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GB/T 18404-2022: Mineral insulated metal-sheathed thermocouple cables and thermocouples
Status: Valid GB/T 18404: Evolution and historical versions
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| GB/T 18404-2022 | English | 479 |
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Mineral insulated metal-sheathed thermocouple cables and thermocouples
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GB/T 18404-2022
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| GB/T 18404-2001 | English | 439 |
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Mineral insulated thermocouple cables and thermocouples
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PDF similar to GB/T 18404-2022
Basic data | Standard ID | GB/T 18404-2022 (GB/T18404-2022) | | Description (Translated English) | Mineral insulated metal-sheathed thermocouple cables and thermocouples | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N05 | | Classification of International Standard | 17.200.20 | | Word Count Estimation | 26,275 | | Date of Issue | 2022-10-14 | | Date of Implementation | 2023-05-01 | | Older Standard (superseded by this standard) | GB/T 18404-2001 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 18404-2022: Mineral insulated metal-sheathed thermocouple cables and thermocouples---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.
Mineral insulated metal-sheathed thermocouple cables and thermocouples
ICS 17.200.20
CCSN05
National Standards of People's Republic of China
Replacing GB/T 18404-2001
Armored Thermocouple Cable and Armored Thermocouple
(IEC 61515.2016, IDT)
Published on 2022-10-12
2023-05-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 General rule 2
4.1 Armored Thermocouple 2
4.2 Thermoelectromotive force 2
4.3 Materials and properties 2
4.4 Upper temperature limit 3
4.5 Size 3
5 Requirements and verification tests 7
5.1 General requirements7
5.2 Armoured Thermocouple Cables. Requirements and Proof Tests 8
5.3 Sheathed Thermocouples. Requirements and Proof Tests 10
6 Armoured thermocouple cable preparation for delivery 14
7 Packaging 14
8 signs 14
9 Quality certification documents 14
Appendix A (Informative) Alternate Wire Arrangement 15
A.1 Overview 15
A.2 Double-branched armored thermocouple cable and armored thermocouple 15
A.3 Three-piece armored thermocouple cable and armored thermocouple 15
Appendix B (Informative) Chemical Composition of Mineral Insulating Materials 18
Appendix C (Informative) Reference Temperature Upper Limit 19
Appendix NA (informative) Casing material grade comparison 21
Figure 1 Schematic diagram of cross-section of single-branched armored thermocouple cable and armored thermocouple 4
Figure 2 Schematic diagram of cross-section of double-branched armored thermocouple cable and armored thermocouple 5
Figure 3 Schematic diagram of the cross-section of the three-branched sheathed thermocouple cable and sheathed thermocouple 6
Figure 4 Longitudinal section of the grounded measuring end 10
Figure 5 Longitudinal section of insulated measuring end 11
Figure A.1 Double-branched sheathed thermocouple cable and alternative arrangement of sheathed thermocouple wires 15
Figure A.2 Three-branched sheathed thermocouple cable and alternative arrangement of sheathed thermocouple wires (1) 16
Figure A.3 Three-branched sheathed thermocouple cable and alternative arrangement of sheathed thermocouple wires (2) 16
Figure A.4 Three-branched sheathed thermocouple cable and alternative arrangement of sheathed thermocouple wires (3) 17
Table 1 Single-branched armored thermocouple cable and armored thermocouple size specification4
Table 2 Double-branched armored thermocouple cable and armored thermocouple size specification5
Table 3 Three-branched armored thermocouple cable and armored thermocouple size specification 6
Table 4 Armored thermocouple cable and armored thermocouple test 7
Table 5 Electric strength test voltage 9
Table 6 Minimum room temperature insulation resistance (armoured thermocouple cable) 9
Table 7 High temperature insulation resistance (armoured thermocouple cable) 10
Table 8 Minimum insulation resistance at room temperature (insulated armored thermocouple) 13
Table 9 High temperature insulation resistance (insulation armored thermocouple) 13
Table B.1 Magnesium oxide (MgO) recommended reference value 18
Table B.2 Alumina (Al2O3) Recommended reference value 18
Table C.1 Upper Reference Temperature Limits for Armored Thermowell and Wire Combinations 19
Table NA.1 Casing material grade comparison table 21
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 of Standardization Documents"
drafted.
This document replaces GB/T 18404-2001 "Armored Thermocouple Cables and Armored Thermocouples". Compared with GB/T 18404-2001, except for the junction
In addition to structural adjustments and editorial changes, the main technical changes are as follows.
--- Added double-branched and three-branched armored thermocouples (see 4.3.2);
--- Changed the requirements for insulation resistance, so that users can choose the best product according to their needs (see 5.2.2.5, 5.2.2.6, 5.3.2.4,
5.3.2.5, 4.2.2.2, 5.2.2 of the.2001 edition);
--- "Recommended maximum operating temperature" adds casing material and moves to Appendix C (see Table C.1, 4.2.1.1 of the.2001 edition);
--- Added Table 4 "Inspection Items and Inspection Methods" for ease of use (see 5.1).
This document is equivalent to IEC 61515.2016 "Armored thermocouple cables and sheathed thermocouples".
The following minimal editorial changes have been made to this document.
--- Added informative appendix NA "Sleeve material grade comparison".
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China Machinery Industry Federation.
This document is under the jurisdiction of the National Standardization Technical Committee for Instrumentation Functional Materials (SAC/TC419).
This document is drafted by. Chongqing Materials Research Institute Co., Ltd., Anhui Tiankang (Group) Co., Ltd., Ningbo Aoqi Automation Instrumentation
Equipment Co., Ltd., Shanghai Industrial Automation Instrumentation Research Institute Co., Ltd., Guangzhou Panyu Cable Group Co., Ltd., China Aviation Industry Corporation
Company Beijing Great Wall Measurement and Testing Technology Research Institute, Shenzhen China Cable Group Co., Ltd., Chongqing Chuanyi 17 Factory Co., Ltd., Henan Science and Technology Co., Ltd.
University, WIKA Automation Instrumentation (Suzhou) Co., Ltd., Chongqing Chuanyi Automation Co., Ltd. Metal Functional Materials Branch, Henan Polytechnic
University, Zhejiang Chunhui Instrument Co., Ltd., Zhejiang Lunte Electromechanical Co., Ltd., Chongqing Dazheng Instrument Co., Ltd., Xinguo Group
Co., Ltd., Shaoxing Shangyu Shenzhou Instrument Co., Ltd., Shenyang China Color Temperature Measuring Instrument Materials Research Institute Co., Ltd., Zhejiang Taisuo Technology Co., Ltd.
Company, Anhui Huining Electrical Instrument Group Co., Ltd., Lande Energy Technology Co., Ltd., Chongqing Three Gorges Cable (Group) Co., Ltd., Anhui
Hui Pacific Cable Co., Ltd., Hechang Electric (Zhaoqing) Co., Ltd.
The main drafters of this document. He Lunying, Wu Chengshan, Su Xinli, Mao Wenjie, Sun Jiong, Fan Kai, Lu Guangye, Zhao Nan, Wu Haimin, Kang Wenjie,
Song Kexing, Yang Xiaoliang, Feng Linjiang, Lin Tao, Xu Yonghong, Cao Jun, Zou Hua, Wu Fangliang, Zhou Hongqin, Qin Youguo, Jiang Jian, Qi Baojun, Wu Yongjun, Lu Jiong,
Chen Xingguo, Zhang Chi, Wu Yang, Yang Yongliang, He Yaowei, Lv Fazhong, Luo Junmin, Li Fangfang, Dai Wei, Sun Zhichao.
The previous versions of this document and its superseded documents are as follows.
---First published in.2001 as GB/T 18404-2001;
---This is the first revision.
Armored Thermocouple Cable and Armored Thermocouple
1 Scope
This document specifies the general industrial single-branch, double-branch and three-branch mineral insulated metal sheathed thermocouple cables (hereinafter referred to as "armoured"
Thermocouple cables”) and mineral insulated metal sleeve thermocouples (hereinafter referred to as “armoured thermocouples”).
This document applies to T, J, E, K, N type low-cost metal armored thermocouple cables and armored thermocouples. This document applies to
Newly made sheathed thermocouple cables and sheathed thermocouples are not suitable for products that have been put into service.
This document does not cover requirements for external sealing, terminals, connectors and other accessories.
This document does not apply to precious metal sheathed thermocouple cables and sheathed thermocouples. The special requirements for the main circuit of nuclear power plants are determined by other standards
Regulation.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document.
ISO 1302 Geometrical Product Specifications (GPS) Representation of Surface Structures in Technical Product Documents (GeometricalProduct
Note. Representation of surface structure in GB/T 131-2006 Product Geometry Specification (GPS) Technical Product Document (ISO 1302.2002, IDT)
Note. GB/T 2423.10-2019 Environmental Testing Part 2.Test Method Test Fc. Vibration (Sinusoidal) (IEC 60068-2-6.2007, IDT)
IEC 60584-1 Thermocouples Part 1.Electromotive force specifications and tolerances (Thermocouples-Part 1.EMFspecificationsand
Note. GB/T 16839.1-2018 Thermocouple Part 1.Electromotive force specification and tolerance (IEC 60584-1.2013, IDT)
3 Terms and Definitions
The terms and definitions defined in IEC 60584-1 and the following terms and definitions apply to this document.
3.1
A flexible and solid assembly made by insulating one or more pairs of thermocouple wires with mineral insulating materials and placing them in a metal sleeve by compaction.
Note. Mineral insulated metal sleeve is abbreviated as armored (MIMS).
3.2
Armored Thermocouple MIMSthermocouple
Thermocouple made of sheathed thermocouple cable (3.1).
3.3
single thermocouple simplexthermocouple
A thermocouple made from a pair of thermocouple wires.
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