Specification :

BS EN545 Ductile Iron Pipe Fittings
Key products: Flange Spigots,Flanged Sockets,Double Flanged Bends,Double Flanged Taper,Double Socket Bends,Double Socket Taper,All Flanged Tees,All socket tees,Double Socket Tee with Flanged Branch
Design: BS EN545,EN598;ISO2531;BS4772
Size: DN80-DN1600
Pressure: PN10,PN16,PN25.
Material: Ductile Iron GGG40,GGG50
Type of connection: Push-on Joint & Flange Joint
Internal lining: Cement Mortar Lined according to ISO 4179 .
External Coating:Black Bitumen Coated or Blue Fusion Bonded Epoxy Coated as specified.
You can refer to http://www.unicflow.com for detail specifications.