Product Name: Stainless Steel Weld Neck Flanges
Material: ASTM A182 F316, Stainless Steel
Size: 16 Inch, DN400
Pressure Rating: Class 150 LB, PN20
Wall Thickness: SCH 80
Facing: Raised Face (RF)
Application: High-Cr Corrosion Environment

Source: https://www.landeeflange.com/stainless-steel-weld-neck-flanges-a182-f316-16-inch-cl150.html