DIN - K-value of Flange
Joshi
Dear Friends,
I attach here the Design calculation of flanges done by our consultant according to AD-Merkblatter. The flange rating is PN-40. The DIN Flange material is C22.8 DIN 17243 AD-W12/W13 , WERKSTOFF NUMBER IS 1.0460. According to Table of Material Equivalent Chart as reference , The equivalent material of this flange is A105N.
The client want us to confirm the validity of the K-value given in the calculation at the designated temperature. I don't have any reference cannot find the list of K-VALUE d list for the flange to check on its value. If using PVElite and ASME Sect VIII Div 1, For Flange of A105 , the design stress value at 100 Degree C. will be at 120 N/mm3. Can I use that and show it to the client?.
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Pieper QSI
Dear Joshi,
Please find below a part of table 6 of specification EN 10273 which replaces the mentioned DIN 17243 specification.
You can see that the “Werkstoff nummer” of the material P250GH is similar to the number of C22.8, both 1.0460 so this is the same material but only according to the new European standard, the DIN specification is withdrawn so I can’t find/give you a copy of that.
As you can see you can calculate with values up to 237 MPa at 100°C depending on material thickness.
I hope this will help you out.
Met vriendelijke groeten / Best Regards
Herman Pieper
Pieper Quality Support & Inspection
Phone: +31 (0)521 380083
Fax: +31 (0)84 7539225
Cell: +31 (0)6 51691215
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