ELBOW PRESSURE BALANCED
EXPANSION JOINTS

Elbow pressure balanced expansion joints or corner relief expansion joints are the types of pressure balanced expansion joints which are used where pressure thrust forces on equipment or piping is unacceptable and the direction of the pipe system also changes. In order to understand the primary advantage of an elbow pressurised unit, it’s important to understand how an ordinary expansion joint influences the pipe system, in which it is installed.
When a pipe system with an ordinary axial expansion joint installed is pressurised, the pressure reaction force as well as the force needed to move the expansion joint is transmitted to the pipe system. The pressure thrust force can be considerable, generating high demands and stresses on the guides and fix points used for supporting/fixing the pipe system.

By installing a pressure balanced expansion joint, the pressure thrust force is balanced internally within the expansion joint and only the spring rate force, which is needed to move the expansion joint is transmitted to the pipe system.
This reduces the load acting on the guides/fix points, which further reduces the need for supporting structures. This enables the use of lighter guides that can deliver significant savings, especially where structural and foundation work is impractical. This feature makes the elbow pressure balanced expansion joint the preferred choice for pipe systems, where pressure thrust loads acting on flanges and/or connected equipment such as turbines is avoided.

DIMENSIONS & DESIGN

The corner relief expansion joints are customised solutions designed to fit the application.
They are available in all designs, all sizes and all materials.

ELBOW PRESSURE BALANCED EXPANSION JOINT PROJECTS

100 % STAINLESS STEEL

Chemical plant, Turkey

IDENTICAL EXPANSION JOINTS

Geothermal Power Plant, Kenya

100 % STAINLESS STEEL

Chemical plant, Turkey

IDENTICAL EXPANSION JOINTS

Geothermal Power Plant, Kenya

100% 254 SMO

Oil platform, the Caspian Sea

SPECIAL DESIGN

Fertilizer manufacturer, Holland

100% 254 SMO

Oil platform, the Caspian Sea

SPECIAL DESIGN

Fertilizer manufacturer, Holland

EXCELLENCE IN

ELBOW PRESSURE BALANCED EXPANSION JOINT
ENGINEERING

Belman elbow expansion joint

ADVANTAGES

  • Reduces / eliminates costs for fix points
  • Balance the system
  • Reduces piping costs
  • Reduces external loads on connected equipment.

APPLICATION

Elbow pressure balanced expansion joints are used in pipelines with a change of direction. They are used with low pressure turbines, with condensers and also with pumps and other equipment, that may be susceptible to pressure loads.

Other types of pressure balanced
PRESSURE BALANCED EXPANSION JOINTS

Pressure balanced expansion joints are used where pressure thrust forces on equipment or piping is unacceptable and in pipelines where the direction of the pipe system does
not change.

Other types of pressure balanced
PRESSURE BALANCED – COMPACT DESIGN

Pressure balanced expansion joints are expansion joints incorporating a balancing chamber. This creates a balancing pressure thrust, which opposes the internal pressure thrust force from the flow bellows.

In many applications, the design parameters lead to the requirement for a customised expansion joint type. This can be especially challenging when the desired expansion joint type requires more space than the pipe system dimensions permit. This can sometimes be resolved by the use of a pressure balanced expansion joint with a compact design and a hidden balance chamber.

Other types of pressure balanced
PRESSURE BALANCED – COMPACT DESIGN

Pressure balanced expansion joints are expansion joints incorporating a balancing chamber. This creates a balancing pressure thrust, which opposes the internal pressure thrust force from the flow bellows.

In many applications, the design parameters lead to the requirement for a customised expansion joint type. This can be especially challenging when the desired expansion joint type requires more space than the pipe system dimensions permit. This can sometimes be resolved by the use of a pressure balanced expansion joint with a compact design and a hidden balance chamber.

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