GB/T 24512.2-2009 in English
VALIDSeamless steel tubes and pipes for nuclear power plant―Part 2:Alloy steel seamless tubes and pipes
- Issued on:2009-10-30
- Implemented on:2010-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
| Standard No: | GB/T 24512.2-2009 |
| Document status: | VALID |
| Title in English: | Seamless steel tubes and pipes for nuclear power plant―Part 2:Alloy steel seamless tubes and pipes |
| Title in Chinese: | 核电站用无缝钢管 第2部分：合金钢无缝钢管 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2009-10-30 |
| Implemented on: | 2010-06-01 |
| ICS Classification: | 77.140.75-Steels pipes and tubes for specific use |
| Chinese Classification: | H48-Steel tube and cast iron pipe |
| Professional Classification: | GB-National Standard |
| Related Keywords: | seamless steel tubes
alloy steel seamless tubes process control steel pipe manufacturing nuclear power plant ― part pipes introduction analysis |
| Related Topics: | Titanium seamless steel pipe
seamless steel pipe GB/T 24512.2 GB/T 24512.2-2009 steel tube curvature Ruijin Nuclear Power Plant Low alloy steel pipes for nuclear power plants |
Introduction
Analysis of core technical requirements
| Performance indicators | HD12Cr2Mo | HD15Ni1MnMoNbCu |
|---|---|---|
| Tensile strength (MPa) | 450-600 | 620-780 |
| High temperature strength (400℃) | ≥185MPa | ≥343MPa |
| Impact energy (-20℃) | Not required | ≥40J (transverse) |
Key manufacturing process control
Steel pipe manufacturing must meet the triple smelting guarantees: electric arc furnace/converter + refining outside the furnace + vacuum treatment, with a total elongation coefficient ≥3. Heat treatment system requirements:
- HD12Cr2Mo: normalizing (900-960℃) + tempering (700-750℃)
- HD15Ni1MnMoNbCu: quenching (880-930℃) + tempering (630-680℃)
International standard benchmarking analysis
This standard is mainly formulated with reference to EN10216-2 and ASME specifications, and the corresponding relationship between grades is:
| National standard grade | ASME corresponding grade | Key differences |
|---|---|---|
| HD12Cr2Mo | SA-213 T22 | Carbon content upper limit increased by 0.01% |
| HD15Ni1MnMoNbCu | No direct counterpart | Unique Ni-Cu-Nb composite strengthening system |
Implementation and application suggestions
- Dimensional accuracy selection: It is recommended to use PC-level high-level accuracy (outer diameter tolerance ±0.75%D) for conventional island pipelines of the nuclear island
- Non-destructive testing combination: Ultrasonic flaw detection (L2 level) + eddy current flaw detection (B level) double guarantee
- Special working condition processing: High-temperature service pipelines should be supplemented with stress corrosion cracking (SCC) test
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