Complex pressure piping

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Creative solutions for unique requirements

With a century of industry know-how and comprehensive solutions, Fives' Piping Solutions business line can satisfy even the most unconventional and highly technical requests.

Backed by this experience, it has been drawn to projects that require complex techniques and specialized codes in welding, assembly, engineering, metal and expertise.

Fives can work on steel and noble alloys that require specialized knowledge like 304H/321H stainless steel, nickel alloys (800HT, 825, 625), aluminum, duplex and super-duplex steels.

Custom-built products for one-of-a-kind projects

Among many other projects, Fives' Piping Solutions business line has built fume lines for Total in 304H/321H stainless steel and custom large-sized grates for Yara in 800H and 800HT nickel alloy.

Since Fives' Piping Solutions business line was founded, it has been building complex pressure vessels for exchangers and water boxes for EDF. 

For more than 25 years, it has also been designing machinery like spline[d] mixer exchangers for its customer Dow Chemical.

Fives and its Piping Solutions business line have worked together on nuclear contracts for new EPRs and next-generation thermal plants to provide:

the primary piping systems for EPR Olkiluoto 3, Flamanville 3, Taishan 1 and 2 for Areva,

piping systems and onsite installation of the test loop for the Areva JSPM EPR primary motor-driven pump units,

Inconel 82 buttering and butt-joining for containment openings in the EPR Flamanville 3 reactor building

high-pressure piping systems for next-generation thermal plants.

In an ongoing effort to maintain our employees' qualifications and skills, the business line has two training centers in  manual and automated welding at our facilities in Nancy  and Cherbourg,  France. 

The business line also has an industrial site in Nancy, a division specifically focused on development. This division features a modular floor design that can be moved around to simulate real-life environments and machinery footprints.

Fives’ Piping Solutions business line develops innovative welding processes for its customers that meet their special requirements. Some recent developments by our R&D teams:

  • automatic welding for valves located in high-radiation zones,
  • repairing blades in primary heat pumps,
  • TIG orbital narrow gap welding 

Fives and its Piping Solutions business line have 160 employees certified in welding  who can work on over 2,000 Welding Process Specifications (WPS)  and qualify for the standard international industrial codes (EN, ISO, RCC-M, RSE-M, ASME, AD-MERKBLATT, etc.). 

These WPSs cover a wide range of metal alloy grades: all low-alloy steels, high-alloy steels, P91 and P92 martensitic steels for thermal plants, ferrite/austenitic/austenitic-ferrite (dual-phase grade) stainless steels, nickel alloys, aluminum alloys, copper alloys and titanium alloys.

"What makes Fives Piping Solutions unique is it can meet highly specialized requests, either for the entire project or just part of it. Because of the resources and experience we have, we can offer very creative and comprehensive solutions for both products and services."

Alexandre Korbaa
Commercial Products Director

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