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District Heating Expansion Joints

Ayvaz’s highly flexible metal bellowed expansion joints are designed to absorb large axial movements specially for installation in district heating pipe systems.

The axial forces in the pipeline are directly transferred through adjoining end surfaces of the pipes as to protect the bellows against overloading in cases that the bellows are fully compressed.

Movement Absorption

The highly flexible bellow of the compensator ensures absorption of large axial movements. The cover, optional guides and rings of the compensator contribute high stability. The cover likewise absorbs eventual misalignments in the pipeline, which can occur if the pipeline hangs a bit in the compensator. This should however be avoided.

Advantages of Ex-pressed Expansion Joints

• Absorption of large axial movements
• Pipeline protection
• Easy installation and insulation
• Protection against torsion

DESIGN

Structure
Bellow Material: Stainless Steel AISI 321 (Opt. 304, 316L, 316TI, 309)
Connection Types: Welded End
Connection Material: Carbon Steel St.37.2 as standard, the material can be customised on request
Cover Material: Carbon Steel St.37.2 as standard, the material can be customised on request

Operation Conditions
Operating Temperature -80°C/+600°C
Operating Pressure PN 16
Nominal Diameters DN 50 (2”) - DN1000 (40”)