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Q: How do you find flange class rating?
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What is the pressure rating for a Class 75 flange?

75 psig For pipe flanges the class rating is the pressure rating for the flange, in pounds per square inch - gauge (psig).


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Where do you find Protection Class Codes in Washington?

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What is a counter flange and how is it different from a normal flange?

The term"counter flange" is used in Europe to refer to a mating flange to make up a flange pair. For example a "counter flange" attached to a pipe must have the same bolt circle diameter, number of bolts, and size of bolts and pressure rating at the equipment nozzle flange provided by an equipment manufacturer.


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