Set of flanges; an installation comprising a set of flanges and a method of providing the installation

A set of flanges comprising a first annular flange having a first front side and a second annular flange having a second front side, wherein said first annular flange and said second annular flange each comprises a plurality of through holes along their respective annular extension, wherein said plurality of through holes of the first annular flange corresponds with said plurality of through holes of the second annular flange to provide that said first annular flange and said second annular flange are adapted for being assembled with the first front side facing the second front side of said respective first annular flange and second annular flange,

• wherein said first front side of said first annular flange comprises an annular toe surface section and an annular intermediate region comprising an annular beveled surface section located radially inwards to the annular toe surface section and radially outwards to said through holes, wherein said first front side further comprises an annular flat surface section located radially inwards to the annular intermediate region and comprising an annular heel surface section located radially inwards to said through holes,
• wherein said second front side of said second annular flange comprises an annular heel surface section and an annular intermediate region comprising an annular beveled surface section located radially outwards to the annular heel surface section and radially inwards to said through holes, wherein said second front side further comprises an annular flat surface section located outwards to the annular intermediate region and comprising an annular toe surface section located radially outwards to said through holes,
• wherein said annular toe surface section of said first front side is adapted to provide a contact surface with said annular toe surface section of said second front side and wherein said annular heel surface section of said first front surface is adapted to provide a contact surface with said annular heel surface section of said second front side,
• wherein said annular beveled surface section of said first annular flange is sloping downwards from said annular toe surface section of said first annular flange to said annular intermediate surface section of said first annular flange through which the through holes of the first annular flange are passing with an angle α1, and
• wherein said annular beveled surface section of said second annular flange is sloping downwards from said annular heel surface section of said second annular flange to an annular intermediate surface section of said second annular flange through which the through holes of the second annular flange are passing with an angle α2, wherein the angle α1 and the angle α2 independently of each other is from more than 90° to less than 180°.