Product Name: ASTM A105N Weld Neck Flange (High Pressure, Big Wall Thickness)
Type: WN Flange
Standard: ASME B16.5
Material: ASTM A105N
Size: 6 Inch
Pressure Rating: Class 900 LB
Schedule: SCH 120
Facing: Raised Face (RF)
Source: https://www.landee.cn/astm-a105n-weld-neck-flanges-asme-b16-5-6-inch-cl900-rf.html