Patent ID: 6896042

Claim:
A pipe plate unit for a heat exchanger to be provided between a pair of water jackets, comprising: a pair of pipe plates; a plurality of heat conducting pipes, the heat conducting pipes being arranged to each other and perpendicular to the pipe plates and fixed by welding to the pipe plates to be constructed as an assembly unit so that a plurality of the assembly units can be vertically arranged between the pair of water jackets to be attached to the pair of water jackets by the pair of pipe plates; and a plurality of support plates perpendicularly attached to said plurality of heat conducting pipes at several lengthwise locations, wherein each said pipe plate comprises a clad steel plate which comprises a steel plate and a faceplate cladding of titanium plate bordering a fluid chamber, a connecting plate at a connection area of said assembly units is provided on a side opposite a faceplate cladding side, and said connecting plate connects adjacent assembly units by bolts.