| 摘要 |
The multiple metal layers in adjacent positions are superimposed and welded together giving a pressurised enclosure having narrow spaces between the layers. A flowable heat-conductive material, having a thermal conductivity exceeding a predetermined value, is introduced into the spaces between the layers to substantially fill the spaces. The filling operation is carried out above the m.pt. of the heat conductive material and the spaces between layers may be evacuated to below 5 psi. Hydrogen, which can permeate through the layers and attack the metal, is vented from the space between the innermost metal layer and the adjacent layer. The heat conductive material in the spaces between layers of the vessel wall increases the heat conduction transversely through the multiple-layer vessel wall. This reduces any maldistribution of metal stress whilst the vessel is being used at high pressures and temps. (Provisional basic previously advised in Week 8406). |
