其中PT為試驗壓力,MPa;P為設(shè)計壓力(對在用壓力容器一般為最高工作壓力或壓力容器銘牌上規(guī)定的最大允許壓力),MPa;[σ]為球殼材料在試驗溫度下的許用應(yīng)力,MPa;[σ]t為為球殼材料在設(shè)計溫度下的許用應(yīng)力,MPa;η為試驗壓力系數(shù),按下表選擇: |
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