Product Name: Alloy Steel Weld Neck Flange
Standard: ASME B16.5
Material: Alloy Steel ASTM A694 F65
Size: 12 Inch, DN300
Pressure Rating: Class 600 LB, PN100
Thickness: 12.7 mm
Facing: Raised Face
Surface Treatment: Black Anti-Rust Coating

Source: https://www.landeeflange.com/alloy-steel-wn-flange-asme-b16-5-a694-f65-12-inch-cl600.html