Flanges and Pipe Standard

Hi, knr_karthik

What you have are DIN Standard designations (Now EuroNorm too). Surely you Know the ANSI type designation: NPS (nominal pipe size in inches) and Class (300, 900, 1500, etc) which gives you thickness according to the pressure/temperature rating.

European standards designation is trough DN (nominal diameter in mm) and PN (nominal pressure in bars).

You can google "DIN flanges/piping)" and look for any flange/pipe manufacturer. Most of them have tables with dimensions for all flange types (welding neck, slip-on, etc).

Anyway here you have a link: http://mdmetric.com/ss/flanges/flenzen_din_&_ansi.htm

Note: In the link you can see NW (nennWeite) instead of DN. Don't worry is the same but in german language.

Hai,

i got it thanks for your info

WELL I WAS GOING THROUGH DIN STD. THE MOST IMPORTANT THING SCH.OF PIPE THICKNESS, I COULD NOT FIND, DOES ND STAND FOR SCHEDULE OF PIPES, I CHECKED DIFFERENT ND LIKE ND 16 ND 40 IN BOTH S WHICH IS WALL THICKNESS IS THE SAME,FOR EXAMPLE 40 MM FLANGE, ND 16 AND ND 40 HAVE SAME WALL 2.6 MM,HOW COME IS IS POSSIBLE.

I HAVE TO CONVERT ASTM/ANSI SPECS FOR PIPES AND FLANGES TO DIN, I DONT KNOW HOW TO DO, WITH OUT SCH.RATING OD OF THE PIPES ARE SAME,BUT WALL THKNESS WILL DECIDE THE PRESSURE RATING.

CAN ANYBODY HELP.

RASHEED KHAN

DN means Nominal Pipe Size, NPS : e.g. DN 15 = NPS 1/2", DN 20 = NPS 3/4", DN 30 = NPS 1-1/4", ... etc.

PN denotes to DIN standard specification number related to flange dimensions (rating or class): e.g. PN 6 = DIN 2631, PN 10 = DIN 2632, PN 16 = DIN 2633, PN 40 = DIN 2635, ... etc.

THANKS FOR THE INFO. AND COULD YOU SHOW ME SOME INFORMATION ABOUT DIN STANDARD PIPE I MEAN THE SIZE, THICKNESS, PRESSURE CLASS AND SOMETHING.

You are welcome, Please send your e-mail.

Please refer to the following site provided by Kwetz in thread Difference between DIN2501 and ANSI B16.5 fittings :

http://mdmetric.com/tech/2501sum.pdf

In addition to the following sites provided by me:

1. ASME B16.5 Flanges