Butt-welding Pipe Fittings CuNi Cross ASTM B466 UNS C70600 ASME B16.9

Butt-welding Pipe Fittings CuNi Cross ASTM B466 UNS C70600 ASME B16.9

1. Product Description

This product is a butt-welding cross fitting manufactured from UNS C70600 (90/10 Copper-Nickel alloy) in accordance with ASTM B466 and ASME B16.9 standards. Also known as CuNi 90/10 or Werkstoff Nr. 2.0872, this alloy is composed of approximately 90% copper and 10% nickel with small additions of iron and manganese for enhanced properties. The cross features four ports arranged at 90-degree angles, designed for permanent butt-weld connection in demanding piping systems.

2. Key Product Parameters

3. Application / Usage

This cross is ideal for seawater and corrosive fluid systems requiring multi-directional flow distribution:

• Marine & Shipbuilding: Seawater cooling systems, firewater lines, ballast systems

• Offshore Oil & Gas: Seawater injection systems, heat exchangers

• Desalination Plants: High-pressure RO feed piping, brine discharge

• Power Generation: Condenser cooling water systems, nuclear plant seawater circulation

• Chemical Processing: Corrosive fluid handling systems

4. Advantages

• Superior Corrosion Resistance: Exceptional resistance to seawater, pitting, crevice corrosion, and stress corrosion cracking

• Biofouling Resistance: Forms a protective oxide layer that resists marine biological growth

• Excellent Weldability: No phase transformation during welding; maintains corrosion resistance

• Cost-Effective: Offers a favorable balance of performance and cost compared to higher nickel alloys

• Multiple Flow Paths: Four-port design enables fluid distribution or combination in complex piping networks

5. Functions

The cross connects four pipe sections in a cruciform configuration, enabling fluid to be divided from a single inlet into three branch outlets, or combined from multiple inlets into one outlet. It provides a permanent, leak-proof junction point with all four ports of equal diameter, facilitating multi-directional flow distribution in piping systems.

6. Installation Instructions

1. Preparation: Degrease and clean pipe ends, cross weld areas, and filler metal of oil, grease, and oxidation

2. Alignment: Accurately align the cross with four connecting pipes ensuring proper fit-up

3. Welding: Use TIG (GTAW) or appropriate welding process with matching filler metal. Shielding gas required to prevent oxidation

4. Post-Weld Cleaning: Clean with stainless steel brush to leave a bright finish; no post-weld heat treatment is required

7. Precautions

• Cleanliness: Requires a higher degree of cleanliness than for steel fabrication

• Temperature Limit: For aqueous corrosion service, limit to approximately 470°C; verify system conditions

• Welding Procedure: Use proper procedures with inert gas shielding to prevent contamination

• Thread Type: If applicable, verify thread compatibility per system specification

8. Shipping & Delivery

• Standard delivery time is typically 15–30 days, subject to order quantity, size, and specification availability

9. Payment Terms

• Common international payment methods include T/T (Telegraphic Transfer) and L/C at sight (Letter of Credit)

10. Packaging

• Products are securely packed in plywood cases or wooden crates with bubble wrap and internal cushioning to ensure safe transportation

11. After-Sales / Return & Warranty Policy

• All products undergo strict quality inspection before shipment, with Mill Test Certificates (EN 10204 3.1/3.2) available

• In case of quality issues, retain original packaging and provide relevant photos or third-party inspection reports

• Specific return, exchange, and warranty terms are subject to the final sales contract agreement.

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.