AWWA C207

ClassSteel-ring flangesSteel-hub flanges
Class B (86psi)NPS 4-144 (DN100-3600)
 Class D (175-150psi)NPS 4-144 (DN100-3600)NPS 4-96 (DN100-2400)
Class E (275psi)NPS 4-144 (DN100-3600)NPS 4-96 (DN100-2400)
Class F (300psi)NPS 4-48 (DN100-1200)