A brief history of flat flanges

A simple component like flat flanges, yet at the same time a versatile one

Since the beginning of the industrial revolution, the need was there to link the pipes with one another and ensure an easy demountability, as well as a similarly easy maintenance; whence the birth of bolted joints through flat flanges, which have become paramount in the field of conducting liquids into the industrial systems.
Beginning with the forging process, the peculiarity of which is a better homogenization of the material compared to micro-fusions, and thus better mechanical characteristics, flat flanges are realized by working through machine tools the previously obtained rough material: turning as regards the realization of flat contact surfaces and phonometric rifling, which facilitates the grip of the gaskets, numerical control drilling machines as regards the preparation of bolt holes.
The flat flanges are realized according to the EN1092 standard, and they might be supplied both in stainless steel and in carbon steel, duly marked as demanded by the reference standard. The sizes reach DN-1000 as regards the endurance classes up to PN16, while they reach DN-400 as regards the highest endurance class, PN40
All the flat flanges marketed by INTERTUBI are marked in accordance with what is prescribed by the reference standard, and are escorted by the EN10204/3.1 certificate as guarantee of the quality and origin of the material.