GB/T 26291-2020 in English
VALIDSeamless copper-nickel alloys tube for ships
- Issued on:2020-09-29
- Implemented on:2021-08-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
《GB/T 26291-2020舰船用铜镍合金无缝管》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
Core changes in the standard revision
| Technical parameters | 2010 version | 2020 version | Range of change |
|---|---|---|---|
| Outer diameter range (mm) | 8-458 | 4-458 | Lower limit expanded by 100% |
| Wall thickness range (mm) | 0.6-12.0 | 0.4-12.7 | Range expanded by 21.7% |
| Maximum length (m) | 8 | 15 | Increase by 87.5% |
Key performance indicators
Material mechanical requirements
BFe10-1-1 alloy in soft annealing (O60) state:
- Tensile strength ≥290MPa
- Elongation after fracture ≥35%
- Vickers hardness 75-100HV
The newly added BFe30-1-1 alloy is required to have a hardness of 100-140HV, which significantly improves its resistance to seawater corrosion.
Technical Innovation Points
Electrochemical Corrosion Control
New Appendix A specifies the potential difference detection method, requiring the internal and external surface potential difference ≤0.07V, through:
- 0.02mol/L KCl solution simulates the marine environment
- Two-electrode method to measure the potential difference
- Surface treatment process standardization
Implementation and application suggestions
Selection considerations
| Application scenarios | Recommended grades | Special requirements |
|---|---|---|
| High-pressure piping system | BFe30-1-1 | Hydraulic pressure test is required |
| Complex curved pipelines | BFe10-1-1 | Preferably choose coils |
It is recommended to specify the following non-mandatory terms when purchasing: eddy current flaw detection grade, grain size detection requirements, etc.
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 26311-2024 in English
Rod, bar and wire of recycling copper and copper alloy
2024-09-29 -
GB/T 1527-2017 in English
Drawn tube of copper and copper alloys
2017-07-12 -
GB/T 42512-2023 in English
Copper alloy seamless coil tube for sheath
2023-05-23 -
GB/T 8890-2015 in English
Seamless copper alloy tube for condenser and heat-exchanger
2015-09-11 -
GB/T 36161-2018 in English
Antifriction brass rod and bar
2018-05-14 -
GB/T 2529-2012 in English
Copper sheets and bars for electrical conduction purpose
2012-12-31 -
GB/T 5187-2021 in English
Liquid chlorine for industrial use
2021-08-20 -
GB/T 17791-2017 in English
Seamless copper and copper alloys tube forair conditioner and refrigeration equipment
2017-07-12
