Friction welding

Friction welding


Friction welding technology is used by asset integrity teams both subsea and topside to repair structures, equipment laydown fastening and perform anode retrofits at a reduced cost and with improved efficiency.

Proserv are the market leaders in friction welding, a solid-state welding process that was developed in the Soviet Union in 1956. Proserv, through acquisitions, have provided portable friction welding technology since the 1980’s building a strong track record of diverse applications across the globe.

Friction welding offers significant cost and operational efficiencies over traditional methods and has become an essential part of many asset owners integrity management programmes.

We provide portable friction welding technology which can be used onshore, offshore and subsea for a wide range of applications. Being a technology-driven company means we can provide either a standard product or a bespoke solution for your application to ensure quality, reliability and maximum efficiency.


  • Structural upgrades – pipe support, handrail attachment, blast wall upgrade
  • Cathodic protection – installation of sacrificial anodes
  • Earthing continuity – installation of supplementary earthing straps and boss connections
  • Plug welding for leak repair
  • Military applications – attachment of armour plating and control panel mounting points
  • Suitable for structural upgrades & repairs, subsea remediation work, anode & nipple attachment and corrosion prevention


  • Excellent fatigue life performance of stud welds
  • Subsea anode retrofit using friction welding is 50% lower in cost than impressed-cathodic protection retrofit
  • Welding can be performed in Zone 2 Areas without the require to build habitats
  • Typically 45% lower in cost than electric arc welding
  • No stray currents that could damage electrical equipment and control system
  • Prevents equipment having to be disconnected or removed
  • The process is quick and highly repeatable
  • A fully ROV installed galvanic anode retrofit solution
  • Ability to retrofit discrete sacrificial anodes to in service FPSO hulls
  • Friction welds are higher strength than other means of joining
  • Extremely low resistance characteristics
  • Minimal detrimental effect to the structural integrity of the parent material
  • Environmentally friendly process – no objectionable smoke, fumes or gases, or weld spatter, hence extremely safe conditions
  • Autogenic – no filler material used, the process solely relies on inter-molecular bonding with the original material
  • Dissimilar metals can be joined with no alloying of the metals

Types of system

  • Pneumatic powered system
    • Designed for use topside on or around platforms, decks of vessels and subsea up to 40m water depth.
    • This system has a proven track record of welding large numbers of studs in the field up to M16.
  • Electro hydraulic powered system
    • Designed to weld studs up to 25mm in diameter.
    • This system can be used topside or subsea.
    • The subsea configuration can be changed to allow for full integration with an ROV or deployed by divers.
    • The system is rated to 3000m with a track record of performing M16 welds in water depth of 1450m and welding studs in the field.

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