... 5%Hardness<250HBProof stress >300mpaDuctile iron pipe fittings type:Flange Series: double flanged 11.25 22. ... & Nuts in Carbon Steel grade 4.8"T" type pipes fittings: double socket 11.25 22.5 ... socket DN80-2000Accessories of "T" type pipe fittings: Gaskets according with EPDM."K"type pipe fittings: BOLTED ... series, push-on socket pipe fittings, K-type bolted gland pipe fittings, PVC pipe fittings series ...