Product Item: UNS N08020 Weld Neck Flange
Standard: ASME B16.5
Material: UNS N08020 (Alloy 20)
Size: 3 Inch, DN80
Pressure: Class 150 LB, PN20
Wall Thickness: SCH STD
Key Features: Excellent corrosion resistance, particularly in sulfuric acid and chloride-containing environments

Source: https://www.landee.cn/uns-n08020-weld-neck-flange-asme-b16-5-3-in-cl150-sch-std.html