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asadnoor
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Join Date: Aug 2010
Posts: 6

Flange Question

09/02/2010 7:24 AM

a ball value dn=25 pn=60 whats pipe size and whats means of PN ,DN
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Anonymous Poster
#1

Re: Flange Question

09/02/2010 8:38 AM

dn= nominal diameter (mm)

pn = pressure number

But they are not exact - dn25 does not mean the diameter is exactly 25 (it is actually OD=33.4) the thickness will depend on the PN
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gianmt
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Join Date: Sep 2010
Location: Italy
Posts: 1
#2
In reply to #1

Re: Flange Question

09/08/2010 8:17 AM

The thickness does not fully depend on the PN, it will match the pipe wall thickness.
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