Product Item: Duplex Stainless Steel Weld Neck Flange, WN Flange
Standard: ASME B16.5
Material: ASTM A182 F51
Size: 6 Inch, DN150
Pressure Rating: Class 600 LB
Face Type: RF (Raised Face)
Source: https://www.landee.cn/astm-a182-f51-weld-neck-flanges-asme-b16-5-6-in-cl600-rf.html