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UNIVERSAL EXPANSION JOINTS

Universal Expansion Joints consist of two multi-convoluted bellows connected with an intermediate pipe into one assembly.

Belman has developed a series of Universal Expansion Joints that allows all three movements: axial, lateral and angular simultaneously.
The Universal Expansion Joints can be equipped with all kinds of end connections, like welding ends, welded or loose flanges, and an endless number of accessories such as inner sleeves, cover and movement controls.

 

Design range within Universal Expansion Joints

Belman Universal Expansion Joints can be designed within the range:

Dimensions

DIMENSIONS:
DN 15-12.000

Pressure

PRESSURE:
Up to 150 Barg (2176 psi)

Dimensions

TEMPERATURE:
-165°C to +1000°C

Materials_bellow_Symbol

MATERIALS:

Austenitic stainless steels, High alloys, Duplex, Titanium, Hastelloy,
Incoloy, Inconel, Alloy 59

Design_Codes_Symbol

DESIGN CODES:

EN 13445, EN 13480, EN 14917
ASME VIII, div.I, ASME B31.3
ASME B31.1, EJMA
and others on request

Test and Quality Control

TESTS:

Radiographic examination (X-ray), Helium leak testing, Pressure test, Air test, Dye penetrant test, Magnetic particle examination and many more

UNIVERSAL EXPANSION JOINT

PRODUCT RANGE

UNIVERSAL
with
Loose Flanges

UN2BU / ID no. 51
DN 50 – 2200
PN 2,5

UNIVERSAL
with
WELDED FLANGES

UN2FU / ID no. 52
DN 50 – 2200
PN 2,5

UNIVERSAL
with
welding ENDS

UN2SU / ID no. 53
DN 50 – 2200
PN 2,5

CUSTOMISED
UNIVERSAL
EXPANSION JOINTS

Belman expertly engineer customised Universal Expansion Joint solutions

Customised
UNIVERSAL EXPANSION JOINTS
CUSTOMISED UNIVERSAL EXPANSION JOINTS

CASE STORY

Not only do these Expansion Joint have a large diameter, and abosrb both axial and lateral movements in combination. These Expansion joints are also 8 meter long and made according to demanding requirements, as they are installed in a Nuclear Power plant.

UNIVERSAL EXPANSION JOINTS

TECHNICAL DESCRIPTION

APPLICATIONS

Universal Expansion Joints can absorb movements in all directions, and are used in uncritical, low pressure installations like ventilation ducts, exhaust gas systems, fresh air ventilation and process equipment.

ADVANTAGES & REQUIREMENTS

Universal Expansion Joints represents several advantages for the piping designers, thus they also set some requirements for the installation. These can be seen here along with more facts about Universal Expansion Joints:

Advantages

What are the advantages of using
Universal Expansion Joints?

  • Absorb movements in all directions
  • Absorption of large axial movements and lateral movements in one expansion joint (Universal expansion joints)
  • Can be modified to suit existing installation gap
REQUIREMENTs

What are the requirements for using
Universal Expansion Joints?

  • Only for low pressure applications
  • Fix points and good guides are required
  • Many fix points and guides are needed for long pipe sections

UNIVERSAL MOVEMENT

The Universal Expansion Joints allow a large amount of lateral offset in multiple planes, and the lateral deflection can be increased or decreased by changing the length of the intermediate pipe. Universal Expansion Joints do not use tie rods, and are therefore suitable only for low pressure applications. Fix points and guides must be sufficiently designed to withstand the full pressure thrust forces and other loads. Universal Expansion Joints is not to be confused with Lateral Expansion Joints.

Definitions
Movement is shown as AX (axial), LA (lateral), AN (angular) mm + deg. The parallel displacement is indicated as negative (-) and positive (+) respectively. It is very important to notice if the movements is stated in combination (universal), or as an alternatively combination of the different directions.

Example
The elongation of the Bellow is +10 and the compression of the bellow is -20. This will be shown as: +10/-20 mm. Equal parallel displacement is shown as: +/-20 mm.

Pipe Work Guidelines

INSTALLATION EXAMPLES

pipe expansion joints

Universal expansion joint to absorb lateral movement

Shows a tied universal expansion joint used to absorb lateral deflection in a single plane “Z” bend. Where dimensionally feasible, the expansion joint should be designed to fill the entire offset leg so that its expansion is absorbed within the tie rods as axial movement.

The tie rod should be extended to the elbow centre line when practical. The thermal movement of the horizontal lines is absorbed as lateral deflection by the expansion joint.

Only directional guiding is required since the compressive loading on the pipe consists only of the force necessary to deflect the expansion joint. Any thermal expansion of the offset leg external to the tie rods, such as that part of the elbows at either end, must be absorbed by bending of the horizontal pipe legs.

Provisions should be made in the design of the guides to allow for both this deflection and the reduced length of the expansion joint in its deflected position.

pipe Expansion joints

Universal expansion joint in “Z” bend

Shows a typical application of a tied universal expansion joint in a three plane “Z” bend.
Since the universal expansion joint can absorb lateral deflection in any direction, the two horizontal piping legs may lie at any angle in the horizontal plane.

GET MORE INSTALLATION EXAMPLES

UNIVERSAL EXPANSION JOINTS

INFORMATION & TOOLS

To ease the work with Expansion Joints for everyone being involved with Expansion Joints
Belman provides here useful Engineering tools and further technical information.

DOWNLOAD CENTER

Here you can download useful technical information and further materials related to Expansion Joints such as:

  • Guide & Catalgoue
  • Product brochures
  • Look Books showing design options
  • Data sheets
MORE INFORMATION

About Universal Expansion Joints
on pages 23, 33, 307-317
in the Belman
Expansion Joint Catalogue

BELMAN ACADEMY

In Belman Academy we help you increase your knowledge on Expansion Joints and get tips and tools that will ease your work with Expansion Joints, such as:

  • Technical articles and videothek
  • How to guides
  • Technical tutorial videos
  • Trainings (video, live)
INSTALLATION

On installation of
Universal Expansion Joints
in the Belman installation instruction

TRUSTED CRAFTMANSHIP
ENGINEERED EXPANSION JOINTS
Since 1994
EXPERTLY FINDING THE RIGHT SOLUTION

LATEST PROJECTS & REFERENCES

Belman expertly engineer the optimum flexible solution to absorb movements in the pipe system as well as ensuring smooth operation and solutions to any operational issues for the clients. By customising as well as optimising the flexible solution Belman supply Expansion Joint solutions providing a better TCO (total cost of ownership). See some latest projects and references here.

REASONS TO DO BUSINESS WITH US
HIGH QUALITY
CUSTOMISED SOLUTIONS
DOCUMENTATION
ON-TIME DELIVERY
SHORT DELIVERY TIME
FAST RESPONSE

 

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