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在UG-36中的required minimum thickness 是不包括腐蚀裕量的,这与我们国标的说法是不一致的。
welded, brazed, and flued connections meeting the applicable rules and with a finished opening not
larger than:
(-1) 31/2 in. (89 mm) diameter—in vessel shells
or heads with a required minimum thickness of 3/8 in.
(10 mm) or less;
(-2) 23/8 in. (60 mm) diameter—in vessel shells
or heads over a required minimum thickness of 3/8 in.
(10 mm);
在UG-16(e)中也提到了,VIII-1卷中的要求厚度都是不包括腐蚀裕量的。
(e) Corrosion Allowance in Design Formulas. The dimensional
symbols used in all design formulas throughout this
Division represent dimensions in the corroded condition.
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