Rubber Bellow Expansion Joints with DIN Flange

Rubber bellow expansion joints with DIN flanges are engineered to provide flexible connections in marine piping systems. Designed to absorb thermal expansion, mechanical vibration, and minor alignment deviations, these joints protect critical pipeline components from stress and premature failure. The rubber bellow construction ensures excellent flexibility and tight sealing, while the DIN flange ends allow for straightforward installation and secure connection to standard pipework.

Ideal for shipboard applications such as cooling water lines, fuel transfer systems, exhaust systems, and ballast handling, these expansion joints are built to withstand harsh marine environments. The rubber material is selected for its resistance to saltwater, oils, and temperature variations, ensuring long service life with minimal maintenance. Available in various sizes and pressure ratings to suit a wide range of vessel piping requirements.

Key Features

Technical Specifications

SpecificationValue
Product TypeRubber Bellow Expansion Joint
Flange StandardDIN 2576 (EN 1092-1)
Size RangeDN25 – DN600 (1" – 24")
Pressure RatingPN10 / PN16
Temperature Range-10°C to +100°C (14°F – 212°F)
Bellow MaterialEPDM, NBR, or Neoprene
Flange MaterialCarbon Steel (painted) or Stainless Steel 316L
ReinforcementPolyamide cord or stainless steel wire (optional)
ApplicationsCooling water, fuel oil, ballast, exhaust, and general seawater piping

Frequently Asked Questions

What sizes are available?

These expansion joints are available from DN25 to DN600, covering nominal bore sizes from 1 to 24 inches. Custom sizes may be produced on request by contacting our technical team.

Can these expansion joints be used in seawater applications?

Yes, the rubber bellow is available in EPDM or Neoprene compounds that provide excellent resistance to seawater and are specifically recommended for marine environments. For oil or fuel applications, NBR material should be selected.

Are the flanges drilled to DIN standard?

The flanges are manufactured to DIN 2576 (EN 1092-1) standard, ensuring a perfect match to standard PN10 or PN16 flange dimensions. Custom drilling patterns can also be accommodated upon request.

What is the maximum operating temperature and pressure?

Standard joints are rated up to PN16 and can operate within -10°C to +100°C. For higher pressures or extreme temperatures, reinforced options with stainless steel rings are available, but these should be confirmed based on your specific system requirements.

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