ISO 9001:2015 Certified Manufacturer

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Copper-Nickel Pipe Solutions

Precision-manufactured CuNi 90/10 and CuNi 70/30 seamless pipes for marine, offshore, oil & gas, and industrial applications — engineered for exceptional corrosion resistance and long service life.

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CuNi Grades

ISO

9001:2015 Certified

Global

Export Capability

CuNi Copper Nickel Pipes by Sunflex Metalloy

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Recommended: 1080 × 880 px

CuNi

90/10 & 70/30

Certified

ISO 9001

:2015

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CuNi

Pipe Specialists

Why Sunflex Metalloy

Engineered for Demanding Environments

We manufacture exclusively in Copper-Nickel alloys — combining metallurgical expertise with strict process controls to deliver pipes that meet international standards and exceed expectations.

ISO 9001:2015 Certified Quality

Every batch undergoes chemical, dimensional, and mechanical testing. Full material test reports (MTR) provided with each shipment.

International Standard Compliance

Manufactured to ASTM B466, ASTM B111, DIN 86019, BS EN 12449 — accepted by global inspection agencies and classification societies.

Superior Corrosion Resistance

CuNi alloys deliver outstanding resistance to seawater corrosion, biofouling, and erosion — ideal for continuous marine and offshore service.

Custom Dimensions & Fast Delivery

Flexible production for bespoke wall thicknesses, ODs, and lengths. Responsive to urgent project timelines with minimal lead times.

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Recommended: 900 × 840 px

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360 × 280 px

About Sunflex Metalloy

Dedicated Copper-Nickel Pipe Manufacturer

Sunflex Metalloy is a specialized manufacturer of Copper-Nickel (Cupro-Nickel) seamless pipes, established with a singular focus on serving industries where reliability, corrosion resistance, and material integrity are non-negotiable. We supply CuNi 90/10 and CuNi 70/30 alloy pipes to marine shipbuilders, offshore platform contractors, and industrial process engineers across the globe.

From small-bore instrumentation lines to large-diameter seawater cooling systems, every pipe we manufacture is produced to strict international standards, backed by our ISO 9001:2015 quality management system and complete material traceability.

ISO 9001:2015 Certified

Full Material Traceability

ASTM / DIN Compliant

MTR with Every Shipment

Third-Party Inspection

Global Export Network

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Our Products

CuNi Seamless Pipes

Two proven Copper-Nickel alloy grades — engineered for the most demanding corrosive and high-pressure service conditions in marine, offshore, and industrial environments.

CuNi 90/10 Seamless Pipe by Sunflex Metalloy

CuNi 90/10 Product Photo

Recommended: 800 × 580 px

C70600

CuNi 90/10 Seamless Pipes

Alloy: 90% Copper · 10% Nickel

The workhorse of marine and seawater piping systems. CuNi 90/10 offers excellent resistance to seawater corrosion, high-velocity erosion, and biofouling while maintaining good mechanical strength and weldability. Widely specified in shipbuilding, desalination, and offshore platforms.

Outer Diameter

6 mm – 219 mm

Wall Thickness

0.5 mm – 20 mm

Standards

ASTM B466 / DIN 86019

Temper

Annealed / Hard

Key Applications

Shipbuilding Seawater Cooling Desalination Firefighting Lines Heat Exchangers

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CuNi 70/30 Seamless Pipe by Sunflex Metalloy

CuNi 70/30 Product Photo

Recommended: 800 × 580 px

C71500

CuNi 70/30 Seamless Pipes

Alloy: 70% Copper · 30% Nickel

The high-performance grade for extreme environments. CuNi 70/30 delivers superior strength, higher resistance to erosion-corrosion at elevated flow velocities, and better performance in polluted seawater and aggressive chemical media — the preferred choice for critical offshore and naval applications.

Outer Diameter

6 mm – 168 mm

Wall Thickness

0.5 mm – 16 mm

Standards

ASTM B466 / ASTM B111

Temper

Annealed / Hard

Key Applications

Offshore Platforms Naval Vessels Condenser Tubes Oil & Gas Refineries Power Generation

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Compliance & Testing Standards

ASTM B466

Seamless Copper-Nickel Pipe & Tube

ASTM B111

CuNi Condenser & Heat Exchanger Tubes

DIN 86019

CuNi 90/10 Seamless Pipes — Marine Grade

BS EN 12449

Copper & Copper Alloy Seamless Round Tubes

Industries We Serve

Trusted Across Critical Industries

Our CuNi pipes are deployed in the world's most demanding service environments — wherever corrosion resistance, reliability, and long service life are paramount.

Marine & Shipbuilding

Seawater pipelines, fire-main systems, ballast lines, hull cooling, and deck piping for naval and commercial vessels.

Offshore & Oil Platforms

Subsea cooling, process piping, instrumentation, and firewater systems on FPSOs and fixed offshore structures.

Oil & Gas Refineries

Process fluid handling, cooling water circuits, heat exchanger tubes, and high-pressure utility lines in refineries.

Desalination Plants

MSF and RO plant piping — where resistance to hot, concentrated brine and seawater is critical for long service life.

Power Generation

Condenser tubes, steam surface condensers, and cooling water systems in coastal and offshore power plants.

Defence & Naval

Torpedo tubes, submarine piping, aircraft carrier seawater systems — applications demanding the highest material integrity.

Certifications

Quality You Can Trust

Our manufacturing processes and quality systems are validated by internationally recognized certification bodies — giving you full confidence in every pipe we deliver.

ISO 9001:2015

Quality Management System — Manufacturing of Copper-Nickel Seamless Pipes

ISO 9001: 2015 Certified

Material Test Certificate — Sunflex Metalloy

ISO 45001: 2018

Quality Management System — Manufacturing of Copper-Nickel Pipes

ISO 45001: 2018 Certified

Industry Compliance Certificate — Sunflex Metalloy

MSME Certificate

Regulatory and industry-specific compliance certification for global export and supply

MSME CERTIFIED

Get In Touch

Request a Quote or Enquiry

Our team responds within 24 hours. Send us your requirements and we'll provide a competitive quote with full technical details.

Phone / WhatsApp

+91 99306 14545

sales@cunipipes.com

Address

Survey No.2160, Plot No.17, Parshva Industrial Park Rd, behind New GIDC Road, Devdham, Dehri, Umargam, Gujarat 396171

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