Ductile Iron Pipe Flanges / Backing Rings - Multiple Sizes (9" / 10" / 11" OD)

These high-quality 4-inch Ductile Iron Split-Ring Backup Flanges offer an exceptional, heavy-duty solution for commercial fabrication, municipal waterlines, and industrial piping networks. Specifically engineered with a space-saving 0.3-inch profile thickness, these backing rings feature a 4.5-inch inner bore to slip smoothly over standard 4-inch nominal pipe stub ends. The evenly spaced 8-hole circle layout provides tight, uniform compression and a highly reliable gasket seal. Built to handle low-profile clearances, they offer the perfect structural support required to bolt piping assemblies together securely.

Specifications & Key Features

·         Plate Thickness: 0.30 inches (Slim, compact profile design).

·         Material Base: Heavy-duty ductile iron ready for immediate industrial deployment.

·         Ideal Applications: Commercial pipe installations, industrial fluid lines, municipal waterworks, and backing ring setups for structural fabrication.

Available Sizes (Trade vs. Actual Measurements):

·         4" Tight-Clearance Flange: 9.00" Outer Diameter (OD) with a 4.50" Inner Bore (ID).

·         4" Standard Industrial Flange: 10.00" Outer Diameter (OD) with a 4.50" Inner Bore (ID). (Weight: 4.05 lbs).

·         6" Industrial Flange: 11.00" Outer Diameter (OD) with a 6.80" Inner Bore (ID.

Condition: Used Like New

·         Functionality: 10/10

·         Aesthetics: 9/10

Our Price (Cowboy Tools): $20 each (GST Included)

Massive Retail Savings: Brand new commercial backing rings in these sizing classes typically retail from $25.00 to $55.00+ CAD each across major Canadian commercial supply networks, while a standard 4-pack sells online for roughly $95.00