... 4.Certificate:GL BV DNV Forged Steel Flange:1.26 years exporting experience2.Specification:1/ ... 2"-40"3.Flange Process:Forging Flange, Machining Flange, Cast Iron Flange4.Standard: DIN2533, ... LR DNV NK ABS7.Surface:Hot Dip Galvanized8.Flange Type:SOP, SOH, BL, PL, WN, ... -15-84.5.API Standard: API6056.Nonstandard FlangesThe flange types:1.JIS Standard: SOP, SOH, BL, ...