改性沥青各种罐与管道用焊接材料选择的原则是：焊缝金属的性能应高于或等于母材性能。
The principle of choose on welding material of alter-asphalt in every kinds of tanks or tubes is: the character of welding seam metals should be higher than the original welding material.
另外采用系列加载试验对焊缝、母材的性能进行了研究。
In addition, series load experiments were used to study properties of weld and base metal.
容器的液压爆破试验证明，母材和焊接接头具有良好的综合力学性能。
The hydrostatic pressure explosion test on vessel indicates tha both base metal and weld metal have good comprehensive mechanical properties.
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