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GB/T 4994-2015: Iron/Copper-Nickel (Constantan) thermocouple wires
Status: Valid GB/T 4994: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4994-2015 | English | 279 |
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3 days [Need to translate]
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Iron/Copper-Nickel (Constantan) thermocouple wires
| Valid |
GB/T 4994-2015
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| GB/T 4994-1998 | English | 439 |
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4 days [Need to translate]
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Iron/Copper-Nickel(Constantan) thermocouple wires
| Obsolete |
GB/T 4994-1998
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| GB/T 4994-1985 | English | RFQ |
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3 days [Need to translate]
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Iron/copper-nickel (constantan) thermocouple wires and reference table
| Obsolete |
GB/T 4994-1985
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PDF similar to GB/T 4994-2015
Basic data | Standard ID | GB/T 4994-2015 (GB/T4994-2015) | | Description (Translated English) | Iron/Copper-Nickel (Constantan) thermocouple wires | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N11 | | Classification of International Standard | 17.200 | | Word Count Estimation | 13,192 | | Date of Issue | 2015-05-15 | | Date of Implementation | 2015-12-01 | | Older Standard (superseded by this standard) | GB/T 4994-1998 | | Quoted Standard | GB/T 16701; GB/T 16839.1-1997; JB/T 6819.2 | | Regulation (derived from) | National Standard Announcement 2015 No. 15 | | 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 iron - copper-nickel (constantan) thermocouple wire product classifications, technical requirements, test methods, inspection rules, modes of supply, packaging and marking. This Standard applies to the manufacture of industrial iron - copper-nickel (constantan) thermocouple ((J-type thermocouple) alloy wire (hereinafter referred to as the dual wire). | GB/T 4994-2015: Iron/Copper-Nickel (Constantan) thermocouple wires---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.
Iron/Copper-Nikkel (Constantan) thermocouple wires
ICS 17.200
N11
National Standards of People's Republic of China
Replacing GB/T 4994-1998
Iron - copper-nickel (constantan) thermocouple wire
Iron/Copper-Nickel (Constantan) thermocouplewires
Issued on. 2015-05-15
2015-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 4994-1998 "iron - copper-nickel (constantan) thermocouple wire."
The main difference compared with the standard GB/T 4994-1998 as follows.
--- Modify products numerals method;
--- Thermal emf tolerance ASTME230-2012 reference standards, and the original standard thermal electromotive force tolerance is used
IEC 584-2.1995 standard requirements;
--- Adjust the order of A and Appendix B of the Appendix.
The standard proposed by China Machinery Industry Federation.
The standard instrument functional materials by the National Standardization Technical Committee (SAC/TC419) centralized.
This standard is drafted by. Institute of Materials Co., Ltd., Chongqing.
Participated in the drafting of this standard. Jiangsu Huaxin Alloy Co., Ltd., Chongqing Sichuan Instrument Automation Co., Ltd. metal functional materials at public
Division seventeen Chongqing Sichuan Instrument Co., Ltd., Anhui Rand Group Co., Ltd., Changzhou Lucheng Albert Alloy Factory, Zhejiang Lent Electrical Co.
The company, Shandong Liqun Alloy Co., Ltd., Shenyang Institute of pyrometer Sheet Material Co., Ltd.
The main drafters of this standard. Ho Ying-lun, Chen Lixin, Qin Hua Yuan, Lee joint text, Wu Lei, Wang Bowei, Yin Shing House, Wu Galen, tension group, Chen,
Qibao Jun, Chen Jie, Chen Dong.
This standard replaces the standards previously issued as follows.
--- GB/T 4994-1985, GB/T 4994-1998.
Iron - copper-nickel (constantan) thermocouple wire
1 Scope
This standard specifies the iron - copper-nickel (constantan) thermocouple wire product classification, technical requirements, test methods, inspection rules, modes of supply, including
Installation and flag.
This standard applies to manufacturing industry iron - copper-nickel (constantan) thermocouple (J-type thermocouple) alloy wire (hereinafter referred to as dual wire).
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 16701 precious metal, metal thermocouple wire thermal EMF measurement
GB/T 16839.1-1997 Thermocouples - Part 1. indexing table
JB/T 6819.2 meter material term temperature materials
3 Terms and Definitions
Terms and definitions JB/T 6819.2 defined apply to this document.
4 Products
4.1 Product name, code and nominal chemical composition
Product name, code and the name of the chemical composition as shown in Table 1.
Table 1 Product name, code and nominal chemical composition
Product Name polarity code
Nominal chemical composition (mass fraction) /%
Fe Cu Ni
Pure wire cathode JP 100 - -
Copper-nickel alloy wire negative JN - 55 45
4.2 grade thermocouple wire
Thermocouple wire according to the requirements of tolerance and pyroelectric properties, divided into grade Ⅰ, Ⅱ and Ⅲ grade level classification conditions by the technical requirements.
4.3 dual wire recommended upper temperature limit
Thermocouple wire of various diameters recommended upper temperature limit as shown in Table 2.
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