1.Carbon steel flange 2.Size: 1/2"-36" 3.Standard: ANSI B16.5 4.Certification: API, ISO 5.HS: 7304199000 1.Steel flange2.Material: Carbon Steel: ASTM A105, ASTM A350 LF1, LF2 CL1/CL2 LF3 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70 3.Types of Flange Faces: Raised Face, Flat-Face, Ring Joint, Tongue & Groove, and Male & Female3.High quality and service