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GB/T 18404-2022Mineral insulated metal-sheathed thermocouple cables and thermocouples (English PDF)

铠装热电偶电缆及铠装热电偶

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

October 14, 2022

Implementation date

May 1, 2023

Scope

GB/T 18404-2022 is the English-translated version of 铠装热电偶电缆及铠装热电偶.

GB/T 18404-2022 is the Chinese standard "Mineral insulated metal-sheathed thermocouple cables and thermocouples".

Its scope clause reads: 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. Its clauses include terms and definitions.

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Document preview — GB/T 18404-2022

National Standard of the People's Republic of China

ICS: 17.200.20
Classification: N 05
Replacing: GB/T 18404-2001

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 General rule
4.1 Armored Thermocouple
4.2 Thermoelectromotive force
4.3 Materials and properties
4.4 Upper temperature limit
4.5 Size
5 Requirements and verification tests
5.1 General requirements
5.2 Armoured Thermocouple Cables. Requirements and Proof Tests
5.3 Sheathed Thermocouples. Requirements and Proof Tests
6 Armoured thermocouple cable preparation for delivery
7 Packaging
8 signs
9 Quality certification documents
Appendix A (Informative) Alternate Wire Arrangement
Appendix B (Informative) Chemical Composition of Mineral Insulating Materials
Appendix C (Informative) Reference Temperature Upper Limit
Appendix NA (informative) Casing material grade comparison

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

A thermocouple made from a pair of thermocouple wires.

GB/T 903 | GB/T 7962.2 | GB/T 10586 | GB/T 45908 | GB/T 44455 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 44 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 1302 · ISO 1302.2002 · IEC 60068 · IEC 60584

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