GB/T 26302-2020 English PDF (GBT26302-2020)

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GB/T 26302-2020: Seamless copper and copper alloy tube for heat pipe
GB/T 26302-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.30
H 62
Replacing GB/T 26302-2010
Seamless Copper and Copper Alloy Tube for Heat Pipe
ISSUED ON: SEPTEMBER 29, 2020
IMPLEMENTED ON: AUGUST 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 7
4 Classification and Sign ... 8
5 Technical Requirements ... 10
6 Test Methods ... 16
7 Inspection Rules ... 17
8 Marking, Packaging, Transportation, Storage and Quality Certificate ... 21
9 Purchase Order (or Contract) Contents ... 22
Seamless Copper and Copper Alloy Tube for Heat Pipe
1 Scope
This Standard specifies the classification and sign, technical requirements, test
methods, inspection rules, markings, packaging, transportation, storage, quality
certificates and purchase orders (or contracts) of seamless copper and copper alloy
tubes for heat pipe.
This Standard is applicable to the seamless copper and copper alloy round tubes
(hereinafter referred to as tubes) used in the container of low and medium temperature
heat pipe components for heat collection, heat transfer, and heat exchange.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) is applicable to this document.
GB/T 242 Metal Materials – Tube – Drift-Expanding Test
GB/T 246 Metallic Materials – Tube – Flattening Test
GB/T 351 Metallic Materials – Resistivity Measurement Method
GB/T 2828.1 Sampling Procedures for Inspection by Attributes – Part 1: Sampling
Schemes Indexed Acceptance Quality Limit (AQL) for Lot-by-Lot Inspection
GB/T 4340.1 Metallic Materials – Vickers Hardness Test – Part 1: Test Method
GB/T 5121 (all parts) Methods for Chemical Analysis of Copper and Copper Alloys
GB/T 5231 Designation and Chemical Composition of Wrought Copper and
Copper Alloys
GB/T 5248 Electromagnetic (Eddy-Current) Examination of Copper and Copper
Alloy Seamless Tube
GB/T 8170 Rules of Rounding off for Numerical Values and Expression and
Judgement of Limiting Values
GB/T 8888 Wrought Heavy Non-Ferrous Metal Products-Packing, Marking,
Transporting, Storing and Quality Certificate
GB/T 14811-2008 Heat Pipe Terminology
GB/T 17791-2017 Seamless Copper and Copper Alloys Tube for Air Conditioner
and Refrigeration Equipment
GB/T 23606-2009 Copper-Hydrogen Embrittlement Test Method
GB/T 26303.1 Measuring Method for Dimensions and Shapes of Wrought Copper
and Copper Alloy - Part 1: Tube
GB/T 32791 Electromagnetic (Eddy-Current) Examination Method for Electrical
Conductivity of Copper and Copper Alloys
GB/T 34505-2017 Copper and Copper Alloy Materials - Tensile Testing at Room
Temperature
YS/T 347 Copper and Copper Alloys - Estimation of Average Grain Size
YS/T 482 Methods for Analysis of Copper and Copper Alloys - The Atomic
Emission Spectrometry
YS/T 483 Methods for Analysis of Copper and Copper Alloys - X-Ray
Fluorescence Spectrometric (Wavelength Dispersive)
YS/T 668 The Sampling Method of Physical and Chemical Testing for Copper and
Copper Alloys
YS/T 815 Preparation Method of Test Pieces for Mechanical and Technological
Properties of Copper and Copper Alloys
YS/T 999 Capillary Tube of Copper and Copper Alloy - Eddy Current Testing
Method
3 Terms and Definitions
For the purpose of this document, the terms and definitions given in GB/T 14811-2008
and the following apply. For the benefit of use, some terms and definitions in GB/T
14811-2008 are listed repeatedly.
3.1 Heat pipe
The evaporating, condensing, and heat transfer device that drives the circulating flow
of the working fluid with the suction effect of the capillary structure.
Smooth-wall coiled tube GB/T 26302-TU0 O50-φ6.00×0.50
Or smooth-wall coiled tube GB/T 26302-T10130 O50-φ6.00×0.50
Example 3: The inner-grooved straight tube is signed by TU2 (T10180) manufacture, supply
state of light draw (H55), outer diameter 8.00mm, bottom wall thickness 0.30mm, height of tooth
0.20mm, width of groove bottom 0.25mm, addendum angle 5°, helix angle 0°, the number of
grooves 70, length 3500mm as follows:
Inner-grooved straight tube GB/T 26302-TU2 H55-8.00×0.30×0.20×0.25-5-0/70×3500
Or inner-grooved straight tube GB/T 26302-T10180 H55-8.00×0.30×0.20×0.25-5-0/70×3500
Example 4: The inner-grooved coiled tube is singed by TP1(C12000) manufacture, supply state
of light annealing (O50), outer diameter 6.00mm, bottom wall thickness 0.25mm, height of tooth
0.20mm, width of groove bottom 0.16mm, addendum angle 5°, helix angle 2°, the number of
grooves 50 as follows:
Inner-grooved coiled tube GB/T 26302-TP1 O50-6.00×0.25×0.20×0.16-5-2/50
Or inner-grooved coiled tube GB/T 26302-C12000 O50-6.00×0.25×0.20×0.16-5-2/50
5 Technical Requirements
5.1 Chemical composition
The chemical composition of the tube shall comply with the provisions of the
corresponding designation specified in GB/T 5231.
5.2 Overall dimensions and allowable deviations
5.2.1 The dimensions of smooth-wall tubes and their allowable deviations
The overall dimensions and allowable deviations of the smooth-wall tubes shall comply
with the provisions of Tables 2 and 3.
6 Test Methods
6.1 Chemical composition
The chemical composition analysis of the tube shall be carried out in accordance with
the provisions of GB/T 5121 (all parts) or YS/T 482, YS/T 483; and the arbitration shall
be carried out in accordance with the provisions of GB/T 5121 (all parts).
6.2 Overall dimension and allowable deviation
The measurement methods for overall dimension and its allowable deviation of the
tube shall be carried out in accordance with the provisions of GB/T 26303.1.
6.3 Mechanical properties
The tensile test of the tube is carried out in accordance with the provisions of GB/T
34505-2017; the tube with an outer diameter of no more than 30mm shall be carried
out in accordance with the provisions of full-section specimens; and the tube with an
outer diameter of more than 30mm~50mm shall be carried out in accordance with the
provisions of S1 specimens specified in GB/T 34505-2017.
The Vickers hardness test of the tube shall be carried out in accordance with the
provisions of GB/T 4340.1.
6.4 Process performance
The flaring test of the tube shall be carried out in accordance with the provisions of
GB/T 242.
The flattening test of the tube shall be carried out in accordance with the provisions of
GB/T 246.
6.5 Conductivity
The conductivity test of the tube shall be carried out in accordance with the provisions
of GB/T 351 or GB/T 32791; and the arbitration shall be carried out in accordance with
the provisions of GB/T 351.
6.6 Grain size
The grain size inspection of the tube shall be carried out in accordance with provisions
of YS/T 347.
6.7 Hydrogen embrittlement test
The hydrogen embrittlement test of oxygen-free copper tube is carried out in
accordance with the closed bending method (6.2) in GB/T 23606-2009; and the
arbitration is carried out in accordance with the repeated bending method (6.3) in GB/T
23606, and the number of bending is no less than 6 times.
6.8 Eddy current flaw detection
The eddy current ...