BS 3293 Slip-on Flange Provider: ASTM A105 Slip-on Flanges, ASTM A105, BS 3293, 40 Inch SO Flanges, Class 150 LB, RF Ends.
ASTM A105N Slip on Flange Supplier: ASME B16.5 Slip on Flange, ASTM A105N, FBE Coating, ASME B16.5, 2 Inch (DN50), Class 150 LB, (PN20).