Can the fastener standards NB/T 47027 and HG/T 20634 be used as substitutes for each other?
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On the equipment diagram, it can be seen that standards such as those for flanges are HG, but NB/T is used for fasteners. In my opinion, when choosing a standard system, it’s best to stick to one series; there should not be multiple standard systems used simultaneously. For example, European and American standards should not be mixed together, to avoid complications when replacing components. Even if they are mutually compatible, don’t express it that way. Moreover, can these two standards be used interchangeably?
When putting forward design requirements, mention them to him
Can equipment flanges and pipe flanges be used interchangeably? Although they are both called flanges, their importance differs; therefore, the studs used are in accordance with their respective standards……
For the same device, or devices belonging to the same project, generally one of the European or American standards is chosen... To be precise, the shape of the studs on flanges of devices with the same specifications is more or less similar; if material differences are not taken into account, it’s possible to use them interchangeably without any problems. Of course, this is not correct
Different systems. The device itself cannot be used universally; as for the flange bolts at the connection points between the device and the pipes, these depend on the design specifications
Different design methods and models cannot be swapped