Questions about flange holes
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For example, for a 4”-150# SO/FF flange, where can one find information regarding the hole diameter and the number of holes? Are there any regulations regarding this?
HG/T20615 or American standard B16.5
According to the standards, parameters such as pressure and diameter can be used to determine the pore size and number of pores
HG/T20592 includes European and American standards
HG/T20592 includes European and American standards
First, check the flange standard used, then find the corresponding pressure rating, and after that the dimensions – with that you’ll have all the information needed.
This post was last edited by canghaihezhuang on 2019-12-3 at 15:21. It’s a 4-inch flange with a pressure rating of 150 pounds; it’s of SO type, with FF face and waterline platform. As for the bolt holes, it depends on the applicable standards
There are standards. These are all standard product items.
US standards, EU standards, Chinese standards, chemical industry standards