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ガラス板式液面計の最低圧力等級

2020-07-11View Original

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SHT 3005-2016石油化学工業用自動化計装機器の選定設計規格の8.1.2項、ガラス管式液面計の選定に関する記述には、b)反射型の場合は最低でPN100@315℃、透過型の場合は最低でPN50@315℃でなければならないとあります。この圧力等級の表し方がよく理解できませんし、PN100という数値も少し大きすぎるように思えます。どなたかこの状況をご存知の方、教えていただけませんか

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