Large Diameter Couplings

  • Couplings can absorb up to 10mm expansion and contraction,flange adaptors up to 5mm which allows for movement on bridge crossings, in chambers and pump stations. Often eliminates the need for special expansion joints.
  • The standard finish for all Viking Johnson products is black Rilsan Nylon 11, which is highly resistant to impact, corrosion, abrasion and chemical attack. However, other coatings such as shopcoat, hot dip galvanising, zinc spray and epoxy coating can be supplied as required.
  • Flange adaptors are often used to permit dismantling of valves in flanged pipe systems.
  • Couplings can offer up to 6° of angular deflection, flange adaptors 3° - to allow for the connection of misaligned pipes; take up ground settlement at structures; lay pipes to large radius bends.
Pipe Materials
Steel Ductile Iron Cast Iron Stainless Steel PVC HEP30 Asbestos Cement Concrete ABS
Water Gas Industrial

1 Simple to Fit

Simple installation in any weather and trench conditions,even underwater!

2 Long Life Expectancy

Elastomeric sealing gaskets are designed to have at least a 50 year lifespan

3 Corrosion Protection

Metal components are coated with Rilsan Nylon 11 which is WRAS approved for use with potable water. The nuts and bolts are Sheraplex coated to WIS 4-52-03, offering long term protection against corrosion, impact and abrasion to ensure continued reliable protection to corrosion, impact and abrasion and therefore ensures continued reliable performance.

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    Large Diameter Brochure

    Fittings to Suit any Pipe Specification


Data Sheets

  • 1. Large Diameter Couplings OD355.6 to 2038 Datasheet Download > (PDF)
  • 2. Large Diameter Online Enquiry / Order Form

    Complete this online form fillable PDF. Press send and save once complete to assist with a quotation for Large Diameter products.

    Download > (PDF)

Fitting Instructions

  • large diameter iom 1119 Large Diameter Dedicated Couplings Installation
  • video Large Diameter Couplings Install Video mp4
  • video Large Diameter Couplings Install Video wmv

General Videos

  • Viking Johnson Multi Million Pound Investment
    Crane BS&U has completed a multi-million pound investment in its Viking Johnson factory at Hitchin that will strengthen its business model to deliver enhanced customer benefits in terms of 'Best in Class' service and products. The investment has supported the creation of an entire linked value stream from the supply of raw materials through to the final manufacture of the products resulting in vastly improved lead times, product availability and plant flexibility.
    View the Video

  • Large Diameter Couplings Installation Guide
    A step by step guide showing the correct way to install a large diameter coupling onto pipework to ensure an effective and long lasting joint. Viking Johnson Large Diameter couplings are the ideal solution for a variety of large scale infrastructure projects including desalination plants and mining applications.
    View the Video

CAD Drawings

ZIP files contain DWG, DXF, IGS, STP & PDF file types. ST = Steel or Coated Steel. DI = Ductile Iron