DX3S DanOne
metal expansion joints
DX3S DanOne
metal expansion joints
| Item | Description |
| 1 | Media/ line pipe |
| 2 | Bellows |
| 3 | Outer casing / shroud |
| 4 | Inner casing / shroud |
DX3S DanOne
metal expansion joints
Features
- Untied metal expansion joints mainly for district heating.
- External sealable shroud.
- Can be installed in series.
- One cycle / startup type expansion joint, for ease of installation.
- Designed for large axial movements.
Advantages
- No significant pressure drop - reduced need for pumps and general power consumption for moving media, compared to pipe loops.
- Less supporting structure or excavation required – Compared to pipe loops.
- Lower erosion rate (for abrasive media lines – compared to pipe loops with elbows).
- Multiply bellows with low spring rate and high cycle life.
Materials
- Bellows: 1.4541 (AISI 321)
- Connections: 1.0345 – (P235GH)
Other materials are available on request.
Standards and approvals
Design code:
EJMA, (4-5) Cycles
NDT and documentation:
Can be provided per customer request e.g.,
material certificates and NDT test reports.
EJMA, (4-5) Cycles
NDT and documentation:
Can be provided per customer request e.g.,
material certificates and NDT test reports.
Recommended applications
- Building services industry
- District heating & cooling
- Water cooling systems
- Air and steam transport lines
Notes
Custom designs and sizes are available on request. Untied metal expansion joints require guide and support. DX3S type expansion joints are used to ease installation by facilitating movement during the first startup. Once in operation, the expansion joint is fix (seal) welded.
Similar products
AN Type expansion joints
- Tied custom metal expansion joints for general pressure applications.
- Designed for, and cover the mid temperature and pressure range for general process equipment.
- Mainly for angular movements.
- Tied metal expansion joints retain pressure thrust developed by internal pressure, through the use of hardware.
AX Type expansion joints
- Untied custom metal expansion joints for general pressure applications.
- Designed to cover the mid temperature and pressure range for general process equipment.
- Mainly intended for axial movements.
- Multiply bellows with low spring rate and high cycle life.
CB Clamshell metal expansion joints
- Bellows or expansion joints split into longitudinal segments for installation without opening pipework.
- Temporary repair solution for damaged expansion joints.
- Can handle axial, lateral and angular movements.
- The permissible combination and magnitude of movements depends on the application and the existing expansion joint that is to be repaired.