350mm Metric PN16 Flat Face Backing Flange Reduced Thickness ASTM/ASME SA182 F304/L BS EN1092-1 NACE MR.01.75 520mm OD / 365mm ID / 22mm Thick

DN350 Metric PN16 Reduced Thickness 22mm 3M Green Scotchkote 206N or Resicoat R4 Backing Flanges DWI and WRAS Approved OD 520MM / ID 364MM / THK 22MM

356mm x 3.0mm 304/L Collars EN1092-1 Type 33

DN350 Metric PN16 Reduced Thickness 22mm Bright Zinc Plated Backing Flanges OD 520MM / ID 365MM / THK 22M