Examples of Common Types of Expansion Joints — The Expansion Joints Blog

Examples of Common Types of Expansion Joints

January 26th, 2011

Single tied expansion joint fabricated entirely of stainless steel for a pipeline in Alaska.Single Tied Expansion Joints for a Pipeline in Alaska

The expansion joint assemblies are fabricated entirely from stainless steel with a design pressure of 50 PSIG. They are designed with tie rods that do not permit axial movement, but allow for lateral movement up to 1/2″. The expansion joints will be used on a process line that contains exhaust gas and hydrocarbon vapor at a low concentration. It will connect an oil tank with a vapor control system.

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Universal metallic expansion joint with 300 lb. raised face stainless steel flanges.Universal Metallic Expansion Joints with 300 lb. Raised Face Stainless Steel Flanges

The expansion joint assemblies are fabricated for a 12″ pipe and are designed for 2-1/2″ lateral movement. The design pressure is 276 PSIG with a design temperature of 626°F. 316L stainless steel was used for the bellows and tie rods. The expansion joints include 300 lb. raised face stainless steel flanges to accommodate low spring rate requirements.

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Hinged expansion joints with refractory lining.Hinged Expansion Joints with Refractory Lining

Hinges cause the unit to bend in a single plane. The hinge mechanism is designed to accept the full pressure thrust.

  • Design Pressure: 75.4 PSIG
  • Design Temperature: 1400°F
  • 100% X-ray Tested
  • Pneumatically Tested weld seams to 83 PSIG

View Information on Hinged Expansion Joints

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Elbow pressure balanced expansion joints fabricated for a 36" pipe.Elbow Pressure Balanced Expansion Joints

The expansion joints are fabricated for a 36″ pipe and are designed with Inconel® 625 grade LCF bellows. They include a liner provided with drain holes to prevent accumulation of corrosive condensation.

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Inline pressure balanced expansion joints designed to balance 48,000 lb. of pressure thrust.Inline Pressure Balanced Expansion Joints

- Design: 125 PSIG, Temperature: 244°F

- 304 SS Bellows, Flanges & Liners

- Designed to Balance 48,000 lb. of Pressure Thrust

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Externally Pressurized Expansion JointsExternally Pressurized Expansion Joints

These expansion joints are fabricated for a piping system in a steam plant. They include 304 SS bellows and carbon steel shell and flanges, and are designed for 150 PSIG and 350°F.

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Gimbal expansion joint with floating rings designed for a 55" diameter overhead vapor line at a refinery.

Gimbal Expansion Joint with Floating Rings

These expansion joints are designed for a 55″ diameter overhead vapor line at a refinery. The overall length is 310″ and the bellows are fabricated from 625 LCF. The expansion joint is designed for 50 PSIG and 1075°F.

View Information on Gimbal Expansion Joints

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