Product Name: ASME B16.5 Weld Neck Flanges
Type: Weld Neck Flange (WN)
Design Standard: ASME B16.5
Material: Carbon Steel ASTM A105
Size: 4 Inches, DN100
Pressure: Class 300 LB, PN50
Face Type: Raised Face
Source: https://www.landeeflange.com/asme-b16-5-weld-neck-flanges-astm-a105-4-inches-cl300-lb.html