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  1. RSB1968

    Fig 323.2.2B ASME B31.3 "Reduction in MDMT Curve"

    Question: Has anybody used this curve to get impact exemption below the MDMT of various grades of pipe? Note 3 on page 49 of B31.3 (99 edition)states "Impact testing is not required if the design MDMT is below -20° but above -155°F and the stress ratio defined in fig 323.2.2B does not...

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