Heat and cold insulation for the Jad exchanger made of rigid polyurethane foam in the form of slate. The lagging has a cylindrical shape corresponding to the geometry of the insulated surface. Complete isolation of the pipeline section is made of two half-shells with longitudinal and frontal locks, which, when folded, eliminate gaps, facilitate assembly and can be assembled and disassembled repeatedly using tapes and clips. Price for products up to +150 C on individual request.