American standards: ASME B 16.5 / b16.47A&B / B16.48 / AWWA pressure: 150lb, 300lb, 400lb, 600lb,900lb, 1500lb,2500lb type specificationitem: carbon steel slip on flangesize: 1/2' to 48'standard: ANSI B16.5, B16.47pressure: 150lb, 300lb, 400lb, 600lb,900lb, 1500lb,2500lbmaterial: ASTM A105, A105N, A350, LF2, LF3, Q235, 20#, 45#, 20Mn. 16Mn,Q345, etc.face: RF, FFsurface treatment: black painting, ...