Ductile Iron Backing Rings( Flanges) are used with HDPE/PP stub end and flange adaptors, and have adavantages of higher strength, less weight and anti corrosion.
Surface finish: powder coated, hot-dipped galvalised, painted.
Material: Ductile Iron to ASTM A536 Gr 65/45/12
Drilling: To ANSI B16.5 Class 150
Smart Joint produce a full range of HDPE flange adaptors up to 63" and offer a whole package for HDPE adaptors and backing rings to the customer.