| 摘要 |
<p>The invention relates to a pressure vessel having an external wall, lined internally with a liner, a vessel proper and at least one drain, and more specifically to a new construction of the drain, which e.g. enables the internal vessel to move slightly in relation to the main wall and its liner, in all directions. Should the drain fracture nevertheless, construction prevents any major escape of gas or liquid. This has been accomplished by extending the vessel and the liner in the form of coaxial internal and external tubes respectively, the double tube thus formed comprising first and second straight sections substantially at right angles to each other, or alternatively only comprising a second straight section, and the double tube forming a single tube beyond the second straight section of the internal tube.</p> |
