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ASME B16.1—1998 CAST IRON PIPE FLANGES AND FLANGED FITTINGS Classes 25,125,and250
    The 1998 edition of this  Standard  is  being  issued with an  automatic  addenda subscription  service. The use  of addenda allows revisions  made  in response to  public review comments  or committee actions  to  be  published  on  a  regular yearly basis;  revisions  published  in  addenda will  become effective 6  months after the Date of Issuance  of the  addenda.  The next edition  of this  Standard is scheduled for  publication in 2003. 
    ASME issues  written  replies to  inquiries  concerning  interpretations  of technical  aspects  of this  Standard.  The interpretations will  be included with the  above  addenda  service.