Flange for heating of platinum passage

The utility model discloses a flange for heating of a platinum passage. The flange comprises a flange inner ring (1) and a flange outer ring (2) which are concentrically arranged, wherein the flange outer ring (2) is connected to the outside of the flange inner ring (1); the flange outer ring (2) is provided with a plurality of expansion adsorption holes (21); the flange outer ring (2) is provided with a flange handle (3); the flange handle (3) is provided with a current dividing hole (31); a cooling water pipe (4) is arranged along the outer sides of both the flange outer ring (2) and the flange handle (3); and the outer side of the cooling water pipe (4) is provided with a current equalizing conducting ring (5). According to the flange for heating of the platinum passage, which is provided by the utility model, the expansion adsorption holes are formed on the flange outer ring, so that the problem of expansion in the process of heating the flange is solved; and by arranging the conducting ring on the outer