The document specifies sizes, tolerances and requirements of glasstubes with laboratory flat flange and of covers with laboratory flat flange. The flat flanges may be equipped with an additional groove for an O-ring. These standardized glass tube ends are used in chemical laboratories and in pilot plants.#,,#
DIN 12214:1996 history
1996DIN 12214:1996-12 Laboratory glassware - Glass tube ends and covers with laboratory flat flange - Dimensions, requirements
1996DIN 12214:1996 Laboratory glassware - Glass tube ends and covers with laboratory flat flange - Dimensions, requirements