ASTM B466 CuNi 70/30 Seamless Pipe, Large Diameter for Petrochemical

Product Specification

ASTM B466 CuNi 70/30 Seamless Pipe, Large Diameter for Petrochemical

1.Product Introduction 

Copper‑nickel piping systems represent a mature, well‑documented technological solution for demanding aqueous transport and heat‑transfer duties. The two principal alloy grades – C70600 (90‑10) and C71500 (70‑30) – are essentially solid‑solution strengthened materials that derive their resilience from a stable, protective oxide film which forms spontaneously upon exposure to clean seawater. Manufactured as either seamless or welded tube, these products comply with a comprehensive suite of international standards (ASTM, ASME, EN, JIS) and are universally recognised by classification societies and engineering consultancies as the reference material for critical marine infrastructure.

2.Product Advantages

• Slash maintenance intervals – The self‑repairing oxide film means fewer shutdowns for cleaning and inspection. Operators report up to 70% reduction in tube‑related outages compared to carbon steel or admiralty brass systems.

• Eliminate chemical dosing in many cases – The intrinsic bioresistance often removes the need for continuous chlorination or biocides in seawater intakes, lowering both chemical expenses and environmental compliance burdens.

• Maximise asset longevity – With documented service records exceeding 50 years in naval and merchant fleets, CuNi pipe delivers predictable, long‑term depreciation schedules for capital accounting.

• Reduce pump energy consumption – Superior internal surface finish and lower friction factors over time (minimal roughening due to corrosion) maintain hydraulic efficiency, trimming pumping OPEX over decades.

• Simplify inventory management – Two alloy grades cover over 90% of seawater piping needs, allowing standardised procurement and reduced spare‑parts complexity.

• Enable thinner, lighter designs – Design codes permit higher allowable stresses at moderate temperatures, translating to reduced structural supports and simpler installation logistics.

• Eliminate worry about SCC – Unlike 300‑series stainless steels, these alloys show zero susceptibility to chloride stress‑corrosion cracking, a hidden failure risk that carries catastrophic safety implications.

3.Product Applications

• Maritime propulsion and auxiliary systems – Central cooling water loops, main engine jacket water cooling, fuel oil transfer and purification lines, and steam condensate recovery aboard all vessel types.

• Floating production and subsea infrastructure – Topside piping on FPSOs and semi‑submersibles, subsea chemical injection lines, and protective cladding for steel risers in splash zones.

• Water‑energy nexus (desalination) – Tube bundles for multi‑effect distillation (MED) and multi‑stage flash (MSF) evaporators, as well as brine recirculation and product water take‑off lines.

• Thermal power and nuclear generation – Main surface condensers, auxiliary cooling water systems for turbine auxiliaries, and spent fuel pool cooling circuits (where seawater is the ultimate heat sink).

• General industrial heat exchange – Process reboilers, overhead condensers, and lean/rich amine exchangers in gas‑treatment plants; also used in closed‑loop cooling for compressor stations.

• Aquaculture and coastal infrastructure – Large‑diameter seawater feed mains for land‑based fish farms, hatchery recirculation systems, and seawater intake screens.

• Specialised mobility – Hydraulic servo lines on large off‑highway vehicles and marine cranes; air‑conditioning chiller water circuits for high‑end ships.

4.Key Product Parameters

FAQ

1. Are you trading company or manufacturer ? We are manufacturer ,You can see the certification.

2. How long is your delivery time? Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity. 3. Do you provide samples ? is it free or extra ? Yes, we could offer the sample for free charge but need pay the cost of freight.

4. What is your terms of payment ? Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.