What is the flange standard that is normally used? PN16, ASTM A53, A106, what are the difference?

Question

I am confused! Somebody please help? Dimension for standard flanges only reach up to 24". What about for flanges for 40"? Have to use other standard like PN standard?

Answer 1

*For any pipe or pipe fitting have two standards:

Material standard.

Dimensional standard.

*ASTM A 106 ,ASTM A53 is a Material standard.

*PN 16 is a pressure rating of the flange and dimensions of the flange will vary according to pressure rating of the flange.

Standard for PN16 :

BS EN 1092-1 PN16

*For more than 40 inches,pl.click on:

http://www.engineeringtoolbox.com/carbon...

http://www.roymech.co.uk/Useful_Tables/F...

http://www.engineeringtoolbox.com/flange...