Application: Water Mist Systems

Inside tunnel view of Samruddi Mahamarg Tunnel where PreFiS non-welded piping technology is used for water mist systems

Overcoming the Challenges of Welding in Subterranean Tunnels

Installing kilometres of high-pressure stainless-steel piping inside a confined tunnel environment presents unique challenges. Conventional welding can introduce risks related to material integrity, hot-work safety and post-weld quality requirements. This case study explores how a non-welded cold-press piping solution was used for the Samruddhi Mahamarg Tunnel's high-pressure water mist network, helping address these challenges while improving installation efficiency and reducing total installed cost.
Entrance of Samruddi Mahamarg Tunnel where PreFiS non-welded piping was used for the water mist system

PreFiS® Tubing for Samruddhi Mahamarg Tunnel

The Samruddhi Mahamarg Tunnel project demonstrates the application of PreFiS® non-welded press-fit technology in a high-pressure water mist fire protection system, operating at pressures of up to 140 bar across approximately 8 km of tunnel infrastructure.
Cenergy Offshore personnel installing pyplok for fire suppression system in Dwarka Expressway

Water Mist Piping for Dwarka Expressway Tunnel

Cenergy Offshore supplied PYPLOK® mechanical pipe joining technology for approximately 20 km of stainless-steel tubing in the Dwarka Expressway Tunnel’s high-pressure water mist fire suppression system, enabling faster installation while eliminating conventional welding and hot work.

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