试压失败的案例？ 不可能是pvc材料，从图片可清楚的看到焊缝，我在摘了第一个图片的文字叙述，压力上升到测试压力的50％时就爆裂了。应该就是劣质母材引起的，钢材是国产的，但容器的使用者是外国厂家，第一个图片其实是一封信，可以看出写信人对我国的钢材非常失望，我们应该努力提高国产钢材的质量，才能提高我们的信誉。 [pressure vessel failure during hydrotest-nov. 2007 in china january 9, 2008 thomas eun folks, please find attached photos of a pressure vessel that recently failed whilst under hydrotest during post fabrication testing. this vessel was manufactured by a vessel vendor in china and the plate was of chinese mill origin. unfortunately this is another example of serious equipment/material failures with equipment being sourced out of the rapidly developing economies such as china, eastern bloc and others. these examples are becoming almost a weekly occurrence now and are exhibiting failure modes not seen in the mature manufacturing economies since the 1930's. again we need to ensure vigilance in the acceptance of manufacturers and once more i stress the need to know where the base materials are sourced from. apparently this pressure vessel had reached fifty percent of the required test pressure when the shell ruptured. a metallurgical failure report is not available however from the photographs a number of observations could be made regarding the quality of the material and the welding. lesson learned (1) all base metal requirements shall be specified in p.o requisition per project/industry code requirements. (2) consult specialists (i.e., materials and corrosion engineers) whenever you doubt. (3) all inspection (from base materials to final products) should be performed per the codes, specs & standards. (4) especially when you selected the manufacturers in china, the above (1), (2) & (3) will be a very important message. ]查看更多
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