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Externally Pressurized (X-Flex) Pipe Expansion Joint

Externally pressurized pipe expansion joints, also known as x-flex expansion joints, are suited for piping systems that require large amounts of axial compression or extension. In externally pressurized pipe expansion joints, the bellows elements are arranged so that the media flow is on the external surface of the bellows. Externally pressurizing the bellows eliminates pressure instability as a limitation to the design and permits the absorption of large amounts of axial expansion.

 View PDF

Notes:

  1. Rated life cycle at 650°F is 1000 cycles for full rated movement shown above.
  2. To increase cycle life or movements, please refer to graph on cycle life.
  3. Expansion joint is capable of taking 10% of rated movement as extension, with remaining 90% as axial compression.
  4. Maximum test pressure: 1.5 X rated working pressure.
  5. Bellows rated for 650°F: See catalog flange data for appropriate flange temperature/pressure ratings.
  6. Maximum installation misalignment is ±1/4-inch axial and ±1/16-inch lateral.
SizeAxial

Movement
Spring

Rate
Overall LengthWeightEffective AreaShell Outside DiameterAnchor Foot HeightAnchor Foot Type
Flanged

Ends
Weld

Ends
in.lb./in.in.lb.lb.in. 2in.in.
mmkg/mmmmkgkgkg/cm 2mmmm
3414024816530.248.625Please
consult
factory
regarding
anchor
foot
usage
on single
X-flex
1022.56103730195.05219
8704012010430.248.625
2031.310165547195.05219
4414025946830.248.625
1022.56354331195.05219
8704213010430.248.625
2031.310675947195.05219
543282815312353.8510.75
1025.97117056347.33273
81644622619653.8510.75
2032.9116810389347.33273
643282816312553.8510.75
1025.97117457347.33273
81644624020253.8510.75
2032.9116810992347.33273
844032824318387.0914
1027.271111083561.73356
82104433227287.0914
2033.8111815112439.59356
10450229224138128.2816
10297371026358.31406
826245425339128.2816
2034.7114319315458.31406

Materials
Bellows: A240-T304. Alternate materials available upon request. Refer to the materials section.
Flanges: ASTM A105.
50 lb. ANSI B16.5 RFSO.
Pipe: ASTM A53/A106. .
Shell: ASTM A53/A106; API-5L
Rings: ASTM A285-C.

View PDF

Notes:

  1. Rated life cycle at 650°F is 1000 cycles for full rated movement shown above.
  2. To increase cycle life or movements, please refer to graph on cycle life.
  3. Expansion joint is capable of taking 10% of rated movement as extension, with remaining 90% as axial compression.
  4. Maximum test pressure: 1.5 X rated working pressure.
  5. Bellows rated for 650°F: See catalog flange data for appropriate flange temperature/pressure ratings.
  6. Maximum installation misalignment is ±1/4-inch axial and ±1/16-inch lateral.
SizeAxial

Movement
Spring

Rate
Overall LengthWeightEffective AreaShell Outside DiameterAnchor Foot HeightAnchor Foot Type
Flanged

Ends
Weld

Ends
in.lb./in.in.lb.lb.in. 2in.in.
mmkg/mmmmkgkgkg/cm 2mmmm
12492230436308180.8118Please
consult
factory
regarding
anchor
foot
usage
on single
X-flex
10216.576219814082.19457
846149611483180.8118
20382124527822082.19457
144101030516336211.8320
10218.176223515396.29508
850549711531211.8320
2039124532324196.29508
16496230610414270.224
10217.2762277188122.82610
848148810614270.224
2038.61219368279122.82610
184108030661401331.6124
10219.3762300182150.73610
854048877617331.6124
2039.71219399280150.73610
204119631985685399.3130
10221.4787448311181.5762
8598491240910399.3130
20310.71245564413181.5762
2441430321074634553.5530
10225.6813488288251.61762
8725501304864553.5530
203131270593393251.61762

Materials
Bellows: A240-T304. Alternate materials available upon request. Refer to the materials section.
Flanges: ASTM A105.
150 lb. ANSI B16.5 RFSO.
Pipe: ASTM A53/A106.
Shell: ASTM A53/A106; API-5L.
Rings: ASTM A285-C.

View PDF

Notes:

  1. Rated life cycle at 650°F is 1000 cycles for full rated movement shown above.
  2. To increase cycle life or movements, please refer to graph on cycle life.
  3. Expansion joint is capable of taking 10% of rated movement as extension, with remaining 90% as axial compression.
  4. Maximum test pressure: 1.5 X rated working pressure.
  5. Bellows rated for 650°F: See catalog flange data for appropriate flange temperature/pressure ratings.
  6. Maximum installation misalignment is ±1/4-inch axial and ±1/16-inch lateral.
SizeAxial

Movement
Spring

Rate
Overall LengthWeightEffective AreaShell Outside DiameterAnchor Foot HeightAnchor Foot Type
Flanged


Ends
Weld

Ends
in.lb./in.in.lb.lb.in. 2in.in.
mmkg/mmmmkgkgkg/cm 2mmmm
3428024946830.248.625Please
consult
factory
regarding
anchor
foot
usage
on single
X-flex
10256104330.9113.83219
81404013611030.428.625
2032.51016625013.83219
44280251157130.428.625
10256355232.2713.83219
81404215411030.428.625
2032.51067705013.83219
546622818613054.2410.75
10211.87118559.0924.65273
83314626621054.2410.75
2035.9116812195.4524.65273
646622821013254.2410.75
10211.8711956024.65273
83314629421654.2410.75
2035.9116813498.1824.65273
848102819130787.5814
10214.571187139.5539.81356
84234440328787.5814
2037.61118183130.4539.81356
10493129408246128.8816
10216.773718511258.58406
850445527365128.8816
2039114324016658.58406

Materials
Bellows: A240-T304. Alternate materials available upon request. Refer to the materials section.
Flanges: ASTM A105.
300 lb. ANSI B16.5 RFSO.
Pipe: ASTM A53/A106.
Shell: ASTM A53/A106; API-5L.
Rings: ASTM A285-C.

View PDF

Notes:

  1. Rated life cycle at 650°F is 1000 cycles for full rated movement shown above.
  2. To increase cycle life or movements, please refer to graph on cycle life.
  3. Expansion joint is capable of taking 10% of rated movement as extension, with remaining 90% as axial compression.
  4. Maximum test pressure: 1.5 X rated working pressure.
  5. Bellows rated for 650°F: See catalog flange data for appropriate flange temperature/pressure ratings.
  6. Maximum installation misalignment is ±1/4-inch axial and ±1/16-inch lateral.
SizeAxial

Movement
Spring

Rate
Overall LengthWeightEffective AreaShell Outside DiameterAnchor Foot HeightAnchor Foot Type
Flanged

Ends
Weld

Ends
in.lb./in.in.lb.lb.in. 2in.in.
mmkg/mmmmkgkgkg/cm 2mmmm
124185430563333181.9618Please
consult
factory
regarding
anchor
foot
usage
on single
X-flex
10233.2762256151.3682.71457
892749763533181.9618
20316.61245347242.2782.71457
144202830695365213.0720
10236.3762316165.9196.85508
8101449919589213.0720
20318.11245418267.7396.85508
164177030836456271.624
10231.7762380207.27123.45610
8885481078698271.624
20315.81219490317.27123.45610
184198626948448333.1624
10235.5660431203.64151.44610
8993301211711333.1624
20317.8762550323.18151.44610
2042200311338708401.0130
10239.4787608322182.28762
811004916451015401.0130
20319.71245748461182.28762
2442630321594644555.5530
10247.1813725293252.52762
81315501936986555.5530
20323.51270880448252.52762

Materials
Bellows: A240-T304. Alternate materials available upon request. Refer to the materials section.
Flanges: ASTM A105.
300 lb ANSI B16.5 RFSO.
Pipe: ASTM A53/A106
Shell: ASTM A53/A106; API-5L
Rings: ASTM A285-C.

View PDF

Notes:

  1. Rated life cycle at 650°F is 1000 cycles for full rated movement shown above.
  2. To increase cycle life or movements, please refer to graph on cycle life.
  3. Expansion joint is capable of taking 10% of rated movement as extension, with remaining 90% as axial compression.
  4. Maximum test pressure: 1.5 X rated working pressure.
  5. Bellows rated for 650°F: See catalog flange data for appropriate flange temperature/pressure ratings.
  6. Maximum installation misalignment is ±1/4-inch axial and ±1/16-inch lateral.
SizeAxial

Movement
Spring

Rate
Overall LengthWeightEffective AreaShell Outside DiameterAnchor Foot HeightAnchor Foot Type
Flanged

Ends
Weld

Ends
in.lb./in.in.lb.lb.in. 2in.in.
mmkg/mmmmkgkgkg/cm 2mmmm
341404014012430.248.6257.313A
2032.510166456195.05219186
16707322020430.248.6257.313
4061.3185410093195.05219186
481404115512930.248.6258.313A
2032.510417059195.05219211
16707424121530.248.6258.313
4061.3188011098195.05219211
583124525722753.8510.759.375B
2035.61143117103347.33273238
161568240137153.8510.759.375
4062.82083182169347.33273238
683284526223253.8510.759.375B
2035.91143119105347.33273238
161648241838853.8510.759.375
4062.92083190176347.33273238
884034541235287.091411C
2037.21143187160561.73356279
162107759153187.091411
4063.8195626924139.59356279
10850248519433128.281612C
2039121923619758.31406305
1626280738652128.281612
4064.7203233529658.31406305

Materials
Bellows: A240-T304. Alternate materials available upon request. Refer to the materials section.
Flanges: ASTM A105.
150 lb ANSI B16.5 RFSO.
Pipe: ASTM A53/A106.
Shell: ASTM A53/A106; API-5L
Rings: ASTM A285-C.

View PDF

Notes:

  1. Rated life cycle at 650°F is 1000 cycles for full rated movement shown above.
  2. To increase cycle life or movements, please refer to graph on cycle life.
  3. Expansion joint is capable of taking 10% of rated movement as extension, with remaining 90% as axial compression.
  4. Maximum test pressure: 1.5 X rated working pressure.
  5. Bellows rated for 650°F: See catalog flange data for appropriate flange temperature/pressure ratings.
  6. Maximum installation misalignment is ±1/4-inch axial and ±1/16-inch lateral.
SizeAxialSpring

Rate
Overall LengthWeightEffective AreaShell Outside DiameterAnchor Foot HeightAnchor Foot Type
MovementFlanged

Ends
Weld

Ends
in.lb./in.in.lb.lb.in. 2in.in.
mmkg/mmmmkgkgkg/cm 2mmmm
12892249691563180.811813C
20316.5124531425682.19457330
16461871041913180.811813
4068.2221047341582.19457330
148101049792612211.832014C
20318.1124536027896.29508356
165058711801000211.832014
4069221053645596.29508356
16896247950754270.22416D
20317.21194432343122.82610406
164818313581162270.22416
4068.82108617528122.82610406
1881080471002742331.612416D
20319.31194455337150.73610406
165408314331173331.612416
4069.72108651533150.73610406
20811964914351105399.313019D
20321.41245652502181.5762483
165988519471617399.313019
40610.72159885735181.5762483
24814305014631023533.553019D
20325.61270665465251.61762483
167258620251585553.553019
406132184920720251.61762483

Materials
Bellows: A240-T304. Alternate materials available upon request. Refer to the materials section.
Flanges: ASTM A105.
150 lb ANSI B16.5 RFSO.
Pipe: ASTM A53/A106.
Shell: ASTM A53/A106; API-5L
Rings: ASTM A285-C

View PDF

Notes:

  1. Rated life cycle at 650°F is 1000 cycles for full rated movement shown above.
  2. To increase cycle life or movements, please refer to graph on cycle life.
  3. Expansion joint is capable of taking 10% of rated movement as extension, with remaining 90% as axial compression.
  4. Maximum test pressure: 1.5 X rated working pressure.
  5. Bellows rated for 650°F: See catalog flange data for appropriate flange temperature/pressure ratings.
  6. Maximum installation misalignment is ±1/4-inch axial and ±1/16-inch lateral.
SizeAxial

Movement
Spring

Rate
Overall LengthWeightEffective AreaShell Outside DiameterAnchor Foot HeightAnchor Foot Type
Flanged

Ends
Weld

Ends
in.lb./in.in.lb.lb.in. 2in.in.
mmkg/mmmmkgkgkg/cm 2mmmm
382804015613030.428.6257.313A
203510167159.0913.83219186
161407324221630.428.6257.313
4062.5184511098.1813.83219186
482804117913530.428.6258.313A
203510418161.3613.83219211
161407427122730.428.6258.313
4062.51880123103.1613.83219211
586624529724154.2410.759.375B
20311.81143135109.5524.65273238
163318245740154.2410.759.375
4065.92083208182.2724.65273238
686624532424654.2410.759.375B
20311.81143147111.8224.65273238
163318249441654.2410.759.375
4065.92083226189.0924.65273238
888104548436887.581411C
20314.51143220167.2739.81356279
164237767756187.581411
4067.6195630825539.81356279
10893148629467128.881612C
20316.7121928621258.58406305
1650480867705128.881612
4069203239432058.58406305

Materials
Bellows: A240-T304. Alternate materials available upon request. Refer to the materials section.
Flanges: ASTM A105.
300 lb. ANSI B16.5 RFSO.
Pipe: ASTM A53/A106.
Shell: ASTM A53/A106; API-5L
Rings: ASTM A285-C.

View PDF

Notes:

  1. Rated life cycle at 650°F is 1000 cycles for full rated movement shown above.
  2. To increase cycle life or movements, please refer to graph on cycle life.
  3. Expansion joint is capable of taking 10% of rated movement as extension, with remaining 90% as axial compression.
  4. Maximum test pressure: 1.5 X rated working pressure.
  5. Bellows rated for 650°F: See catalog flange data for appropriate flange temperature/pressure ratings.
  6. Maximum installation misalignment is ±1/4-inch axial and ±1/16-inch lateral.
SizeAxial

Movement
Spring

Rate
Overall LengthWeightEffective AreaShell Outside DiameterAnchor Foot HeightAnchor Foot Type
Flanged

Ends
Weld

Ends
in.lb./in.in.lb.lb.in. 2in.in.
mmkg/mmmmkgkgkg/cm 2mmmm
124185449843613181.961813C
10233.2124538327982.71457330
169278712431013181.961813
40616.6221056546082.71457330
1482028491000670213.072014C
20336.3124545530596.85508356
1610148714461116213.072014
40618.1221065750796.85508356
1681770471217837271.62416D
20331.71194553381123.45610406
168858317101330271.62416
40615.82108777605123.45610406
1881986471335835333.162416D
20335.51194607380151.44610406
169938318611361333.162416
40617.82108846619151.44610406
20822004918411211401.013019D
20339.41245837550182.28762483
1611008524581828401.013019
40619.721591117831182.28762483
24826305020951145555.553019D
20347.11270952520252.52762483
1613158627781828555.553019
40623.521841263831252.52762483

Materials
Bellows: A240-T304. Alternate materials available upon request. Refer to the materials section.
Flanges: ASTM A105.
300 lb ANSI B16.5 RFSO.
Pipe: ASTM A53/A106.
Shell: ASTM A53/A106; API-5L.
Rings: ASTM A285-C.



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