Product Catalog
Marzolf Flanges
102 parts match across 6 lines.
102 parts
Carbon Steel Backing Rings for Fiberglass Pipe
FRP · Reinforcement Backing Ring · Class 150 · 11 parts
This carbon steel backing ring sits behind molded fiberglass flanges to effectively disperse bolt torque and eliminate cracked flanges.
- Size
- 1 in
- O.D.
- 4-1/4"
- Bolt Circle
- 3-1/8"
- Holes
- 4
- Size
- 1-1/2 in
- O.D.
- 5"
- Bolt Circle
- 3-7/8"
- Holes
- 4
- Size
- 2 in
- O.D.
- 6"
- Bolt Circle
- 4-3/4"
- Holes
- 4
- Size
- 2-1/2 in
- O.D.
- 7"
- Bolt Circle
- 5-1/2"
- Holes
- 4
- Size
- 3 in
- O.D.
- 7-1/2"
- Bolt Circle
- 6"
- Holes
- 4
- Size
- 4 in
- O.D.
- 9"
- Bolt Circle
- 7-1/2"
- Holes
- 8
- Size
- 6 in
- O.D.
- 11"
- Bolt Circle
- 9-1/2"
- Holes
- 8
- Size
- 8 in
- O.D.
- 13-1/2"
- Bolt Circle
- 11-3/4"
- Holes
- 8
- Size
- 10 in
- O.D.
- 16"
- Bolt Circle
- 14-1/4"
- Holes
- 12
- Size
- 12 in
- O.D.
- 19"
- Bolt Circle
- 17"
- Holes
- 12
- Size
- 14 in
- O.D.
- 21"
- Bolt Circle
- 18-3/4"
- Holes
- 12
Stainless Steel Backing Rings for Fiberglass Pipe
FRP · Reinforcement Backing Ring · Class 150 · 11 parts
This stainless steel backing ring sits behind molded fiberglass flanges to effectively disperse bolt torque and eliminate cracked flanges.
- Size
- 1 in
- O.D.
- 4-1/4"
- Bolt Circle
- 3-1/8"
- Holes
- 4
- Size
- 1-1/2 in
- O.D.
- 5"
- Bolt Circle
- 3-7/8"
- Holes
- 4
- Size
- 2 in
- O.D.
- 6"
- Bolt Circle
- 4-3/4"
- Holes
- 4
- Size
- 2-1/2 in
- O.D.
- 7"
- Bolt Circle
- 5-1/2"
- Holes
- 4
- Size
- 3 in
- O.D.
- 7-1/2"
- Bolt Circle
- 6"
- Holes
- 4
- Size
- 4 in
- O.D.
- 9"
- Bolt Circle
- 7-1/2"
- Holes
- 8
- Size
- 6 in
- O.D.
- 11"
- Bolt Circle
- 9-1/2"
- Holes
- 8
- Size
- 8 in
- O.D.
- 13-1/2"
- Bolt Circle
- 11-3/4"
- Holes
- 8
- Size
- 10 in
- O.D.
- 16"
- Bolt Circle
- 14-1/4"
- Holes
- 12
- Size
- 12 in
- O.D.
- 19"
- Bolt Circle
- 17"
- Holes
- 12
- Size
- 14 in
- O.D.
- 21"
- Bolt Circle
- 18-3/4"
- Holes
- 12
Fiberglass Carbon Steel Standalone & Replacement Backing Ring
FRP · Standalone / Replacement Ring · Class 150 · 20 parts
- Size
- 1/2 in
- O.D.
- 3-1/2"
- Bolt Circle
- 2-3/8"
- Holes
- 4
- Size
- 3/4 in
- O.D.
- 3-7/8"
- Bolt Circle
- 2-3/4"
- Holes
- 4
- Size
- 1 in
- O.D.
- 4-1/4"
- Bolt Circle
- 3-1/8"
- Holes
- 4
- Size
- 1-1/4 in
- O.D.
- 4-5/8"
- Bolt Circle
- 3-1/2"
- Holes
- 4
- Size
- 1-1/2 in
- O.D.
- 5"
- Bolt Circle
- 3-7/8"
- Holes
- 4
- Size
- 2 in
- O.D.
- 6"
- Bolt Circle
- 4-3/4"
- Holes
- 4
- Size
- 2-1/2 in
- O.D.
- 7"
- Bolt Circle
- 5-1/2"
- Holes
- 4
- Size
- 3 in
- O.D.
- 7-1/2"
- Bolt Circle
- 6"
- Holes
- 4
- Size
- 4 in
- O.D.
- 9"
- Bolt Circle
- 7-1/2"
- Holes
- 8
- Size
- 5 in
- O.D.
- 10"
- Bolt Circle
- 8-1/2"
- Holes
- 8
- Size
- 6 in
- O.D.
- 11"
- Bolt Circle
- 9-1/2"
- Holes
- 8
- Size
- 8 in
- O.D.
- 13-1/2"
- Bolt Circle
- 11-3/4"
- Holes
- 8
- Size
- 10 in
- O.D.
- 16"
- Bolt Circle
- 14-1/4"
- Holes
- 12
- Size
- 12 in
- O.D.
- 19"
- Bolt Circle
- 17"
- Holes
- 12
- Size
- 14 in
- O.D.
- 21"
- Bolt Circle
- 18-3/4"
- Holes
- 12
- Size
- 16 in
- O.D.
- 23-1/2"
- Bolt Circle
- 21-1/4"
- Holes
- 16
- Size
- 18 in
- O.D.
- 25"
- Bolt Circle
- 22-3/4"
- Holes
- 16
- Size
- 20 in
- O.D.
- 27-1/2"
- Bolt Circle
- 25"
- Holes
- 20
- Size
- 24 in
- O.D.
- 32"
- Bolt Circle
- 29-1/2"
- Holes
- 20
- Size
- 30 in
- O.D.
- 38-3/4"
- Bolt Circle
- 36"
- Holes
- 28
Fiberglass Stainless Steel Standalone & Replacement Backing Ring
FRP · Standalone / Replacement Ring · Class 150 · 20 parts
- Size
- 1/2 in
- O.D.
- 3-1/2"
- Bolt Circle
- 2-3/8"
- Holes
- 4
- Size
- 3/4 in
- O.D.
- 3-7/8"
- Bolt Circle
- 2-3/4"
- Holes
- 4
- Size
- 1 in
- O.D.
- 4-1/4"
- Bolt Circle
- 3-1/8"
- Holes
- 4
- Size
- 1-1/4 in
- O.D.
- 4-5/8"
- Bolt Circle
- 3-1/2"
- Holes
- 4
- Size
- 1-1/2 in
- O.D.
- 5"
- Bolt Circle
- 3-7/8"
- Holes
- 4
- Size
- 2 in
- O.D.
- 6"
- Bolt Circle
- 4-3/4"
- Holes
- 4
- Size
- 2-1/2 in
- O.D.
- 7"
- Bolt Circle
- 5-1/2"
- Holes
- 4
- Size
- 3 in
- O.D.
- 7-1/2"
- Bolt Circle
- 6"
- Holes
- 4
- Size
- 4 in
- O.D.
- 9"
- Bolt Circle
- 7-1/2"
- Holes
- 8
- Size
- 5 in
- O.D.
- 10"
- Bolt Circle
- 8-1/2"
- Holes
- 8
- Size
- 6 in
- O.D.
- 11"
- Bolt Circle
- 9-1/2"
- Holes
- 8
- Size
- 8 in
- O.D.
- 13-1/2"
- Bolt Circle
- 11-3/4"
- Holes
- 8
- Size
- 10 in
- O.D.
- 16"
- Bolt Circle
- 14-1/4"
- Holes
- 12
- Size
- 12 in
- O.D.
- 19"
- Bolt Circle
- 17"
- Holes
- 12
- Size
- 14 in
- O.D.
- 21"
- Bolt Circle
- 18-3/4"
- Holes
- 12
- Size
- 16 in
- O.D.
- 23-1/2"
- Bolt Circle
- 21-1/4"
- Holes
- 16
- Size
- 18 in
- O.D.
- 25"
- Bolt Circle
- 22-3/4"
- Holes
- 16
- Size
- 20 in
- O.D.
- 27-1/2"
- Bolt Circle
- 25"
- Holes
- 20
- Size
- 24 in
- O.D.
- 32"
- Bolt Circle
- 29-1/2"
- Holes
- 20
- Size
- 30 in
- O.D.
- 38-3/4"
- Bolt Circle
- 36"
- Holes
- 28
Fiberglass Carbon Steel Spacer Plate & Compensation Ring
FRP · Spacer / Compensation Ring · Class 150 · 20 parts
- Size
- 1/2 in
- O.D.
- 3-1/2"
- Bolt Circle
- 2-3/8"
- Holes
- 4
- Size
- 3/4 in
- O.D.
- 3-7/8"
- Bolt Circle
- 2-3/4"
- Holes
- 4
- Size
- 1 in
- O.D.
- 4-1/4"
- Bolt Circle
- 3-1/8"
- Holes
- 4
- Size
- 1-1/4 in
- O.D.
- 4-5/8"
- Bolt Circle
- 3-1/2"
- Holes
- 4
- Size
- 1-1/2 in
- O.D.
- 5"
- Bolt Circle
- 3-7/8"
- Holes
- 4
- Size
- 2 in
- O.D.
- 6"
- Bolt Circle
- 4-3/4"
- Holes
- 4
- Size
- 2-1/2 in
- O.D.
- 7"
- Bolt Circle
- 5-1/2"
- Holes
- 4
- Size
- 3 in
- O.D.
- 7-1/2"
- Bolt Circle
- 6"
- Holes
- 4
- Size
- 4 in
- O.D.
- 9"
- Bolt Circle
- 7-1/2"
- Holes
- 8
- Size
- 5 in
- O.D.
- 10"
- Bolt Circle
- 8-1/2"
- Holes
- 8
- Size
- 6 in
- O.D.
- 11"
- Bolt Circle
- 9-1/2"
- Holes
- 8
- Size
- 8 in
- O.D.
- 13-1/2"
- Bolt Circle
- 11-3/4"
- Holes
- 8
- Size
- 10 in
- O.D.
- 16"
- Bolt Circle
- 14-1/4"
- Holes
- 12
- Size
- 12 in
- O.D.
- 19"
- Bolt Circle
- 17"
- Holes
- 12
- Size
- 14 in
- O.D.
- 21"
- Bolt Circle
- 18-3/4"
- Holes
- 12
- Size
- 16 in
- O.D.
- 23-1/2"
- Bolt Circle
- 21-1/4"
- Holes
- 16
- Size
- 18 in
- O.D.
- 25"
- Bolt Circle
- 22-3/4"
- Holes
- 16
- Size
- 20 in
- O.D.
- 27-1/2"
- Bolt Circle
- 25"
- Holes
- 20
- Size
- 24 in
- O.D.
- 32"
- Bolt Circle
- 29-1/2"
- Holes
- 20
- Size
- 30 in
- O.D.
- 38-3/4"
- Bolt Circle
- 36"
- Holes
- 28
Fiberglass Stainless Steel Spacer Plate & Compensation Ring
FRP · Spacer / Compensation Ring · Class 150 · 20 parts
- Size
- 1/2 in
- O.D.
- 3-1/2"
- Bolt Circle
- 2-3/8"
- Holes
- 4
- Size
- 3/4 in
- O.D.
- 3-7/8"
- Bolt Circle
- 2-3/4"
- Holes
- 4
- Size
- 1 in
- O.D.
- 4-1/4"
- Bolt Circle
- 3-1/8"
- Holes
- 4
- Size
- 1-1/4 in
- O.D.
- 4-5/8"
- Bolt Circle
- 3-1/2"
- Holes
- 4
- Size
- 1-1/2 in
- O.D.
- 5"
- Bolt Circle
- 3-7/8"
- Holes
- 4
- Size
- 2 in
- O.D.
- 6"
- Bolt Circle
- 4-3/4"
- Holes
- 4
- Size
- 2-1/2 in
- O.D.
- 7"
- Bolt Circle
- 5-1/2"
- Holes
- 4
- Size
- 3 in
- O.D.
- 7-1/2"
- Bolt Circle
- 6"
- Holes
- 4
- Size
- 4 in
- O.D.
- 9"
- Bolt Circle
- 7-1/2"
- Holes
- 8
- Size
- 5 in
- O.D.
- 10"
- Bolt Circle
- 8-1/2"
- Holes
- 8
- Size
- 6 in
- O.D.
- 11"
- Bolt Circle
- 9-1/2"
- Holes
- 8
- Size
- 8 in
- O.D.
- 13-1/2"
- Bolt Circle
- 11-3/4"
- Holes
- 8
- Size
- 10 in
- O.D.
- 16"
- Bolt Circle
- 14-1/4"
- Holes
- 12
- Size
- 12 in
- O.D.
- 19"
- Bolt Circle
- 17"
- Holes
- 12
- Size
- 14 in
- O.D.
- 21"
- Bolt Circle
- 18-3/4"
- Holes
- 12
- Size
- 16 in
- O.D.
- 23-1/2"
- Bolt Circle
- 21-1/4"
- Holes
- 16
- Size
- 18 in
- O.D.
- 25"
- Bolt Circle
- 22-3/4"
- Holes
- 16
- Size
- 20 in
- O.D.
- 27-1/2"
- Bolt Circle
- 25"
- Holes
- 20
- Size
- 24 in
- O.D.
- 32"
- Bolt Circle
- 29-1/2"
- Holes
- 20
- Size
- 30 in
- O.D.
- 38-3/4"
- Bolt Circle
- 36"
- Holes
- 28
Don't see your size?
We make split flanges to order. Your picks carry over, so you only add what is missing.