LATERAL EXPANSION JOINTS

Lateral expansion joints are used to absorb lateral deflection. Lateral expansion joints can move in all lateral directions simultaneously for absorbing expansion from two pipe sections in different directions. The lateral expansion joint is normally equipped with fixtures such as external tie rods, which allow the unit to absorb movements in all lateral directions but also to absorb the pressure thrust (incl. full vacuum).

DIMENSIONS

Belman design and manufacture a wide range of lateral expansion joints.

Customised solutions
As customised solutions joints lateral expansion joints are available in all sizes up to DN 12.000, all designs and all materials.

Standard solutions
As standard solutions axial expansion joints are available in size range DN 50 – 2000.

LATERAL EXPANSION JOINT TYPES

produkt1
LATERAL
with loose flanges and tie rods

LA1BT / ID no. 71
DN 50-500
PN 6-25
Download (PDF)

produkt1-2
LATERAL
with welded flanges and tie rods

LA1FT / ID no. 72
DN 50-500
PN 6-25
Download (PDF)

produkt2
LATERAL
with welding ends and tie rods

LA1ST / ID no. 73
DN 50-500
PN 6-63
Download (PDF)

produkt3
LATERAL
with loose flanges and tie rods

LA2BT / ID no. 81
DN 50-500
PN 6-25
Download (PDF)

produkt4
LATERAL
with welded flanges and tie rods

LA2FT / ID no. 84
DN 50-500
PN 6-25
Download (PDF)

produkt5
LATERAL
with welding ends and tie rods

LA2ST / ID no. 87
DN 50-500
PN 6-63
Download (PDF)

produkt6
LATERAL
with welding ends and hinges

LA2SH / ID no. 88
DN 250-2000
PN 6-63
Download (PDF)

produkt7
LATERAL
with welding ends and gimbal

LA2SK / ID no. 89
DN 250-2000
PN 6-63
Download (PDF)

Expansion joint

CATALOGUE

Comprehensive technical data and selection criteria for +3500 standard metallic expansion joints.

CUSTOMISED LATERAL EXPANSION JOINTS

VARIOUS SIZES AND DESIGNS

Power plant, Sweden

TANK FARM BELLOWS

Oil refinery, Holland

VARIOUS SIZES AND DESIGNS

Power plant, Sweden

TANK FARM BELLOWS

Oil refinery, Holland

REFRACTORY LINED

Steel plant, Germany

1500 MM LONG LATERAL EXPANSION JOINTS

District heating, Sweden

REFRACTORY LINED

Steel plant, Germany

1500 MM LONG LATERAL EXPANSION JOINTS

District heating, Sweden

TECHNICAL DESCRIPTION

The lateral expansion joints are available with one or two bellows (universal type) as well as with a number of end connections like welding ends, flanges and/or a combination thereof. Additionally, it can be equipped with accessories like: inner sleeves, covers,
intermediate pipe and tie rods.

The type of expansion joint selected depends on both its cost effectiveness and its suitability for the function to be fulfilled. The economic consideration should not only take into account the cost of the expansion joints, but also the required fix points, guides and structures.

Lateral movement

Lateral movement is a sideways (lateral) displacement of the ends of the expansion joint in a direction perpendicular to its longitudinal axis. Lateral movement can be absorbed both in the horizontal and the vertical axis/direction according to the design of the pipe system. Lateral movement can, to a limited degree, be absorbed by one bellow. If larger movements are to be absorbed, we recommend a design with a universal expansion joint (two bellows with an intermediate pipe) absorbing the movement and this also results in lower offset forces.

Definitions

Lateral movement is shown as LA and stated in mm. The parallel displacement is indicated as
negative (-) and positive (+).

Example

The elongation of one side of the bellow is +10 and the compression of the other side of the bellow is -20. This will be shown as: LA +10/-20 mm. Equal parallel displacement is shown as: LA +/-20 mm (2λN).

APPLICATION

As lateral expansion joints absorb movements in lateral directions in one or more planes, and absorb adjusting forces, they are widely used in more complex pipe systems with many different directions and levels.
Lateral expansion joints make possible the absorption of movements which are perpendicular to the longitudinal direction of the pipeline, and are therefore ideal for installation in pipe systems with bends, Z shaped pipe systems and in 3 hinged systems.

Lateral expansion joints can be used as tank settlement bellows, vibration absorbers and in all pipe systems with bends or a change in the pipe direction.

ADVANTAGES & REQUIREMENTS

Advantages

  • Absorbs movements in all lateral directions
  • Absorption of large lateral movements with only one lateral expansion joint
  • Reduced loads on all fix points as the tie rods absorb the loads without transferring pressure thrust on to the fix points

Requirements

  • For absorption of large expansions several lateral expansion joints are needed
  • Many fix points and guides are needed for long pipe sections

PIPE WORK GUIDELINES

INSTALLATION EXAMPLES

Expansion joint installed in the short piping leg

The configuration is an alternative arrangement in which the expansion joint is installed in the short piping leg and the principal expansion is absorbed as lateral deflection.
The longer piping leg is free of compressive pressure loading and requires only fix points and a guide (Gn).

Tie rods to prevent axial movement

A piping configuration that permits the use of adapted tie rods to prevent axial movement frequently simplifies and reduces the cost of the installation.
Due to the tie rods, the expansion joint is incapable of absorbing any axial movement other than its own thermal expansion. The thermal expansion of the piping in the shorter leg is, as
a result, imposed as deflection on the longer piping leg. Where the longer piping leg is not sufficiently flexible and where the dimension of the shorter leg is suitable, tie rods may be installed spanning the entire short leg so that no deflection is imposed on the longer run from its source.

Our experience, your benefit
CUSTOMISED
EXPANSION JOINTS!
If the required/specified expansion joint is not found in our standard product range, please do not hesitate to forward your specifications to us. We are specialised in designing and manufacturing of cost-efficient customised solutions.
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