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发表于 2013-12-25 12:43:29
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是要考虑的,但是UG16-C不是这样理解的。在UG16-C如下:
Plate material shall be ordered
not thinner than the design thickness. Vessels made of
plate furnished with an undertolerance of not more than
the smaller value of 0.01 in. (0.25 mm) or 6% of the ordered
thickness may be used at the full design pressure
for the thickness ordered. If the specification to which
the plate is ordered allows a greater undertolerance, the
ordered thickness of the materials shall be sufficiently
greater than the design thickness so that the thickness of
the material furnished is not more than the smaller of
0.01 in. (0.25 mm) or 6% under the design thickness.
即如果板材的负偏差不大于0.25mm或者6%计算厚度的较少值,则可以使用板材全厚度设计(不推荐使用),板材的负偏差是可以超过0.25mm和6%的计算厚度的较小值的。超过的时候在计算时是要减去的。如在IIA UG 20中规定了SA516的板材负偏差,在计算时是要减去此负偏差的 |
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Es前缘
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帮助他人解决问题,新时期的活雷锋! |
壞壞小少爺
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兄台高见,英雄所见略同 |
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