The NH25-35GR long-life alloy redefines the performance limits of reformer tubes. Its exceptional high-temperature strength not only equips equipment with the rugged endurance to withstand 1100 °C, but also revolutionizes design—by optimizing wall thickness it enables highly efficient heat transfer and fuel savings. Ultimately, on the same platform, it boosts your operating temperature by 15 °C, unlocking higher throughput and delivering a double leap in both efficiency and output.
Excellent stress fracture strength and creep resistance
Good organizational stability, oxidation resistance, and carburizing resistance
The wall thickness of the furnace tube has decreased by 18%, and the operating temperature has increased by 15℃
Improve thermal efficiency and increase production capacity
Calculate the wall thickness of furnace tubes based on API 530 standard
The design conditions are: a lifespan of 100000 hours, a pressure of 3 MPa, a temperature of 1000 ℃, and an inner diameter of 100 mm. The calculation results are shown in the table, and the minimum wall thickness of NH25-35GR is 12.4 mm, which is about 18% lower than the traditional material's 14.7 mm. The corresponding reduction in outer diameter helps to reduce equipment weight and improve thermal efficiency.
In addition, the allowable operating temperature of NH25-35GR can be increased to 1100 ℃, which is 15 ℃ higher than traditional materials. This feature not only extends the lifespan of the furnace tube, but also helps to improve production capacity and reduce energy consumption.
Parameters | Values | |
Design Life | 100000 Hour | |
Design Pressure | 3MPa | |
Design Temperature | 1000℃ | |
Reformer Tube ID | 100mm | |
Material | NH25-35GR | NH25-35 Micro-Alloy |
Allowable Stress | 13.6MPa | 11.7MPa |
Per API 530 | MSW = (P x ID) / (2 x Sr –P) | |
Calculated Minimum Wall | 12.4mm | 14.7mm |
OD ID+2MSW+1.6 outer surface roughness layer | 126.4mm | 131mm |
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