GB/T 4993-2010Nickel-Chrominum/Copper-Nickel(Constantan) thermocouple wires (English PDF)
镍铬-铜镍（康铜）热电偶丝
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 1, 2010
Implementation date
May 1, 2011
Scope
GB/T 4993-2010 is the English-translated version of 镍铬-铜镍（康铜）热电偶丝.
GB/T 4993-2010 is the Chinese standard "Nickel-Chrominum/Copper-Nickel(Constantan) thermocouple wires". Its scope clause reads: This standard specifies the nickel-chromium - copper-nickel (constantan) thermocouple wire product classification, technical requirements, test methods, inspection rules, modes of supply, including Installation and flag.
This standard applies to the manufacture of industrial nickel-chromium - copper-nickel (constantan) thermocouple (E thermocouple) alloy wire (hereinafter referred to as dual wire). Its clauses include terms and definitions; products.
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Document preview — GB/T 4993-2010
National Standard of the People's Republic of China
- ICS
- 17.200.20
- Classification
- N 11
- Replacing
- GB/T 4993-1998
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Products
1 Scope
This standard specifies the nickel-chromium - copper-nickel (constantan) thermocouple wire product classification, technical requirements, test methods, inspection rules, modes of supply, including
Installation and flag.
This standard applies to the manufacture of industrial nickel-chromium - copper-nickel (constantan) thermocouple (E thermocouple) alloy wire (hereinafter referred to as dual wire).
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 16701 precious metal, metal thermocouple wire Thermal EMF Test Method
GB/T 16839.1 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 established apply to this standard.
4 Products
4.1
Product name, code and the name of the chemical composition shown in Table 1.
Table 1 Categories and nominal chemical composition
Product Name polarity code
Nominal chemical composition (mass fraction) /%
Ni Cr Cu
Nichrome wire cathode EP 90 10 -
Copper-nickel alloy wire negative EN 45 - 55
4.2 grade thermocouple wire
Thermocouple wire according to requirements and thermoelectric properties were divided into grade I, grade II and III grade.
4.3 dual wire recommended upper temperature limit
Thermocouple wire of various diameters recommended upper temperature limit as shown in Table 2.
Table 2 dual wire recommended upper temperature limit
Thermocouple wire diameter mm
Long-term use temperature limit
Short-term use temperature limit
0.3, 0.5, 350 450
0.8,1.0,1.2 450,550
1.6, 2.0 550 650 […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Cited by
- GB/T 16701-2010Methods for measuring the thermoelectric force of noble metal and base matal thermocouple wires
- GB/T 16701.1-1996Methods for measuring the thermoelectric force of noble metal and base metal thermocouple wires
- GB 4990-1985Alloy wires of extension and compensating cables for thermocouples
Similar standards
Editions of GB/T 4993
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4993-2010 | Nickel-Chrominum/Copper-Nickel(Constantan) thermocouple wires | current edition | Current |
| GB/T 4993-1998 | Nickel-Chrominum/Copper-Nickel(Constantan) thermocouple wires | previous edition | Superseded |
This page sells the current edition, GB/T 4993-2010. Earlier editions are listed for reference only.
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