Section 408.4222. Safety valve setting on boilers with direct feed.  


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  • In those cases where the boiler is  supplied  with   feedwater directly from water mains without the use of  feeding  apparatus  (not  to include return traps), no safety valve shall be set at a pressure higher than 94% of the lowest pressure obtained in the supply  main  feeding  the boiler.

History: 1979 AC.