JIS B2311 concentric reducer

JIS B2311 concentric reducer Specifications 1.Size:1/2"-48",DN15-DN1200 2.Material:Carbon steel: ASTM/ASME A234 WPB-WPC, ST37.2. Alloy steel:ST52, 15CrMo,WP 1-WP 12 ,WP 11-WP 22 ,WP 5-WP 91 Stainless steel: ASTM/ASME A403 WP 304,304L, A403 WP 316,316L,321 3.Pressure:Sch5-Sch160,XXS 4.Standards: ISO, ANSI. JIS. DIN GB/T12459,GB/T13401,ASME B16.9,SH3408 SH3409,HG/T21635,HG/T21631,SY/T05010 5.Surface treatment:Shot blasted, rust-proof black painted. 6.Usage: Petroleum, chemical,