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Anvil cast-iron threaded flange, 11 in OD, plain finish

Anvil

Anvil 308004001 Flange Threaded Flange 6" Pipe 11 in OD 175 psi Class 125

SKU CH-D1NE-WHX2V

Cast-iron threaded flange fits 6-inch pipe, rated 175 psi Class 125 with 11-inch outside diameter

  • Handles 175 psi maximum operating pressure for reliable high-pressure service
  • Operates from -20 to 150 degrees F across wide temperature ranges
  • Cast iron A197 construction delivers durability in demanding plumbing applications
  • 11 inch outside diameter with 8 bolt holes ensures secure flange connections
  • Class 125 rating meets standard industrial piping requirements

6-inch Class 125 Cast Iron Threaded Flange

This 6-inch nominal pipe size flange connects flanged piping to female NPT threads in low-pressure systems. The cast iron body meets A197 standards and carries a 175 psi maximum operating pressure rating at Class 125. It suits industrial plumbing, water distribution and HVAC installations requiring a flat-faced, drilled connection. The unit operates reliably between -20 and 150 degrees Fahrenheit.

Eight Bolt Holes and Flat Face Design

The flange includes eight bolt holes for secure mating with a matching flat-faced counterpart and gasket. A plain, uncoated finish allows the installer to apply preferred paint or corrosion protection on site. The faced and drilled configuration ensures proper alignment during assembly without additional machining. The 11-inch outside diameter and overall length match the Class 125 dimensional standard for 6-inch pipe.

175 psi Pressure Rating Decides Suitability

The 175 psi maximum operating pressure at Class 125 determines whether this flange matches your system design pressure. Installations exceeding this limit require a higher-class fitting. The A197 cast iron construction and flat-faced, threaded end connection fix the mechanical interface; verify bolt circle and gasket compatibility before purchase. This part does not serve applications needing welded neck, raised face or higher temperature ratings.

Highlights

  • Handles 175 psi maximum operating pressure for reliable high-pressure service
  • Operates from -20 to 150 degrees F across wide temperature ranges
  • Cast iron A197 construction delivers durability in demanding plumbing applications
  • 11 inch outside diameter with 8 bolt holes ensures secure flange connections
  • Class 125 rating meets standard industrial piping requirements

Specifications

BrandANVIL

Questions about this item

How often should the cast-iron A197 flange be inspected or replaced in a system that cycles between -20 °F and 150 °F?

Inspect the flange at each scheduled system shutdown; replace it if you see cracking, corrosion or bolt-hole elongation caused by repeated thermal expansion and contraction.

Which limit will be reached first when the line runs continuously at the 175 psi rating?

The 175 psi maximum operating pressure is the primary limit; sustained pressure at or above that value risks joint leakage or casting failure before temperature becomes a factor.

Does the plain cast-iron surface generate noticeable heat or noise when the flange carries fluid at 150 °F all day?

The flange itself produces no noise and only radiates the fluid temperature; any heat or sound comes from the flowing media, not from the casting.

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