Product Name: ASME B16.47 Series A Blind Flanges, Large Diameter
Design Standard: ASME B16.47 Series A
Material: ASTM A105, Forged Carbon Steel
Size: 40 Inch, DN1000
Pressure Rating: Class 150 LB, PN20
Facing: Raised Face
Surface Treatment: Black Painting
Source: https://www.landeeflange.com/asme-b16-47-series-a-blind-flanges-a105-40-inch-cl150-rf.html