Selecting and Measuring Expansion Joints
For information about selecting pipe size, see Selecting and Measuring Pipe & Fittings.
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Expansion Joints with Flanged Ends
These joints reduce stress, vibration, and noise in piping systems by providing a point of flexibility to absorb movement. 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.
Position the expansion joints as close as possible to anchor points. Attach limit rod sets (sold separately) to the flanges to prevent overextension where anchoring is insufficient. To accommodate the thickness of the limit rod mounting plate, use bolts that are 7/8" longer than the bolts connecting the expansion joint to the pipe flange. Each set of limit rods requires eight bolts (not included).
For technical drawings and 3-D models, click on a part number.
- For Use With: Nonabrasive Slurry, Water
- Temperature Range: -10° to 220° F
- Maximum Pressure: 220 psi @ 72° F
- Maximum Vacuum: 26 in. of Hg @ 72° F
- For Use With: Alcohol, Water
- Temperature Range: -20° to 250° F
- Maximum Pressure: 220 psi @ 72° F
- Maximum Vacuum: 26 in. of Hg @ 72° F
Expansion Joints with Sealing Flanged Ends for Plastic Pipe
These joints reduce stress, vibration, and noise in plastic piping systems by providing a point of flexibility to absorb movement. Joints provide a tighter seal than other expansion joints because the flanges are molded into the body for a wide sealing surface. 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.
Neoprene joints resist abrasion better than EPDM joints.
Position the expansion joints as close as possible to anchor points. Attach limit rod sets (sold separately) to the flanges to prevent overextension where anchoring is insufficient. To accommodate the thickness of the limit rod mounting plate, use bolts that are 7/8" longer than the bolts connecting the expansion joint to the pipe flange. Each set of limit rods requires eight bolts (not included).
For technical drawings and 3-D models, click on a part number.
- For Use With: Natural Gas, Oil, Water
- Temperature Range: -10° to 220° F
- Maximum Pressure: See table
- Maximum Vacuum: 24 in. of Hg @ 72° F
- For Use With: Alcohol, Water
- Temperature Range: -20° to 250° F
- Maximum Pressure: 220 psi @ 72° F
- Maximum Vacuum: 24 in. of Hg @ 72° F
Chemical-Resistant Expansion Joints with Flanged Ends
- For Use With: Coolant, Hydrochloric Acid, Water
- Temperature Range: -0° to 400° F
- Maximum Pressure: See table
- Maximum Vacuum: 29 in. of Hg @ 72° F
The PTFE body on these expansion joints has a super-smooth surface that stands up to corrosive chemicals. Joints have a triple-bulb design that provides excellent vibration absorption, reducing stress on your piping system. The flanges mate with a same-size flat-surface Class 150 flange without the need for a gasket. Limit rods are attached to the flanges to prevent overextension.
For technical drawings and 3-D models, click on a part number.
Distance | Threaded Bolt Holes | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Flange OD | Pipe Size  | Lg. | No. of Bolt Holes | Compression | Expansion | Offset | Max. Pressure | Expansion Joint Type | Flange Material | Bolt Hole Thread Size | Each | |
Ultra-Corrosion-Resistant Coated PTFE Plastic | ||||||||||||
| 5" | 1 1/2 | 2" | 4 | 1/2" | 1/2" | 1/4" | 130 psi @ 72° F | Triple Bulb | Iron | 1/2"-13 | 0000000 | 0000000 |
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.
Attach limit rod sets (sold separately) to the flanges to prevent overextension where anchoring is insufficient. To accommodate the thickness of the limit rod mounting plate, use bolts that are 7/8" longer than the bolts connecting the expansion joint to the pipe flange. Each set of limit rods requires eight bolts (not included).
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
- For Use With: Alcohol, Water
- Temperature Range: -20° to 250° F
- Maximum Pressure: 220 psi @ 72° F
- Maximum Vacuum: 26 in. of Hg @ 72° F
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" | 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 | 0000000 |
For Pipe Size | |||||
|---|---|---|---|---|---|
| (A) | (B) | Rod Lg. | Includes | Pkg. | |
| 2 | 1 1/2 | 14" | Four Limit Rod Plates, Two Limit Rods with Nuts | 00000000 | 0000000 |
Expansion Joints with Flanged Ends for Drinking Water
- For Use With: Drinking Water
- Temperature Range: -20° to 250° F
- Maximum Pressure: See table
- Maximum Vacuum: 26in. of Hg @ 72° F
- Specifications Met: NSF/ANSI 61
The EPDM lining in these joints meets NSF/ANSI 61 standard for use with drinking water. To reduce stress, vibration, and noise in piping systems, they provide a point of flexibility to absorb movement. These joints have a flexible body reinforced with polyester cord for added strength. A zinc-plated steel plate supports each flange. The flanges mate with the same-size flat-surface Class 150 flange without the need for a gasket.
Position the expansion joints as close as possible to anchor points. Attach limit rod sets (sold separately) to the flanges to prevent overextension where anchoring is insufficient. To accommodate the thickness of the limit rod mounting plate, use bolts that are 7/8" longer than the bolts connecting the expansion joint to the pipe flange. Each set of limit rods requires eight bolts (not included).
For technical drawings and 3-D models, click on a part number.
Expansion Joints | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Distance | Limit Rod Sets | |||||||||||||
| Flange OD | Pipe Size | Lg. | No. of Bolt Holes | Compression | Expansion | Offset | Max. Pressure | Expansion Joint Type | Flange Material | Bolt Hole Size | Each | Pair | ||
EPDM Rubber with EPDM Rubber Liner | ||||||||||||||
| 5" | 1 1/2 | 6" | 4 | 3/4" | 3/8" | 1/2" | 200 psi @ 72° F | Single Bulb | Zinc-Plated Steel | 5/8" | 0000000 | 0000000 | 0000000 | 0000000 |
Clamp-On Expansion Joints for Drain, Waste, and Vent
- For Use With: Air, Water
- Temperature Range: -30° to 130° F
- Maximum Pressure: 4 psi @ 72° F
These joints are designed for vertical use to reduce stress, vibration, and noise in drain, waste, and vent systems. Slip them over the end of your pipe and tighten the band clamps for a secure hold. They have an internal stop to ensure pipe is in the proper position.
For technical drawings and 3-D models, click on a part number.
Distance | ||||||||
|---|---|---|---|---|---|---|---|---|
| For Pipe OD | Pipe Size | Lg. | Compression | Expansion | Expansion Joint Type | Band Clamp Material | Each | |
PVC Plastic | ||||||||
| 1.9" | 1 1/2 | 4" | 1/2" | 1 1/2" | Single Bulb | 301 Stainless Steel | 00000000 | 000000 |
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 1/2 | 8" | 7/8" | 1/4" | 7/8" | Double Bulb | Iron | 0000000 | 0000000 |
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).