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  1. AWWA Class D Steel Ring Flanges - API International, Inc.

  2. Ring Flanges - McMaster-Carr

  3. Ring Joint Flanges - Texas Flange

  4. AWWA Class F Steel Ring Flanges - API International, Inc.

  5. Class 2D AWWA Standard Steel-Ring Flange

  6. Class 5E AWWA Standard Steel-Ring Flange

  7. AWWA C207 Class D Ring Flange - Piping & Pipeline

  8. AWWA Class SB Stainless Steel Ring Flanges - API International, Inc.

  9. AWWA C207 Class E Ring Flange - Piping & Pipeline

  10. Ring Type Joint Flange | ASME B16.5 Carbon Steel Raised face rtj flange