Is 16MnDR suitable for pressure vessels designed for a temperature of -45°?
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I would like to ask whether 16MnDR is suitable for pressure vessels designed for a temperature of -45° Without considering medium corrosion, all materials specified in GB3531 are resistant to corrosion. The design pressure is 1.45 MpaG and the equipment diameter is DN800 – which material would be more suitable?
According to the regulations, 16MnDR steel plates are suitable for the manufacture of low-temperature pressure vessels. However, in a low-temperature environment of -45°C, both the toughness and strength of 16MnDR steel may be affected. Therefore, detailed material property testing and analysis are required to ensure that it meets relevant standards and design requirements. After considering the materials, based on the equipment diameter of DN800 and a design pressure of 1.45 MpaG, welded carbon steel pipes or seamless steel pipes can be considered for use. The specific material to be chosen should be determined through analysis and comparison based on actual conditions, including factors such as cost, weldability, mechanical properties, and corrosion resistance. At the same time, it is also necessary to take into account the site conditions and operational requirements, as well as safety and cost-effectiveness. .
The design temperature is lower than the lower limit of the service temperature for this material.
Firstly, 16MnDR cannot be used; according to Table 4 of GB150.2-2011, the minimum operating temperature is -40 degrees Celsius. The diameter is not large either, and the pressure is not very high, so S30408 can be used.
07MnNiMoDR is commonly used for propylene spheres, with a minimum operating temperature of -50°C.
According to the specifications for fixed-pressure vessels GB150, it cannot be used. 09MnNiDR can be used.
Both 09MnNiDR and 07MnNiMoDR can meet the requirements at -45 degrees. :lol
It is necessary to meet the design specifications while also taking into account the cost of investment.
According to GB/T150.2, it indeed cannot be used. By the way, I would like to ask the experts: under which standard is the operating temperature range for stainless steel materials specified?