon steel and medium-low alloy steel Spark discharge atomic emission spectrometry (conventional method)
GB/T 4956 Magnetic method for measuring the thickness of non-magnetic coatings on magnetic substrates
GB/T 5351 Pressure test method for short-term hydraulic failure of fiber-reinforced thermosetting plastic pipes
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