Selecting and Measuring Expansion Joints
For information about selecting pipe size, see Selecting and Measuring Pipe & Fittings.
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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 |
For Pipe Size | |||||
|---|---|---|---|---|---|
| (A) | (B) | Rod Lg. | Includes | Pkg. | |
| 2 | 1 | 14" | Four Limit Rod Plates, Two Limit Rods with Nuts | 00000000 | 0000000 |
Expansion Joints with Threaded Ends
- For Use With: Air, Grease, Oil, Water
- Temperature Range: 0° to 240° F
- Maximum Pressure: 150 psi @ 72° F
- Maximum Vacuum: 16 in. of Hg @ 72° F
Connect male threaded pipe to these expansion joints to add a point of flexibility in your line that reduces stress, vibration, and noise. These joints have a double-bulb design that absorbs more movement and vibration than other expansion joints. Made of neoprene rubber, they’re more abrasion resistant than silicone rubber joints. Their flexible body is reinforced with nylon for added strength.
For technical drawings and 3-D models, click on a part number.
Distance | NPT Female Threads | |||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Lg. | Compression | Expansion | Offset | Expansion Joint Type | Fitting Material | Each | |
Neoprene Rubber | ||||||||
| 1 | 8" | 7/8" | 1/4" | 7/8" | Double Bulb | Iron | 0000000 | 000000 |
Expansion Joints with Socket Connection for Plastic Pipe
Reduce stress, vibration, and noise in your plastic socket-connect piping system by creating a point of flexibility. These expansion joints have a double-bulb design, so they absorb even more movement and vibration than other expansion joints. Their body is EPDM rubber that's reinforced with nylon for added strength.
Warning: Never use plastic pipe fittings and pipe with compressed air or gas.
For technical drawings and 3-D models, click on a part number.
- For Use With: Alcohol, Water
- Temperature Range: 40° to 140° F
- Maximum Pressure: 150 psi @ 72° F
- Maximum Vacuum: 26 in. of Hg @ 72° F
- Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
To attach joints, connect to unthreaded male socket-connect fittings or pipe using a PVC primer and cement (also known as solvent weld).
- For Use With: Alcohol, Water
- Temperature Range: 40° to 200° F
- Maximum Pressure: 150 psi @ 72° F
- Maximum Vacuum: 26 in. of Hg @ 72° F
- Pipe Nipples and Pipe: Use Schedule 80 CPVC Plastic
To attach joints, connect to unthreaded male socket-connect fittings or pipe using a CPVC primer and cement (also known as solvent weld).