High-pressure flange design
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For DN1400 with a design pressure of 25 MPa, what standard should be referred to for designing the equipment flanges? Please help me out
The design of high-pressure flanges typically follows the ASME B16.5 or ASME B16.47 standards; ASME B16.5 is applicable to flanges with sizes ranging from NPS 1/2 to NPS 24, while ASME B16.47 is used for large-diameter flanges with sizes of NPS 26 and above. Since you mentioned DN1400, which is beyond the scope of ASME B16.5, it is advisable to consider using the ASME B16.47 standard. Furthermore, considering that the design pressure is 25 MPa, which is quite high, special design and material selection may be required to ensure pressure resistance and sealing performance. In addition, GB/T 9112-2010 may also be applicable to the conditions in China. When designing specifically, factors such as operating temperature, flange type (blind flange, necked flange, etc.), seal surface type, and material grade should also be considered. .
Twin-cone seal/gasketless seal – it depends on the medium and temperature
For DN1400 with a design pressure of 25 MPa, no flanges are needed
Based on GB150 standards, the thickness is roughly around 400 mm. This is a quote; it’s difficult to select suitable materials, and the processing is challenging, so we decide not to proceed with it