... B16.9/B16,11/B16.28,DIN2605-2642,JIS,ISO 3)Wall thickness:Sch5s-SGP 4)Elbow,tee,reducer,cap pipe fittings ... , carbon steel5) Surface treatment: transparent oil, rust-proof oil6) Nominal wall thickness: Sch5s, 10s, 20s, 40s, Sch10, 20, 30, 40, 60 ...