Selecting and Measuring Expansion Joints
For information about selecting pipe size, see Selecting and Measuring Pipe & Fittings.
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High-Temperature All-Metal Expansion Joints with Flanged Ends
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Temperature Range: -20° to 800° F
- Maximum Pressure: 150 psi @ 72° F
- Maximum Vacuum: 29 in. of Hg @ 72° F
These all-metal expansion joints can handle higher temperatures than rubber expansion joints. They reduce stress, vibration, and noise in piping systems by providing a point of flexibility to absorb movement. Joints are made of 304 stainless steel for very good corrosion resistance. The flanged ends rotate for easy bolt hole alignment during installation. Flanges mate with a same-size flat-surface Class 150 flange with a gasket (sold separately).
Liners (sold separately) slide into the expansion joint to provide a smooth interior for unrestricted flow.
For technical drawings and 3-D models, click on a part number.
Expansion Joints | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Distance | Liners | ||||||||||||
| Flange OD | Pipe Size  | Lg. | No. of Bolt Holes | Compression | Expansion | Offset | Expansion Joint Type | Flange Material | Bolt Hole Size | Each | Each | ||
304 Stainless Steel | |||||||||||||
| 6" | 2 | 6" | 4 | 15/16" | 5/16" | 3/8" | Bellow | Steel | 3/4" | 0000000 | 0000000 | 0000000 | 0000000 |
| 7" | 2 1/2 | 6" | 4 | 15/16" | 5/16" | 5/16" | Bellow | Steel | 3/4" | 0000000 | 000000 | 0000000 | 000000 |
| 7 1/2" | 3 | 6" | 4 | 15/16" | 5/16" | 1/4" | Bellow | Steel | 3/4" | 0000000 | 000000 | 0000000 | 000000 |
| 9" | 4 | 6" | 8 | 15/16" | 5/16" | 3/16" | Bellow | Steel | 3/4" | 0000000 | 000000 | 0000000 | 000000 |
| 10" | 5 | 6" | 8 | 15/16" | 5/16" | 3/16" | Bellow | Steel | 7/8" | 0000000 | 000000 | 0000000 | 000000 |
| 11" | 6 | 6" | 8 | 15/16" | 5/16" | 1/8" | Bellow | Steel | 7/8" | 0000000 | 000000 | 0000000 | 000000 |
| 13 1/2" | 8 | 6" | 8 | 1" | 3/8" | 1/8" | Bellow | Steel | 7/8" | 0000000 | 000000 | 0000000 | 000000 |
| 16" | 10 | 8" | 12 | 1 1/4" | 3/8" | 1/8" | Bellow | Steel | 1" | 0000000 | 00000000 | 0000000 | 000000 |
| 19" | 12 | 8" | 12 | 1 1/4" | 3/8" | 1/8" | Bellow | Steel | 1" | 0000000 | 00000000 | 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 |
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 |
| 2 3/8" | 2 | 4" | 1/2" | 1 1/2" | Single Bulb | 301 Stainless Steel | 00000000 | 00000 |
| 3 1/2" | 3 | 4" | 1/2" | 1 1/2" | Single Bulb | 301 Stainless Steel | 00000000 | 00000 |
| 4 1/2" | 4 | 4" | 1/2" | 1 1/2" | Single Bulb | 301 Stainless Steel | 00000000 | 00000 |
Expansion Joints with Butt-Weld Ends
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Temperature Range: -20° to 800° F
- Maximum Pressure: 150 psi @ 72° F
- Maximum Vacuum: 29 in. of Hg @ 72° F
These joints weld to unthreaded pipe or another butt-weld fitting for a leak-resistant, permanent connection. They reduce stress, vibration, and noise in metal piping systems by providing a point of flexibility to absorb movement.
For technical drawings and 3-D models, click on a part number.
Distance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Pipe OD | Pipe Size | Lg. | Compression | Expansion | Offset | Expansion Joint Type | Butt Weld End Material | Each | |
321 Stainless Steel | |||||||||
| 3 1/2" | 3 | 5" | 3/8" | 3/16" | 1/16" | Bellow | Steel | 0000000 | 0000000 |
| 4 1/2" | 4 | 6" | 5/8" | 1/4" | 1/16" | Bellow | Steel | 0000000 | 000000 |
| 5 9/16" | 5 | 7 1/2" | 5/8" | 1/4" | 1/16" | Bellow | Steel | 0000000 | 000000 |
| 6 5/8" | 6 | 9" | 13/16" | 3/8" | 1/16" | Bellow | Steel | 0000000 | 000000 |
| 8 5/8" | 8 | 8 1/2" | 13/16" | 3/8" | 1/16" | Bellow | Steel | 0000000 | 00000000 |
| 10 3/4" | 10 | 9 1/2" | 13/16" | 7/16" | 1/16" | Bellow | Steel | 0000000 | 00000000 |
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 | ||||||||
| 3/4 | 8" | 7/8" | 1/4" | 7/8" | Double Bulb | Iron | 0000000 | 000000 |
| 1 | 8" | 7/8" | 1/4" | 7/8" | Double Bulb | Iron | 0000000 | 00000 |
| 1 1/4 | 8" | 7/8" | 1/4" | 7/8" | Double Bulb | Iron | 0000000 | 00000 |
| 1 1/2 | 8" | 7/8" | 1/4" | 7/8" | Double Bulb | Iron | 0000000 | 000000 |
| 2 | 8" | 7/8" | 1/4" | 7/8" | Double Bulb | Iron | 0000000 | 000000 |