flange American standard number

There are many differences in flange size and standards used by American Standard Valves and National Standard Valves. 

The following describes the standard and structural standards for flange sizes of ball valves in American Standard Valves. Details are as follows:

1.The general flange size in American standard valves is in accordance with American standard ASME B16.5 (24" and below)

2.Large diameter flange size according to American standard ASME B16.47 series A & B

3.The length of the structure is designed according to the American standard ASME B16.10.

4.Mainly adopt the American standard ASME B16.5 

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