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Tank Flanges are welded onto a hole on the flat surface of a tank, creating a connection for a threaded pipe. Five different Tank Flanges.
  • All Tank Flanges sold here are forged steel, conforming to ASTM A105 and ASME SA105.
  • Tank Flanges are stocked in sizes from 1/4" to 4".
  • For a Tank Flange, size refers to the nominal diameter of the connected pipe.
Two Tank Flanges in different sizes.

To start, select size. Follow the green box to refine selections as desired. Click “Lookup Product” any time after selecting size to display products matching criteria entered so far. Fields autofill when only one choice. Or use search box above.


Schedule refers to the pipe thickness on which this fitting is to be used, typically values are STD (standard), S/10 (Schedule 10) and XH (extra heavy). These thickness vary with the diameter of the pipe according to published standards.


Domestic = Made in the USA

Import = Made anywhere else


Flanges are avaiable in aluminum, carbon steel and stainless steel in grades 304, 304L, 316 and 316L. The L designates "low carbon", making the fitting good for welding.