GB/T 42512-2023 PDF English
US$230.00 · In stock · Download in 9 secondsGB/T 42512-2023: Copper alloy seamless coil tube for sheath Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid
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| GB/T 42512-2023 | English | 230 |
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Copper alloy seamless coil tube for sheath
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GB/T 42512-2023: Copper alloy seamless coil tube for sheath---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT42512-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.30
CCS H 62
Copper Alloy Seamless Coil Tube for Sheath
ISSUED ON: MAY 23, 2023
IMPLEMENTED ON: DECEMBER 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 5
4 Classification and Labelling ... 5
5 Technical Requirements ... 6
6 Test Methods ... 8
7 Inspection Rules ... 10
8 Marking, Packaging, Transportation, Storage and Accompanying Document ... 13
9 Contents of Order Form ... 14
Copper Alloy Seamless Coil Tube for Sheath
1 Scope
This Document stipulates the classification and labeling, technical requirements, test methods,
inspection rules, marking, packaging, transportation, storage and accompanying documents and
order forms of copper alloy seamless coil tube for sheath (hereinafter referred to as "tube").
This Document is applicable to copper alloy seamless coil tube for sheath used in high-speed
railways, urban rail transit, communication optical cables, safety conductor cables and other
fields.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in 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 Metallic Materials Tube - Drift Expanding Test
GB/T 246 Metallic Materials - Tube - Flattening Test
GB/T 2828.1 Sampling procedures for inspection by attribute - Part1: Sampling schemes
indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 3048.2 Test methods for electrical properties of electric cables and wires - Part 2:
Test of electrical resistivity of metallic materials
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 alloy
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of
limiting values
GB/T 8888 Wrought heavy non-ferrous metal products - Packing, marking, transporting
and storing
GB/T 10567.2 Wrought copper and copper alloys - Detection of residual stress - Ammonia
test
GB/T 26125 Electrical and electronic products - Determination of six regulated substances
(lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls,
polybrominated diphenyl ethers)
GB/T 26303.1 Measuring method for dimensions and shapes of wrought copper and
copper alloy - Part 1: Tube
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 Method 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 Sampling method of physical and chemical testing for copper and copper alloys
3 Terms and Definitions
For the purposes of this Document, the following terms and definitions apply.
3.1 Precise coiling coil
The tubes in the delivery state are finished by the winding machine and turned into coils
arranged relatively regularly up and down.
3.2 Free coiling coil
After the tube is produced, it is cut into rolls by a stretching machine, forming an irregularly
arranged coil in the basket.
4 Classification and Labelling
4.1 Product classification
The designation, code, state, type and specification of the tube shall comply with the provisions
of Table 1.
6.2 Overall dimension and its tolerance
The measurement method of overall dimension and its tolerance of the tube shall be carried out
in accordance with the provisions of GB/T 26303.1.
6.3 Mechanical properties
6.3.1 The tensile test of the tube shall be carried out in accordance with the provisions of GB/T
34505-2017. The tensile test specimens with an outer diameter of the tube less than or equal to
30mm shall be carried out in accordance with the provisions of full-section specimens specified
in GB/T 34505-2017. For the tube with outer diameter greater than 30mm, it shall be carried
out according to the provisions of S1 specimen specified in GB/T 34505-2017.
6.3.2 The hardness test method of the tube shall be carried out in accordance with the provisions
of GB/T 4340.1.
6.4 Volume resistivity
The measurement method of the volume resistivity of the tube shall be carried out according to
the method specified in GB/T 3048.2.
6.5 Process performance
6.5.1 The drift-expanding test of the tube shall be carried out in accordance with the provisions
of GB/T 242.
6.5.2 The flattening test of the tube shall be carried out in accordance with the provisions of
GB/T 246.
6.6 Grain size
The grain size inspection of the tube shall be carried out in accordance with the provisions of
YS/T 347.
6.7 Environmental requirements
The detection of harmful substance content in the tube shall be carried out in accordance with
the provisions of GB/T 26125.
6.8 Residual stress
The residual stress test of the tube shall be carried out in accordance with the provisions of
GB/T 10567.2.
6.9 Surface quality
The surface quality of the tube is inspected visually.
7 Inspection Rules
7.1 Inspection and acceptance
7.1.1 Tubes shall be inspected by the supplier or a third party to ensure that the product quality
complies with the provisions of this Document and the requirements of the order form.
7.1.2 The purchaser may inspect the received products in accordance with the provisions of this
Document. If the inspection results are inconsistent with the provisions of this Document and
the requirements of the order form, it shall be submitted to the supplier in written, and the
purchaser and the supplier shall negotiate and resolve. Objections related to surface quality and
dimensions shall be raised within 1 month from the date of receipt of the product. Objections
related to other performance shall be raised within 3 months from the date of receipt of the
product. If arbitration is needed, it shall be determined by both the supplier and the purchaser
through joint sampling or negotiation on the supplier side.
7.2 Batching
Tubes shall be submitted for acceptance in batches. The weight of each batch of tubes shall not
exceed 5000kg.
7.3 Inspection
Product inspection items are divided into exit-factory inspection and type inspection, which
shall comply with the provisions of Table 7. When any of the following situations occurs, type
inspection shall be carried out:
a) Trial prototype identification of new products or old products transferred to other factories;
b) When there are major changes in the raw materials and processes of the product, which
may affect product performance;
c) After the product is discontinued, when production is resumed;
d) When the exit-factory inspection results are significantly different from the last type
inspection;
e) When type inspection has not been carried out for two consecutive years;
f) When required by the purchaser (specified in the order form);
g) When the national quality supervision agency requests type inspection.
8 Marking, Packaging, Transportation, Storage and
Accompanying Document
8.1 Marking
8.1.1 Product marking
Tubes that have passed the inspection shall have the following marks (or labels):
a) Product label;
b) Batch number;
c) Date of production;
d) Net weight;
e) Others.
8.1.2 Packaging marking
The marking of packaging box of tubes shall comply with the provisions of GB/T 8888.
8.2 Packaging, transportation and storage
8.2.1 The packaging, transportation and storage of tubes shall comply with the provisions of
GB/T 8888.
8.2.2 If there are special requirements for packaging methods, they shall be determined through
negotiation between the supplier and the purchaser.
8.3 Accompanying document
Each batch of products shall be accompanied by accompanying documents, which shall include
the following information, in addition to supplier information, product information, this
document number, exit-factory date or packaging date.
a) Product quality warranty, the contents are as follows:
1) The main performance and technical parameters of the product;
2) Product characteristics (including manufacturing process and raw material
characteristics);
3) Responsibility for product quality;
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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