All flanged process connections, except those for internal displacer level instruments shall have a flanged gate block valve, directly connected to the process connection.

 
  • 所有法蘭工藝接頭,不包括內浮子液位計,應有一個(gè)法蘭閘門(mén)型截止閥,直接連接到工藝接頭。
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