Pipe connection arrangement for a heat exchanger

A heat exchanger comprising a pipe connection arrangement and a pipe connected by the pipe connection arrangement;

• wherein the pipe connection arrangement comprises:
• a metallic block fitting;
• a flange coupled to the block fitting;
• and
• a seal;
• wherein:
• the block fitting comprises a bore extending therethrough for receiving the pipe;
• the flange comprises a bore extending therethrough for receiving the pipe;
• the pipe extends through the bore of the flange and into the bore of the block fitting, and the bore of the block fitting is fluidically connected with an opening of the heat exchanger, such that fluid may pass through the pipe into or out of the heat exchanger;
• the block fitting comprises a surface that faces the flange;
• the pipe comprises an annular collar;
• the seal is located between the surface of the block fitting facing the flange and the annular collar of the pipe, wherein one side of the seal abuts the surface of the block fitting facing the flange and another side of the seal abuts the annular collar;
• and
• the seal comprises a metallic ring and an annular rim of electrically insulating material radially outward of the metallic ring.