Are there standards for internal threaded reducers?
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As the title suggests, are there any standards for internal threaded reducers? How should they be listed in the pipeline material table?
Standard national threaded pipe fittings include threaded reducers, but they are not called reducers; instead, they are referred to as hexagonal threaded connectors with internal and external threads
Is the notation NFC(E)50X25-sch80 20# for this eccentric reducer correct? Which is more commonly used for size changes in hex head threaded connections, the internal threads or the external threads?