Selecting and Measuring Expansion Joints
For information about selecting pipe size, see Selecting and Measuring Pipe & Fittings.
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Expansion Joints with Sealing Flanged Ends for Metal Pipe
Because the flanges are molded into the body for a wide sealing surface, these joints provide a tighter seal than other expansion joints. Each flange is supported by a zinc-plated steel plate. Flanges mate with a same-size flat-surface Class 150 flange without the need for a gasket. Joints reduce stress, vibration, and noise in metal piping systems by providing a point of flexibility to absorb movement. They have a flexible body that is reinforced with cord for added strength.
For technical drawings and 3-D models, click on a part number.
- For Use With: Grain Alcohol, Nonabrasive Slurry, Water
- Temperature Range: -20° to 220° F
- Maximum Pressure: 190 psi @ 72° F
- Maximum Vacuum: 26 in. of Hg @ 72° F
Distance | Unthreaded Bolt Holes | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Flange OD | Pipe Size  | Lg. | No. of Bolt Holes | Compression | Expansion | Offset | Expansion Joint Type | Flange Material | Bolt Hole Size | Each | |
| 6" | 2 | 6" | 4 | 1 1/4" | 5/8" | 9/16" | Single Bulb | Neoprene Rubber | 3/4" | 0000000 | 0000000 |
| 7" | 2 1/2 | 6" | 4 | 1 1/4" | 5/8" | 9/16" | Single Bulb | Neoprene Rubber | 3/4" | 0000000 | 000000 |
| 7 1/2" | 3 | 6" | 4 | 1 1/4" | 5/8" | 9/16" | Single Bulb | Neoprene Rubber | 3/4" | 0000000 | 000000 |
| 9" | 4 | 6" | 8 | 1 1/4" | 5/8" | 9/16" | Single Bulb | Neoprene Rubber | 3/4" | 0000000 | 000000 |
| 11" | 6 | 6" | 8 | 1 1/4" | 5/8" | 9/16" | Single Bulb | Neoprene Rubber | 7/8" | 0000000 | 000000 |
| 13 1/2" | 8 | 6" | 8 | 1 1/4" | 5/8" | 9/16" | Single Bulb | Neoprene Rubber | 7/8" | 0000000 | 000000 |
Expansion Joints with Flanged Ends for High Vibration
These expansion joints have a double-bulb design for extra movement and vibration absorption. The flanged ends rotate for easy bolt hole alignment during installation. They mate with a same-size flat-surface Class 150 flange without the need for a gasket. Joints have a flexible body that is reinforced with nylon for added strength.
For technical drawings and 3-D models, click on a part number.
- For Use With: Grain Alcohol, Nonabrasive Slurry, Water
- Temperature Range: -10° to 220° F
- Maximum Pressure: 220 psi @ 72° F
- Maximum Vacuum: 26 in. of Hg @ 72° F
Distance | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Flange OD | Pipe Size | Lg. | No. of Bolt Holes | Compression | Expansion | Offset | Expansion Joint Type | Flange Material | Bolt Hole Thread Size | Each | |
| 5" | 1 1/2 | 7" | 4 | 2" | 1 3/16" | 1 3/4" | Double Bulb | Zinc-Plated Steel | 1/2"-13 | 0000000 | 000000 |
| 6" | 2 | 7" | 4 | 2" | 1 3/16" | 1 3/4" | Double Bulb | Zinc-Plated Steel | 5/8"-11 | 0000000 | 000000 |
| 7" | 2 1/2 | 7" | 4 | 2" | 1 3/16" | 1 3/4" | Double Bulb | Zinc-Plated Steel | 5/8"-11 | 0000000 | 000000 |
| 7 1/2" | 3 | 7" | 4 | 2" | 1 3/16" | 1 3/4" | Double Bulb | Zinc-Plated Steel | 5/8"-11 | 0000000 | 000000 |
| 9" | 4 | 9" | 8 | 2" | 1 3/8" | 1 9/16" | Double Bulb | Zinc-Plated Steel | 5/8"-11 | 0000000 | 000000 |
| 10" | 5 | 9" | 8 | 2" | 1 3/8" | 1 9/16" | Double Bulb | Zinc-Plated Steel | 3/4"-10 | 0000000 | 000000 |
| 11" | 6 | 9" | 8 | 2" | 1 3/8" | 1 9/16" | Double Bulb | Zinc-Plated Steel | 3/4"-10 | 0000000 | 000000 |
| 13 1/2" | 8 | 13" | 8 | 2 3/8" | 1 3/8" | 1 3/8" | Double Bulb | Zinc-Plated Steel | 3/4"-10 | 0000000 | 000000 |
| 16" | 10 | 13" | 12 | 2 3/8" | 1 3/8" | 1 3/8" | Double Bulb | Zinc-Plated Steel | 7/8"-9 | 0000000 | 000000 |
| 19" | 12 | 13" | 12 | 2 3/8" | 1 3/8" | 1 3/8" | Double Bulb | Zinc-Plated Steel | 7/8"-9 | 0000000 | 000000 |
Distance | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Flange OD | Pipe Size | Lg. | No. of Bolt Holes | Compression | Expansion | Offset | Expansion Joint Type | Flange Material | Bolt Hole Size | Each | |
| 5" | 1 1/2 | 7" | 4 | 2" | 1 3/16" | 1 3/4" | Double Bulb | Zinc-Plated Steel | 5/8" | 0000000 | 000000 |
| 6" | 2 | 7" | 4 | 2" | 1 3/16" | 1 3/4" | Double Bulb | Zinc-Plated Steel | 3/4" | 0000000 | 000000 |
| 7" | 2 1/2 | 7" | 4 | 2" | 1 3/16" | 1 3/4" | Double Bulb | Zinc-Plated Steel | 3/4" | 0000000 | 000000 |
| 7 1/2" | 3 | 7" | 4 | 2" | 1 3/16" | 1 3/4" | Double Bulb | Zinc-Plated Steel | 3/4" | 0000000 | 000000 |
| 9" | 4 | 9" | 8 | 2" | 1 3/8" | 1 9/16" | Double Bulb | Zinc-Plated Steel | 3/4" | 0000000 | 000000 |
| 10" | 5 | 9" | 8 | 2" | 1 3/8" | 1 9/16" | Double Bulb | Zinc-Plated Steel | 7/8" | 0000000 | 000000 |
| 11" | 6 | 9" | 8 | 2" | 1 3/8" | 1 9/16" | Double Bulb | Zinc-Plated Steel | 7/8" | 0000000 | 000000 |
| 13 1/2" | 8 | 13" | 8 | 2 3/8" | 1 3/8" | 1 3/8" | Double Bulb | Zinc-Plated Steel | 7/8" | 0000000 | 000000 |
| 16" | 10 | 13" | 12 | 2 3/8" | 1 3/8" | 1 3/8" | Double Bulb | Zinc-Plated Steel | 1" | 0000000 | 000000 |
| 19" | 12 | 13" | 12 | 2 3/8" | 1 3/8" | 1 3/8" | Double Bulb | Zinc-Plated Steel | 1" | 0000000 | 000000 |
Expansion Joint Reducers with Flanged Ends
Connect different pipe sizes in your line while adding a point of flexibility between them. These expansion joints absorb movement between two connected pipes to reduce stress, vibration, and noise. Their flanged ends mate with same-size Class 150 flanges without the need for a gasket. Each flange is supported by a zinc-plated steel plate. The body of these expansion joints is reinforced with cord for added strength.
Your pipe system must be rigidly anchored on both sides of the expansion joint to control expansion or contraction of the line. When proper anchoring cannot be provided, limit rods (sold separately) are required.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Alcohol, Calcium Chloride, Coolant, Grain Alcohol, Grease, Hydraulic Fluid, Sodium Carbonate (20% in Water), Water
- Temperature Range: -20° to 250° F
- Maximum Pressure: See Table
- Maximum Vacuum: 26 in. of Hg @ 72° F
Unthreaded Bolt Holes | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Flange OD | Pipe Size | No. of Bolt Holes | Distance | Bolt Hole Size | ||||||||||||
(A) | (B) | (A) | (B) | Lg. | (A) | (B) | Compression | Expansion | Offset | Max. Pressure | Expansion Joint Type | Flange Material | (A) | (B) | Each | |
EPDM Rubber | ||||||||||||||||
| 6" | 4 1/4" | 2 | 1 | 8" | 4 | 4 | 1" | 1/2" | 1/2" | 200 psi @ 72° F | Single Bulb | EPDM Rubber | 3/4" | 5/8" | 0000000 | 0000000 |
| 6" | 5" | 2 | 1 1/2 | 8" | 4 | 4 | 1" | 1/2" | 1/2" | 200 psi @ 72° F | Single Bulb | EPDM Rubber | 3/4" | 5/8" | 0000000 | 000000 |
| 7 1/2" | 6" | 3 | 2 | 8" | 4 | 4 | 1 3/8" | 11/16" | 1/2" | 200 psi @ 72° F | Single Bulb | EPDM Rubber | 3/4" | 3/4" | 0000000 | 000000 |
| 9" | 6" | 4 | 2 | 8" | 8 | 4 | 1 3/8" | 11/16" | 1/2" | 200 psi @ 72° F | Single Bulb | EPDM Rubber | 3/4" | 3/4" | 0000000 | 000000 |
| 9" | 7 1/2" | 4 | 3 | 8" | 8 | 4 | 1 3/8" | 11/16" | 1/2" | 200 psi @ 72° F | Single Bulb | EPDM Rubber | 3/4" | 3/4" | 0000000 | 000000 |
| 11" | 9" | 6 | 4 | 8" | 8 | 8 | 1 9/16" | 3/4" | 1/2" | 190 psi @ 72° F | Single Bulb | EPDM Rubber | 7/8" | 3/4" | 0000000 | 00000000 |
| 13 1/2" | 11" | 8 | 6 | 8" | 8 | 8 | 1 9/16" | 3/4" | 1/2" | 190 psi @ 72° F | Single Bulb | EPDM Rubber | 7/8" | 7/8" | 0000000 | 00000000 |
For Pipe Size | |||||
|---|---|---|---|---|---|
| (A) | (B) | Rod Lg. | Includes | Pkg. | |
| 2 | 1 | 14" | Four Limit Rod Plates, Two Limit Rods with Nuts | 00000000 | 0000000 |
| 2 | 1 1/2 | 14" | Four Limit Rod Plates, Two Limit Rods with Nuts | 00000000 | 000000 |
| 3 | 2 | 14" | Four Limit Rod Plates, Two Limit Rods with Nuts | 00000000 | 000000 |
| 4 | 2 | 14" | Four Limit Rod Plates, Two Limit Rods with Nuts | 00000000 | 000000 |
| 4 | 3 | 14" | Four Limit Rod Plates, Two Limit Rods with Nuts | 00000000 | 000000 |
| 6 | 4 | 14" | Four Limit Rod Plates, Two Limit Rods with Nuts | 00000000 | 000000 |
| 8 | 6 | 17" | Four Limit Rod Plates, Two Limit Rods with Nuts | 00000000 | 000000 |