Stainless flanges

International Equivalent

Mark Analogue W. Nr. Aisi Uns En Order
03Х18Н11 1.4306 304L X2CrNi19-11 Delivery from the stock, in stock
04Х18Н10 EI842 1.4307 304L X2CrNi18-9 Delivery from the stock, in stock
12X18H10T EP2 1.4541 321 X12CrNiTi18-10 Delivery from the stock, in stock


Stainless steel flanges are used in the pipeline to seal pipe joints, as well as connections to pipe fittings. Flanges are connected by bolts (or studs), nuts, or welding.


Today the range of flanges is almost unlimited. There are many domestic manufacturers. But as far as foreign pipe-line valves in a number of branches are more and more in demand the market offers the choice of import steel flanges (according to DIN (ISO) 304 AISI) in a range of sections (DN 15 - DN 150) working with pressure 10 - 16 atm.

Percentages Composition of 304 L

AISI C Cr Fe Ni V Mn P S Si Impurities
304 L ≤0,03 18-20 Os. 8-12 --- ≤2 ≤0,045 ≤0,03 ≤1 ≤0,15

On stainless steel flanges standardized GOST and DIN (ISO) part of the center distance for bolts are different, so be careful when buying.


Stainless flanges are divided by section, working pressure, shape of sealing surface, etc. According to the method of mounting there are collar flanges (welded butt) - GOST 12 821-80 and flat - GOST 12 820-80. Flat flanges (GOST 12 820-80) have the range of cross-sections DN 10 - 1600, working pressure PU 1-250 atm. The most frequent execution is 1 (with connection protrusion). Flanges made of steel 12X18H10T are used from -40 ° C to +300 ° C.

Chemical composition of 08Cr18Ni10T alloy

Fe Cr C Mn S P Ni Ti Si
Basic. 17 to 19 ≤0,08 ≤2 ≤0,02 ≤0,035 From 9 to 11 5-С-0,7 ≤0,8
Steel C Cr Fe Ni Ti Mn P S Si Impurities
12CR18NI10T ≤0,12 17-18 Osn. 9-10 ≤0,8 ≤2 ≤0,03 ≤0,02 ≤0,8 ≤0,15

Collar flanges (GOST 12 821-80) are equipped with a conical protrusion for welding to the pipe. This flange received its name after the form of connection with the end of the pipe as a collar. Collar flanges have a larger number of gaskets (versions 1-9). Design 1, which is typical for flat flanges, can be used in collar flanges up to pressure Ru 250 atm.


Evek GmbH stocks a wide range of pipe fittings, in particular stainless steel flanges at an optimum price. Technical documentation includes data on product performance. With us it is easy to buy in bulk any semi-finished products for large-scale production. We also cooperate with retail buyers. The high level of service, compliance with GOST and international quality standards, responsiveness of service is the face of our company.

Buy at the best price

Provide an unlimited range of high quality flanges of any size of domestic and import manufacturers. If you have difficulty in choosing, at your service experienced managers who are always in touch and ready to provide advice. Ordering from us you receive certified products conforming to international quality standards in the shortest possible time. If you value your time, contact our nearest office today, or order online.