Complaint
| Product introduction | ||||||||||||
| The cryogenic pipe is suitable for-45ºC ~-195ºC low-temperature pressure vessel pipeline and seamless steel pipe for low-temperature heat exchanger pipeline. | ||||||||||||
| Performance of cryogenic pipes; | 1. Ensure that it has good weldability; 2. Ensure the performance in the thickness direction; 3. Ensure sufficient impact toughness reserve and low ductile-brittle transition temperature at the service temperature; 4. Improve the safety of the structure. | |||||||||||
| Uses of cryogenic pipes: | Seamless steel pipe for low temperature pressure vessel pipeline and low temperature heat exchanger pipeline. | |||||||||||
| Standard | trademark | Chemical composition (%) | ||||||||||
| C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V | Al | ||
| GB/T18984 -2003 | 16MnDG | 0.12-0.20 | 0.20-0.55 | 1.20-1.60 | ≤0.025 | ≤0.025 | -- | -- | -- | -- | -- | -- |
| 10MnDG | ≤0.13 | 0.17-0.37 | ≤1.35 | ≤0.025 | ≤0.025 | -- | -- | -- | -- | ≤0.07 | -- | |
| 09DG | ≤0.12 | 0.17-0.37 | ≤0.95 | ≤0.025 | ≤0.025 | -- | -- | -- | -- | ≤0.07 | -- | |
| 09Mn2VDG | ≤0.12 | 0.17-0.37 | ≤1.85 | ≤0.025 | ≤0.025 | -- | -- | -- | -- | ≤0.12 | -- | |
| 06Ni3MoDG | ≤0.08 | 0.17-0.37 | ≤0.85 | ≤0.025 | ≤0.025 | -- | 2.5-3.7 | -- | 0.15-0.30 | ≤0.05 | -- | |
| ASTM A333 | Grade1 | ≤0.30 | -- | 0.40-1.06 | ≤0.025 | ≤0.025 | -- | -- | -- | -- | -- | -- |
| Grade3 | ≤0.19 | 0.18-0.37 | 0.31-0.64 | ≤0.025 | ≤0.025 | -- | 3.18-3.82 | -- | -- | -- | -- | |
| Grade4 | ≤0.12 | 0.18-0.37 | 0.50-1.05 | ≤0.025 | ≤0.025 | 0.44-1.01 | 0.47-0.98 | 0.40-0.75 | -- | -- | 0.04-0.30 | |
| Grade6 | ≤0.30 | ≥0.10 | 0.29-1.06 | ≤0.025 | ≤0.025 | -- | -- | -- | -- | -- | -- | |
| Grade7 | ≤0.19 | 0.13-0.32 | ≤0.90 | ≤0.025 | ≤0.025 | -- | 2.03-2.57 | -- | -- | -- | -- | |
| Grade8 | ≤0.13 | 0.13-0.32 | ≤0.90 | ≤0.025 | ≤0.025 | -- | 8.40-9.60 | -- | -- | -- | -- | |
| Grade9 | ≤0.20 | -- | 0.40-1.06 | ≤0.025 | ≤0.025 | -- | 1.60-2.24 | 0.75-1.25 | -- | -- | -- | |
| Grade10 | ≤0.20 | 0.10-0.35 | 1.15-1.50 | ≤0.030 | ≤0.015 | ≤0.15 | ≤0.25 | ≤0.015 | ≤0.50 | ≤0.12 | ≤0.06 | |
| Grade11 | ≤0.10 | ≤0.035 | ≤0.60 | ≤0.025 | ≤0.025 | ≤0.50 | 35.0-37.0 | -- | ≤0.50 | -- | -- | |
| Standard name | Standard number | Common brand (steel grade) |
| Seamless and welded nominal pipes for low temperature use | ASME SA -333M | Gr.3, Gr.6, Gr.8, etc. |
| Seamless steel pipe for low temperature pipeline | GB/T18984 | 16MnDG, 06Ni3MoDG, 06Ni9MoDG, etc. |
1. Who are we?
