CuNi 70/30 Forged SW Flange ASME B16.5 CL150 Seawater Corrosion Resistant

1. Product Description

CuNi 70/30 Forged Socket Weld Flange is manufactured from high-quality copper-nickel alloy (UNS C71500) through hot forging process. Designed with socket weld connection and Raised Face sealing surface, this flange is produced in accordance with ASME B16.5 standard, Class 150 pressure rating. The socket weld design provides easy pipe insertion and fillet welding, ensuring smooth flow and secure connection. With excellent seawater corrosion resistance, this flange is a reliable choice for marine piping, cooling water systems, and various industrial applications in corrosive environments.

2. Key Product Parameters

3. Product Applications

• Seawater cooling systems for vessels and industrial facilities

• Cooling water circuits for power plants and processing equipment

• Water treatment and desalination plant piping

• Heat exchanger and condenser water box connections

• Offshore platform water service systems

• Marine fire water and deck wash piping

• Chemical process lines handling brine and corrosive fluids

• Water circulation and transfer systems

• Bilge and ballast water piping

4. Product Advantages

1. Excellent Seawater Corrosion Resistance: CuNi 70/30 alloy forms a natural protective layer in seawater, providing long-term service with minimal corrosion rates, making it a dependable material for marine environments.

2. Hot Forged Quality: Manufactured through hot forging process, the flange has dense and uniform grain structure with good mechanical strength, offering reliable performance compared to cast alternatives.

3. Natural Anti-Fouling Property: The copper content in the alloy helps reduce marine organism attachment on internal surfaces, keeping pipes cleaner and reducing maintenance needs.

4. Easy and Quick Installation: Socket weld design allows the pipe to be simply inserted into the socket and fillet welded, eliminating complex alignment work and saving installation time.

5. Reliable Sealing Performance: Raised Face design provides an effective sealing surface when used with suitable gaskets, ensuring leak-free connections under rated pressure.

6. Good Weldability: Compatible with CuNi 70/30 pipes using standard TIG welding process with matching filler wire, producing strong and durable weld joints.

7. ASME Standard Compliance: Manufactured to strict ASME B16.5 dimensional tolerances, ensuring proper fit with standard pipes, fittings, gaskets and fasteners.

8. Low Maintenance Cost: The self-forming protective film on the material surface eliminates the need for additional coatings or protective treatments, reducing long-term maintenance expenses.

5. Product Functions

• Provide a reliable socket weld connection point for pipes in seawater and industrial piping systems

• Ensure leak-proof sealing with Raised Face design and compatible gaskets

• Withstand Class 150 working pressure for safe continuous operation

• Allow convenient disassembly for system inspection, maintenance and modification

• Support modular piping system design with easy sectional installation

• Accommodate pipe thermal expansion within system design limits

6. User Instructions

Pre-Installation Preparation:

1. Inspect each flange upon receipt for any signs of transport damage or surface defects.

2. Verify flange size, pressure class and material grade against project specifications.

3. Clean the socket bore and raised face sealing surface thoroughly using suitable solvent.

4. Check that pipe end outside diameter matches socket bore dimensions.

5. Use dedicated tools for copper-nickel material preparation to avoid cross contamination.

Installation Steps:

1. Insert the pipe fully into the flange socket until the pipe end reaches the socket bottom.

2. Withdraw the pipe approximately 1.6mm to create proper expansion gap.

3. Ensure the pipe is square to the flange face and properly centered.

4. Tack weld at minimum 4 equally spaced positions around the hub circumference.

5. Complete the fillet weld using TIG welding process with ERCuNi filler wire.

6. Use argon shielding gas during welding for proper protection.

7. Keep interpass temperature moderate, avoid overheating the material.

8. Clean weld area thoroughly after completing each pass.

Gasket and Bolt Installation:

1. Select gasket material suitable for the service medium and operating conditions.

2. Center the gasket on the raised face sealing surface.

3. Insert bolts and hand-tighten all nuts.

4. Tighten bolts evenly in a diagonal crossing pattern.

5. Apply torque in minimum 3 passes to achieve uniform gasket compression.

Post-Installation Inspection:

1. Perform visual inspection of all socket welds for surface defects.

2. Conduct pressure test as per project specifications.

3. Check all flange joints for any signs of leakage.

7. Product Precautions

1. Storage: Store flanges in a clean, dry and ventilated indoor area. Keep away from moisture, dust and direct outdoor exposure.

2. Material Separation: During storage and transport, keep CuNi flanges separated from carbon steel and other dissimilar metals to prevent contact corrosion.

3. Handle with Care: CuNi material is softer than steel. Avoid dropping, dragging or impacting during handling to prevent surface damage.

4. No Ammonia Service: CuNi 70/30 should not be used in environments containing ammonia or amine compounds, as this may cause material degradation.

5. Welding Protection: Always use argon shielding gas when welding CuNi material. Inadequate shielding will result in poor weld quality.

6. Dedicated Tools: Use separate tools, brushes and grinding wheels reserved for copper-nickel work to prevent iron contamination.

7. Flow Velocity: For seawater service, it is advisable to keep continuous flow velocity within reasonable limits to maximize service life.

8. System Compatibility: In piping systems, maintain material consistency where possible. If connecting to dissimilar metals, take appropriate isolation measures.

8. Shipping Information

9. Payment Information

10. Packaging Information

11. Purchase, Return & After-Sales Service

How to Purchase:

1. Send inquiry with required size, quantity and specifications.

2. Receive quotation with price, delivery time and terms.

3. Confirm order and sign sales contract.

4. Arrange advance payment to start production.

5. Production completed with quality inspection.

6. Arrange balance payment before shipment.

7. Goods shipped with all necessary documents.

Return & Exchange Policy:

• Quality Issues: If any manufacturing defect or material non-conformance is found, please notify us within 30 days of receipt. We will provide replacement or refund after verification.

• Non-Quality Returns: For returns due to ordering errors, please contact us within 15 days. Products must be unused and in original packaging. Return shipping costs are borne by the customer.

• Non-Returnable: Products that have been welded, installed, modified, or damaged due to improper handling.

After-Sales Service:

• Warranty: 12 months from date of shipment against manufacturing defects.

• Technical Support: Available for product questions, installation guidance and application advice.

• Quick Response: We reply to inquiries within 24 hours on working days.

• Spare Parts: We support repeat orders and can maintain stock for regular customers.

• 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.