Top Cupronickel Pipes and Fittings Manufacturer & Exporter
Menu
Top Cupronickel Pipes and Fittings Manufacturer & Exporter
Our CuNi 70/30 and CuNi 10/90 products have excellent behavior when exposed to all forms of marine corrosion.
This property is mainly due to the fact that the alloy prevents dissolution by forming a very strong protective surface film.
| Corrosive environment | Probable corrosion | Behavior in service |
|---|---|---|
| Clean sea water circulation at a velocity of up to 1 m/s |
Uniform or general | 0,0025 - 0,025 mm/an |
| Clean sea water circulation at a velocity of up to 3,5 m/s* : and 4,5 m/s* : |
Impact corrosion | Satisfactory |
| Polluted sea water and accelerated pitting corrosion |
General corrosion | Less resistance |
| Deposits accumulated at the surface | Local attack | Generally good |
| Corrosion + stress | Stress corrosion | Very resistant |
* the local speeds resulting from obstructions can be higher.
| Type of corrosion | Behaviour |
|---|---|
| General corrosion | Slightly sensitive to this type of corrosion Corrosion rate is less than 25 μ/year |
| Pitting corrosion | Insensitive to this type of attack Penetration rate less than 25/130 μ/year |
| Selective corrosion | Insensitive Do not lose the alloying component like brasses and aluminium bronzes |
| Stress corrosion | Never affected by this type of corrosion |
| Fouling corrosion | Insensitive Even at a low circulation speed, and although not affected by general corrosion, perfectly resist to the build-up of marine organisms |
| Corrosion-Erosion (impingement attack) |
Very slightly sensitive The addition of an optimum quantity of iron improves the nature of the protective film and makes the alloy very resistant to this type of agression |
| Galvanic corrosion | Insensitive in the presence of other copper based metals. With a dissolution potential of 200 mv/ECS in sea water, is compatible with all other copper based metals. |
Tests of resistance to fire have been made in simulating the service conditions of a pipeline during an offshore fire : piping empty – during 5 minutes – at 700°C, partly in the flame, then 15 minutes on water (with the start of the sprinklers).
They have shown the total reliability of : no rupture of the weld or of the brazing, no leakage, no permanent deformation. After the end of the fire, the piping in has needed no replacement.
We are one of the prominent manufacturer and supplier of cupronickel products in India. We have achieved this by consistently upholding our highest ethical standards, integrity, and values in the market from last two decades.