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Home > Products > Flange > Ductile Iron Backing Ring

Ductile Iron Backing Ring

Ductile Iron Backing Ring

  1. 1. Raw Materials: Ductile Iron to ASTM A536 Gr64/45/12
  2. 2. Diameter : 1 inch – 24 inch
  3. 3. Surface finish : Painted, Fusion bounded epoxy resin
  4. 4. Standards: ANSI B16.5 Class 150

 

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Specification Of Backing Ring

Puhui can provide Stainless or Galvanised Metal Backing Rings Flange,  Ductile Iron Backing Ring, PP Flange and PP Coated Steel Flange.

       

 

Main Uses

  • Stabilizes flange connections in non-self-supporting pipe installations.
  • Ensures even bolt tension to maintain joint integrity.
  • Serves as a solid support for plastic pipe flange adaptors.

 

Applications

  • Used in water and wastewater infrastructure.
  • Applied in industrial and marine piping systems.
  • Integral to gas and oil pipeline safety.

 

Advantages

  • Exceptional strength for high-stress environments.
  • Flexibility to prevent cracking under pressure.
  • Corrosion resistance for longevity.
  • Versatile fit for various pipe sizes and materials.

 

 

 

 

Size Pressure SDR Type OD ID T Bolt No. Bolt Hole Dia Bolt Hole Circle
                B.D. B.C.
1″ 267 PSI 7 C 4.25 1.38 0.56 4 0.63 3.12
1 1/4″ 267 PSI 7 C 4.62 1.72 0.63 4 0.63 3.5
1 1/2″ 267 PSI 7 C 5 1.97 0.69 4 0.63 3.88
2″ 267 PSI 7 C 6 2.46 0.75 4 0.75 4.75
2 1/2″ 267 PSI 7 C 7 2.97 0.88 4 0.75 5.5
3″ 267 PSI 7 C 7.5 3.6 0.94 4 0.75 6
4″ 267 PSI 7 C 9 4.6 0.94 8 0.75 7.5
5″ 267 PSI 7 C 10 5.69 0.94 8 0.88 8.5
6″ 267 PSI 7 C 11 6.75 1 8 0.88 9.5
8″ 267 PSI 7 C 13.5 8.75 1.12 8 0.88 11.75
10″ 267 PSI 7 C 16 10.92 1.19 12 1 14.25
12″ 267 PSI 7 C 19 12.92 1.5 12 1 17

 

Size Pressure SDR Type OD ID T Bolt No. Bolt Hole Dia Bolt Hole Circle
                B.D. B.C.
2″ 160PSI 11 B 6 2.64 0.51 4 0.75 4.75
3″ 160PSI 11 B 7.5 3.75 0.53 4 0.75 6
4″ 160PSI 11 B 9 4.8 0.55 8 0.75 7.5
6″ 160PSI 11 B 11 6.9 0.63 8 0.88 9.5
8″ 160PSI 11 B 13.5 8.9 0.87 8 0.88 11.75
10″ 160PSI 11 B 16 11 0.98 12 1 14.25
12″ 160PSI 11 B 19 13.15 1.26 12 1.13 18.75
14″ 160PSI 11 B 21 14.4 1.38 12 1.13 21.25
16″ 160PSI 11 B 23.5 16.4 1.65 16 1.13 21.25
18″ 160PSI 11 B 25 18.4 1.69 16 1.25 22.75
20″ 160PSI 11 B 27.5 20.5 1.81 20 1.25 25
22″ 160PSI 11 B 29.5 22.5 2.01 20 1.38 27.25
24″ 160PSI 11 B 32 24.5 2.17 20 1.38 29.5

 

Size Pressure SDR Type OD ID T Bolt No. Bolt Hole Dia Bolt Hole Circle
B.D. B.C.
2″ 267 PSI 7 B 6 2.63 0.75 4 0.75 4.75
3″ 267 PSI 7 B 7.5 3.75 0.94 4 0.75 6
4″ 267 PSI 7 B 9 4.75 0.94 8 0.75 7.5
6″ 267 PSI 7 B 11 6.88 1 8 0.88 9.5
8″ 267 PSI 7 B 13.5 8.88 1.12 8 0.88 11.75
10″ 267 PSI 7 B 16 11 1.19 12 1 14.25
12″ 267 PSI 7 B 19 13.13 1.5 12 1 17


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