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When utilizing ASME B31.1 or B31.3 in addition to Section IX, there PW S9 will be utilizing the latest version of B31.1 or B31.3 with the newest version of Section IX code.

  • Section IX 2021 Code will use the 2020 B31.1 and B31.3 Code.

  • Section IX 2019 Code will use the 2018 B31.1 and B31.3 Code