Connecting pipe assembly and heat exchanger

A heat exchanger, comprising:

• a first tubular member extending in a first direction, wherein the first tubular member has a first opening passing through a first tube wall of the first tubular member;
• a second tubular member disposed side by side with the first tubular member, wherein the second tubular member has a second opening passing through a second tubular wall of the second tubular member, and
• a connecting pipe assembly comprising:
• a pipe;
• a first flange and a second flange, each flange extending towards a radial outside from an outer peripheral surface of the pipe, wherein:
• the pipe comprises a first insertion pipe section on one side of the first flange in an axial direction of the pipe and a second insertion pipe section on one side of the second flange in the axial direction of the pipe,
• the first insertion pipe section is inserted in the first opening formed in the first tube wall of the first tubular member, and a first surface of the first flange facing the first tubular member is connected with a first outer peripheral surface of the first tube wall of the first tubular member,
• the second insertion pipe section is inserted in the second opening formed in the second tube wall of the second tubular member, and a second surface of the second flange facing the second tubular member is connected with a second outer peripheral surface of the second tube wall of the second tubular member, so that the first tubular member is in fluid communication with the second tubular member through the pipe of the connecting pipe assembly,
• at least a portion of a first end face of the first insertion pipe section exceeds the corresponding portion of the first inner peripheral surface of the first tube wall of the first tubular member surrounding the first opening, in a radial direction of the first tubular member, and
• at least a portion of a second end face of the second insertion pipe section exceeds the corresponding portion of the second inner peripheral surface of the second tube wall of the second tubular member surrounding the second opening, in a radial direction of the second tubular member.