General Specifications:

• Nominal Pipe Size (NPS): 4 inches
• Pipe Schedule: 40 (Standard Wall Thickness)
• Flange Type: Could be Slip-On, Weld Neck, Blind, Threaded, Lap Joint, or Socket Weld
• Material: Typically Carbon Steel (ASTM A105), Stainless Steel (ASTM A182 F304/F316), or Ductile Iron
• Pressure Rating: 150# (Class 150), 300#, or higher depending on application
• Flange Standard: ANSI B16.5 / ASME B16.5

Dimensions for a 4” ANSI B16.5 Class 150 Flange:

• Outside Diameter (O.D.): 9 inches (229 mm)
• Bolt Circle Diameter: 7.5 inches (191 mm)
• Bolt Holes: 8 holes, diameter 3/4"
• Flange Thickness: Approx. 0.88 inches (22 mm)