Case story

EXPANSION JOINTS FOR SEWERAGE SYSTEM

Sewerage system

United Kingdom

You may have seen it on the BBC news…
Back in 2015 the BBC aired a short documentary from the Lee tunnel, which is a part of London’s Thames water project. The aim of this project is to improve London’s sewerage system. HRH The Prince of Wales visited the tunnel to perform the official opening ceremony, marking the 150-year anniversary of the London sewerage system. But did you know that some of the Expansion Joints installed in the tunnel were designed and produced by Belman?

 

The Expansion Joints
Belman designed and manufactured 12 Universal Expansion Joints for this project, these were installed in the pipes carrying sewage from the underground tunnel to the above ground treatment plant. The Bellows are made from Inconel 625, while the flow liner and the flanges are made from 1.4404 stainless steel. The flow liners were designed with extra material thickness as the London sewage system still uses the Victorian brick lined tunnels in places, there was a concern that over time the lining of these tunnels could break away leading to the potential of the lining bricks being sucked up the pipes. The flow liners were designed to withstand direct impact from this foreign material. The tie rods support the Expansion Joint during installation as they were installed in large pre-fabricated pipe sections above ground then lowered down into the shaft.

 

Belman’s experience counts
Belman has a +25-year long tradition in the design and manufacture of Expansion Joints. The company has built a strong technical base with extensive references from many interesting and well-known projects such as this one in the Lee Tunnel.

 

Link to the BBC documentary
You can still see the Lee Tunnel documentary: Click here

DESIGN FEATURES

The Expansion Joints for the Lee Tunnel have the following design parameters:
Dimension: DN 100 – DN 1000 • Built-in length: 390 – 750 mm • Medium: Sewage • Design temperature: -7/+24°C • Design pressure: up to 25 barG • AX: +/-22 mm • LA: +/-1 mm • Bellow: Inconel 625 • Inner sleeve: 1.4404 • Flanges: 1.4404

CLIENT BENEFIT

  • Suitable solution for the application
  •  Tie rods added to support the Expansion Joint during installation as they were installed in large pre-fabricated pipe sections above ground then lowered down into the shaft.
  • Flow liners designed to withstand direct impact from foreign material that are a risk in the application
  • Controlled absorption of movements in the pipeline
  • Benefit from the considerable know-how of an experienced manufacturer
RELATED INFORMATION

TECHNICAL information

  • Technical information on Universal Expansion Joints in Expansion Joint Catalogue
    page 33
  • Technical information on Inner Sleeves in Expansion Joint Catalogue
    page 410 – 411

REFERENCES 

Cummins • Weinberger • International Silencers •
Norcem • Power Machines • Caterpillar • Bronswerk •
WMF Group • Lee Tunnel • Cementa • ESS • Rolls Royce •
Deutsche Bahn • Saline Water Conversion Cooporation (SWCC) • University of Oxford •
Egger Technologies •

TRUSTED CRAFTMANSHIP

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