CARBON STEEL FLANGES Material Standards & Grades : ASTM A105 N, A350 LF2 , A694 F52 in accordance to ASME B16.5, ASME B16.47, MSS-SP-44, NACE MR-01-75Types: Weldneck, Blind, Slip on, Threaded, SocketweldSizes: to 36 in all Standard SchedulesPressure Class: 150, 300, 600, 900, 1500, 2500 & PN10, PN16, PN25, PN40Brands : ST-KOREA, Neumira Spain.Ulma Spain.Melesi Italy.Metalfar Italy & China origin.