GB/T 23609-2023 in English
VALIDSeamless copper alloy tube for water desalting applications
- Issued on:2023-08-06
- Implemented on:2024-03-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
《GB/T 23609-2023海水淡化装置用铜合金无缝管》由TC243（全国有色金属标准化技术委员会）归口，TC243SC2（全国有色金属标准化技术委员会重金属分会）执行，主管部门为中国有色金属工业协会。
Introduction
1. Background and significance of standard revision
GB/T 23609-2023 "Copper alloy seamless pipes for seawater desalination equipment" is a comprehensive revision of the original standard GB/T 23609-2009, which mainly optimizes and improves the technical development and application needs in the field of seawater desalination.
2. Comparison of standard frameworks
| Standard dimensions | Requirements of the 2009 edition | New requirements of the 2023 edition |
|---|---|---|
| Chemical composition | Conforms to the corresponding provisions of GB/T5231 | New grade BFe10-1.5-1 and its state |
| Allowable deviation of outer diameter | ±0.08mm | The deviation of some specifications is relaxed to ±0.23mm |
| Mechanical properties | Tensile strength not less than 340MPa | New tensile strength up to 480MPa |
3. Technical requirements interpretation
Chemical composition control
GB/T23609-2023 clearly requires that the chemical composition of pipes must comply with the provisions of GB/T5121, and adds the BFe10-1.5-1 grade and its state. This change is mainly aimed at the higher requirements of seawater desalination equipment for material corrosion resistance and mechanical properties.
Wall thickness tolerance
The wall thickness tolerance of the pipe is ±10% of the nominal wall thickness, accurate to 0.01mm. When the minimum wall thickness is required, the wall thickness of any part should not be less than the specified value.
4. Analysis of New Technical Requirements
- Electrochemical Corrosion Performance: A new requirement that the potential difference between the inner and outer surfaces ΔE should not be greater than 0.07V is added to ensure the corrosion resistance of the material in the seawater environment.
- Air Pressure Test Method: Two new test methods are added to ensure that there are no bubbles or changes in the internal pressure of the pipe.
- Residual Carbon Control: The residual carbon content on the inner surface is strictly controlled within 0.2mg/m² to avoid water pollution.
5. Implementation Suggestions
To ensure the effective implementation of the standard, it is recommended that:
- Both the supply and demand sides should strictly follow the standard requirements for production and inspection.
- Manufacturing enterprises need to strengthen the quality control of raw materials and semi-finished products.
- Users should clearly specify the test items when purchasing and keep relevant test reports.
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