CuNi 70/30 Seamless Copper Nickel Pipe ASME SB466 For Marine & Industrial Use

Product Specification

CuNi 70/30 Seamless Copper Nickel Pipe ASME SB466 For Marine & Industrial Use

1.Product Description 

Copper nickel pipe is an alloy tubing manufactured from Cu‑Ni systems, primarily grades 90/10 (C70600) and 70/30 (C71500), with controlled additions of iron and manganese. It is available in seamless and welded forms, produced to ASTM B466, ASTM B111, ASME SB111, EN 12451, and JIS H3300. The material is widely recognised for its dependable performance in marine and industrial fluid systems, combining moderate strength with exceptional resistance to seawater corrosion and biofouling.

2.Primary applications:

• Shipbuilding & marine – Seawater cooling, fire‑fighting mains, ballast, bilge, and sanitary systems; hydraulic and pneumatic control lines.

• Offshore oil & gas – Platform piping, FPSO topside modules, subsea umbilicals, and riser cladding.

• Desalination plants – Evaporator tubes, brine heaters, and interconnecting piping in MSF and MED processes.

• Power generation – Condenser tubes, cooling water circuits, and auxiliary heat exchangers in thermal and nuclear power stations.

• Industrial heat exchangers – Shell‑and‑tube and plate‑type heat exchangers for chemical, petrochemical, and food processing.

• Renewable marine energy – Cooling systems for wave/tidal generators and floating wind turbines.

• Aquaculture – Seawater supply lines, fish cage framework, and pumping systems.

• Automotive & aerospace – Brake lines, power steering tubes (automotive); aircraft ducting and thrust‑reverser systems (aerospace).

3.Product Advantages 

• Outstanding seawater corrosion resistance – General corrosion rate in clean seawater is only 0.025–0.0025 mm/year, far better than carbon steel and many stainless steels.

• Natural anti‑biofouling – Copper ions released from the surface inhibit attachment of barnacles, mussels, and algae, reducing maintenance and cleaning costs.

• High resistance to erosion‑corrosion – Performs well under high‑velocity flow and turbulent conditions, especially the 70/30 grade.

• Excellent fabricability – Can be easily welded (TIG, MIG), brazed, bent, and flared without special heat treatment.

• Long service life – Proven field performance of over 50 years in marine systems with minimal maintenance.

• Lightweight compared to steel – Allows thinner wall schedules for equivalent pressure ratings, reducing overall system weight.

• Immune to stress‑corrosion cracking – Unlike austenitic stainless steels, no SCC risk in chloride environments.

• Cost‑effective – Lower material cost than titanium or nickel‑base alloys, while offering sufficient performance for most seawater duties.

4.Key Product Parameters

FAQ

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