How to select integral steel pipe flanges IF per ASME B16.5 standard
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Hello everyone, a project client has specified the flange standard as ASME B16.5. For flanges with a diameter of less than or equal to DN50, it is required that the flange and the pipe be forged together as one unit. I checked HG/T 20615, and found that the integral steel pipe flange type IF can be used there, but this type of flange is not specified in ASME B16.5. So, what should be chosen in this case?
Overall, it’s built-in to the equipment; for example, the inlet and outlet flanges of the pump are cast directly
Well, but our project involves ordinary pressure pipeline flanges. According to chemical industry standards, integral steel flanges are available, such as those of the LWN and IF types; however, the customer requires flanges that comply with the ASME B16.5 standard, and no integral steel flanges can be found under that standard.
There is no issue with manufacturing this type of flange; the problem raised by the original poster relates to the applicability of standards. Does this count as a non-standard flange? Is it necessary for a design institute to create drawings for it? @The wise are enlightened @RedLee_ZZHI @great.wang @ylb913 @rjs999