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Mid-Corr Expansion Joints
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Mid-Corr expansion joints employ a standardized bellows design ideally suited for general industrial applications. Offered with flanges or butt weld ends from 2" to 24" nominal diameter for design pressures to 300 psig at 800° F. Large diameter available in our Metal Catalog.
How to order:
Example P/N |
| 8 |
HMCS |
FF |
300 |
6 |
L |
C |
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Mid-Corr Data
| Size Range |
2" to 24" NPS* |
Allowable Pressure
Stainless Steel Bellows |
Vacuum to 300 psi |
Temperature Limits
Stainless Steel Bellows |
-20°F to 800°F ** |
| Axial Traverse |
To 6.28" . . .
(depending on size) |
| Lateral Motion |
Up to 2.51" . . .
(depending on size) |
**With special alloys, temperatures of minus 425°F. to plus 1600°F. can be handled. |
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Materials of Construction
Bellows: ASTM A240 T304
Pipe: ASTM A53/A106
50 lb. Series: Sch. 40
150 lb. Series: Sch. 40
300 lb. Series: Sch. 40
Flanges: A36/A516-70 Plate (Std) A105 (Opt)
50 lb. Series: 150 lb. ANSI B16.5 F.F.S.O.
150 lb. Series: 150 lb. ANSI B16.5 F.F.S.O.
300 lb. Series: 300 lb. ANSI B16.5 F.F.S.O.
Covers: Carbon Steel
Tie Rods: Carbon Steel
Liners: 300 Series Stainless Steel
1. Rated cycle life is 2000 cycles per EJMA 7th edition for any one movement tabulated.
2. To combine axial, lateral movements, refer to page 6.
3. Maximum axial extension movement is 50% of tabulated axial value.
4. To obtain greater movements or cycle life, contact the factory.
5. Catalog pressure ratings are based upon a maximum bellows temperature of 800°F. Actual operating temperature should always be specified.
6. Maximum test pressure: 1 1/2 x maximum working pressure.
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Free Flexing Expansion Joints
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Senior Flexonics Pathway low pressure (50 psi), free-flexing expansion joints absorb pipe movement under pressure. Widely used in such applications as process and steam lines, ventilating lines, pump suction and discharge lines, turbine-to-condenser connections, fuel supply lines and bulkhead seals. Available with either vanstone flanges or welding ends attached.
Dual expansion joints are available for applications where movement is greater than can be absorbed by a single joint. Contact factory for design information.
How to order:
Example P/N |
| 6 |
HFF |
W |
50 |
8 |
L |
C |
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Free Flexing Data
| Size Range |
3" to 16" NPS* |
Allowable Pressure
Stainless Steel Bellows |
Vacuum to 50 psi |
Temperature Limits
Stainless Steel Bellows |
-20°F to 800°F ** |
| Axial Traverse |
To 7 1/2" . . .
(depending on size) |
| Lateral Motion |
Up to 1 3/4" . . .
(depending on size) |
*For sizes larger than 16" consult factory for information.
**With special alloys, temperatures of minus 300°F. to plus 1600°F. can be handled. |
Materials of Construction
- Bellows: ASTM A240 T304
- Pipe: ASTM A53/A106
50 lb. Series: Sch. 40
150 lb. Series: Sch. 40
300 lb. Series: Sch. 40
- Flanges: A36/A516-70 Plate (Std)
ASTM A105 (Opt)
50 lb. Series: 150 lb. ANSI B16.5 F.F.S.O.
150 lb. Series: 150 lb. ANSI B16.5 F.F.S.O.
300 lb. Series: 300 lb. ANSI B16.5 F.F.S.O.
- Covers: Carbon Steel
- Tie Rods: Carbon Steel
- Liners: 300 Series Stainless Steel
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- Rated cycle life is 2000 cycles per EJMA 7th edition for any one movement tabulated.
- Maximum axial extension movement is 50% of tabulated axial value.
- To obtain greater movements or cycle life, contact the factory.
- Catalog pressure ratings are based upon a maximum bellows temperature of 800°F. Actual operating temperature should always be specified.
- Maximum test pressure: 1 1/2 x maximum working pressure.
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Control Flexing Expansion Joints
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Senior Flexonics Pathway Control Flexing Expansion Joints combine a corrugated pressure carrier with closely mated neck rings and reinforcing or control rings. This construction permits their use with higher pressure (150 psi).
Dual expansion joints are available for applications where movement is greater than can be absorbed by a single joint. Contact factory for design information.
How to order:
Example P/N |
| 8 |
HCF |
FF |
300 |
6 |
L |
C |
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Controlled-Flexing Data
| Size Range |
3" to 16" NPS* |
Allowable Pressure
Stainless Steel Bellows |
Vacuum to 300 psi |
Temperature Limits
Stainless Steel Bellows |
-20°F to 800°F ** |
| Axial Traverse |
To 7 1/2" . . .
(depending on size) |
| Lateral Motion |
Up to 1 3/4" . . .
(depending on size) |
*For sizes larger than 16" consult factory for information.
**With special alloys, temperatures of minus 425°F. to plus 1600°F. can be handled. |
Materials of Construction
- Bellows: ASTM A240 T304
- Pipe: ASTM A53/A106
50 lb. Series: Sch. 40
150 lb. Series: Sch. 40
300 lb. Series: Sch. 40
- Flanges: A36/A516-70 Plate (Std)
ASTM A105 (Opt)
50 lb. Series: 150 lb. ANSI B16.5 F.F.S.O.
150 lb. Series: 150 lb. ANSI B16.5 F.F.S.O.
300 lb. Series: 300 lb. ANSI B16.5 F.F.S.O.
- Covers: Carbon Steel
- Tie Rods: Carbon Steel
- Liners: 300 Series Stainless Steel
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- Rated cycle life is 2000 cycles per EJMA 7th edition for any one movement tabulated.
- Maximum axial extension movement is 50% of tabulated axial value.
- To obtain greater movements or cycle life, contact the factory.
- Catalog pressure ratings are based upon a maximum bellows temperature of 800°F. Actual operating temperature should always be specified.
- Maximum test pressure: 1 1/2 x maximum working pressure.
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Single & Double Externally Pressurized Expansion Joints
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Externally pressurized expansion joints are ideal for large axial movement applications.
Pressure is applied to the bellows external surface via a gap between the inner guide ring and outer pipe shell. The stabilizing effect of external pressure permits use of a longer bellows with larger movement capability than a comparable internally pressurized design.
The rugged construction fully encases the bellows, assuring a high level of safety and durability. A convenient drain port is included that allows removal of condensate and sediment in steam service applications.
How to order:
Example P/N |
| 2 |
HSX |
FF |
150 |
4 |
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SX And DX Data
| Size Range |
2" to 12" NPS* |
Allowable Pressure
Stainless Steel Bellows |
Vacuum to 300 psi |
Temperature Limits
Stainless Steel Bellows |
-20°F to 800°F ** |
| Axial Traverse |
To 8" (SX). . .
To 16" (DX). . . |
| Lateral Motion |
Up to 1 3/4" . . .
(depending on size) |
*For sizes larger than 12" consult factory for information.
**With special alloys, temperatures of minus 300°F. to plus 1600°F. can be handled. |
Materials of Construction
- Bellows
A 240-304
Other Materials Available
- Flanges
A-105/A516-70
2" thru 12" 150 lb.
& 300 lb.
R.F.S.O. B16.5
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- Pipe / Shell
A53/106 Gr. B
or A516-70
2" thru 10" Sch. 40
12"
Std. Wall .375" thk.
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- Rings
A285 GR. C or A516-70
- Anchor Base
Carbon Steel
(Standard on HDX)
- Drain, Vent Ports
Carbon Steel
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Expansion Compensators
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Here's the perfect way to absorb pipe motion in small diameter systems. High-pressure types permit 2" pipe motion - 1 3/4" compression and 1/4" extension. Senior Flexonics Pathway expansion compensators provide the lowest cost method to take up thermal growth.
Senior Flexonics Pathway compensators are externally pressurized as opposed to the standard internally pressurized models. The external pressurization principle eliminates the possibility of the bellows buckling, which is one of the major causes of compensator failure.
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How to order:
Example P/N
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| 1.25 |
HMT |
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