The invention relates to a connection part for connecting a first pipe (1) and a second pipe (2) together for forming a pile, wherein the connection part is to be arranged between the first pipe (1) and the second pipe (2) for forming a connection between said first and second pipes (1,2), wherein said connection part comprises at least one double cone (10,20) comprising a first cone (11,21), a second cone (12,22) and a friction surface (13,23) which is a cylindrical zone arranged between said first cone (11) and said second cone (12) for forming a friction joint between the double cone (10) and the first and/or second pipe (1,2).