Nuclear and Power

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Fine Tubes has a pedigree of developing tubes for the nuclear industry dating back to the 1970s, when we started supplying nuclear fuel cans to the UK’s first generation of gas cooled reactors. As nuclear power has evolved, so has our expertise and we have manufactured products for AGR, pressurized water, light water, heavy water and fast breeder reactor technologies. Today you will find our tubes deployed in plants in the EU, the US, Canada, India and China.

Because nuclear power involves hazardous materials, strict compliance, integrity and precision are absolutely critical. We can control tube dimensions down to a tolerance of just ¼ the diameter of a human hair. Meanwhile, reactor fuel cans using our tubing operate at 650°C non-stop, for five years, without fail. Our 100% reliable components are also used in steam generators, heat exchangers, control and instrumentation units, and more.

Fine Tubes has reached this position in the market by working in partnership with our customers. Our experts will work side-by-side with engineers from design and engineering through testing and certification, and on to manufacture and delivery. Our product integrity is assured from melt to the finished tube.
We not only have the plant capacity to make quality assured tubing compliant with RCC-M, ASMEIII QSC for nuclear programs, but we also have a track record in helping the industry advance by developing new solutions.


  • Fuel cans
  • Tie bars
  • Guide tubes
  • Poison tubes
  • Gas detection
  • Flux thimble
  • Steam generators
  • In-core heat exchangers
  • Instrumentation and control tubing

Product information

Supply forms

Straight lengths: maximum 20m (65 feet)
Coils: maximum 80kgs (177lb)

Tube forms: straight, C- or U-bent

Surface finish: (as drawn) ID 0.4 micron Ra (157 micro inch Ra)
Surface finish: (electropolished) ID 0.1mm Ra (39 micro inch Ra)

Outside Diameter (OD)
mm inches
min max min max
0.8 38.1 0.031 1.5


Quality Assurance

Formal system approvals include:

  • ASME QSC NCA3800 (2011)
  • RCC-M
  • CSA N285.0 and 7 299 2 category 2 QA program
  • Nadcap (Heat Treatment) reaccredited at Merit Status by P.R.I.
  • Nadcap (NDT) reaccredited at Merit Status by P.R.I.
  • AD2000 Merkblatt W0/TRD100 – TüV 97/23/EC (PED)
  • ISO 9001 / AS EN 9100 by BSI.
  • ISO 14001 by BSI

Fine Tubes also has First Point Approval and can supply to NACE MR-0175 and P.E.D. Reference lists and individual client approvals are available on request.

TüV Nuclear product supply is based upon a system which meets the requirements of ASME Section III NCA 3800 for class 1 seamless instrumentation tube. This is independently audited as meeting the requirements of CSA N285.0 and Z299.2 Category 2 QA Program.

ASME Boiler & Pressure Vessel Code

Section I Rules for construction of Power Boilers
Section II Materials Part A Ferrous Material Specifications
Part B Non-Ferrous Material Specifications
Part C Specifications for welding rods,
electrodes and filler material
Section III Subsection NCA General Requirements for Divisions 1 and 2 NCA 3800 - Metallic Material
Organisations quality system program
Division 1 Metallic Vessels, heat exchangers,
piping systems etc
Subsequent NB - Class 1 Components
NB 2552 = Ultrasonic examination
Subsection NC Class 2 Components
Subsection NC Class 3 Components
Division 2 Code for concrete containments
Division 3 Containment system for storage and
transport of spent fuel & radioactive waste