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.
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" | 9413K61 | 0000000 | 9413K41 | 0000000 |
| 7" | 2 1/2 | 6" | 4 | 15/16" | 5/16" | 5/16" | Bellow | Steel | 3/4" | 9413K62 | 000000 | 9413K42 | 000000 |
| 7 1/2" | 3 | 6" | 4 | 15/16" | 5/16" | 1/4" | Bellow | Steel | 3/4" | 9413K63 | 000000 | 9413K43 | 000000 |
| 9" | 4 | 6" | 8 | 15/16" | 5/16" | 3/16" | Bellow | Steel | 3/4" | 9413K64 | 000000 | 9413K44 | 000000 |
| 10" | 5 | 6" | 8 | 15/16" | 5/16" | 3/16" | Bellow | Steel | 7/8" | 9413K65 | 000000 | 9413K45 | 000000 |
| 11" | 6 | 6" | 8 | 15/16" | 5/16" | 1/8" | Bellow | Steel | 7/8" | 9413K66 | 000000 | 9413K46 | 000000 |
| 13 1/2" | 8 | 6" | 8 | 1" | 3/8" | 1/8" | Bellow | Steel | 7/8" | 9413K67 | 00000000 | 9413K47 | 000000 |
| 16" | 10 | 8" | 12 | 1 1/4" | 3/8" | 1/8" | Bellow | Steel | 1" | 9413K68 | 00000000 | 9413K48 | 000000 |
| 19" | 12 | 8" | 12 | 1 1/4" | 3/8" | 1/8" | Bellow | Steel | 1" | 9413K69 | 00000000 | 9413K49 | 000000 |
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 Use With: Natural Gas, Oil, Water
- Temperature Range: -10° to 220° F
- Maximum Pressure: See table
- Maximum Vacuum: 24 in. of Hg @ 72° F
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 | ||
| 5" | 1 1/2 | 6" | 4 | 1 1/2" | 5/8" | 3/4" | 225 psi @ 72° F | Single Bulb | Zinc-Plated Steel | 5/8" | 4528K21 | 0000000 | 9175K82 | 0000000 |
| 6" | 2 | 6" | 4 | 1 1/2" | 5/8" | 3/4" | 225 psi @ 72° F | Single Bulb | Zinc-Plated Steel | 3/4" | 4528K22 | 000000 | 9175K83 | 000000 |
| 7 1/2" | 3 | 6" | 4 | 1 1/2" | 5/8" | 3/4" | 225 psi @ 72° F | Single Bulb | Zinc-Plated Steel | 3/4" | 4528K23 | 000000 | 9175K85 | 000000 |
| 9" | 4 | 6" | 8 | 1 1/2" | 5/8" | 3/4" | 225 psi @ 72° F | Single Bulb | Zinc-Plated Steel | 3/4" | 4528K24 | 000000 | 9175K86 | 000000 |
| 11" | 6 | 6" | 8 | 1 1/2" | 5/8" | 3/4" | 210 psi @ 72° F | Single Bulb | Zinc-Plated Steel | 7/8" | 4528K25 | 000000 | 9175K88 | 000000 |
| 13 1/2" | 8 | 6" | 8 | 1 1/2" | 5/8" | 3/4" | 210 psi @ 72° F | Single Bulb | Zinc-Plated Steel | 7/8" | 4528K26 | 000000 | 9175K89 | 000000 |
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.
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 | 5254K11 | 0000000 |
| 4 1/2" | 4 | 6" | 5/8" | 1/4" | 1/16" | Bellow | Steel | 5254K12 | 000000 |
| 5 9/16" | 5 | 7 1/2" | 5/8" | 1/4" | 1/16" | Bellow | Steel | 5254K13 | 000000 |
| 6 5/8" | 6 | 9" | 13/16" | 3/8" | 1/16" | Bellow | Steel | 5254K14 | 000000 |
| 8 5/8" | 8 | 8 1/2" | 13/16" | 3/8" | 1/16" | Bellow | Steel | 5254K15 | 00000000 |
| 10 3/4" | 10 | 9 1/2" | 13/16" | 7/16" | 1/16" | Bellow | Steel | 5254K16 | 00000000 |