| 摘要 |
In a heat-exchanger comprising a plurality of helically wound pipe elements stacked on top of each other and having their ends connected to risers all the risers are located inside the jacket of the heat-exchanger but radially outside the stack and within the same half of the circumference thereof. The design makes all the connections of the elements readily accessible and permits convenient demounting and remounting of individual elements by lateral extraction of a faulty element from the stack and re-insertion of it upon repair work. The stack is preferably composed by two or more sections any such section being provided with its own risers.
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