Polypropylene Coated Ductile Iron • Extra Resistance to Chemical Erosion Deltaflex Backing Flange Polypropylene Encapsulated Ductile Iron Material Cast Ductile Iron GGG40 ( ASTM A536 ) Encapsulated with 30% fibreglass reinforced polypropylene- black in colour. DimensionsIS0/DIN PN10 bolt circle PN10/ BS4504 Table 10 Suited for Polypropylene , PVC U , ABS , PE , PVDF stub flanges for socket fusion and solvent fusion when working with pressure pipe and fittings. Lighter in weight which helps when handling and out performs conventional steel flanges, backing rings. Polypropylene has excellent resistance to corrosive chemicals in a temperature range -20 to +100 degrees.
