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galal_elden
Associate

Join Date: Jan 2010
Location: pipe line project - KSA ( welding inspector - CSWIP 3.1)
Posts: 36

Different between ANSI and DIN in flanges

01/17/2010 6:03 AM

hi every body i have a big problem in my work and i think it will be solved by your helping,

i want from any one to tell me what is the different between flange according to ANSI B16.5 and Din 2636

because the dimension in the ANSI B16.5 class 400 ( PN68) says the thickness of the flange is 12.7 mm and the DIN 3636 (relating pressure 64) says the thickness of the flange is 7.1 mm ,if the ANSI B16.5 class 400 ( PN68) is equal to DIN 3636 (relating pressure 64) so why there is diferent in the thickness and if not equal, what is the relation between them.

thanks so much
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Anonymous Poster
#1

Re: Different between ANSI and DIN in flanges

01/17/2010 7:27 AM

What is the DN ?

For say 1" (DN=25) flange, b=24, f=2 so thickness= 22

For 1" Flange ANSI= 0.69" = 17.2mm
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galal_elden
Associate

Join Date: Jan 2010
Location: pipe line project - KSA ( welding inspector - CSWIP 3.1)
Posts: 36
#2
In reply to #1

Re: Different between ANSI and DIN in flanges

01/17/2010 10:51 AM

i mean the din (Deutsches Institut für Normung) not the DN.

thanks
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galal_elden
Associate

Join Date: Jan 2010
Location: pipe line project - KSA ( welding inspector - CSWIP 3.1)
Posts: 36
#3

Re: Different between ANSI and DIN in flanges

01/17/2010 10:54 AM

i mean DIN Deutsches Institut für Normung not Dn .

thanks
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Anonymous Poster
#4
In reply to #3

Re: Different between ANSI and DIN in flanges

01/18/2010 9:21 AM

DN= nominal diameter eg DN25 .. (or NB if you want) But as I have given in above, there is not that much different, and the DIN is supposed to be a bit more conservative.
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