Weld Neck Flange:pipe flange, stardard:ISO,ASTM,ASME,API,MSS,EN, ... material:alloy steel.stainless steel,carbon s High Quality Weld Neck FlangeS235JR Carbon Steel Flange(UNI2276, UNI6083, UNI6089, UNI2280-2285, UNI2253 ... "- 80", DN15-600, DN650-DN2000.Type: Plate, Slip On, Weld Neck, Blind, Threaded, special mode.Material:Carbon steel: ST37.2, RST37 ...