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
| Parameter | Details / Range |
|---|---|
| Dimensional Standard | ASME B16.9, ASME B16.28, MSS-SP-43 |
| Material Standard | ASTM B466 / ASME SB466 |
| Material Grade | UNS C70600 (CuNi 90/10 / 2.0872) |
| Type | Equal Cross (four equal ports) |
| Size Range | Seamless: 1/2" – 10"; Welded: 1/2" – 48" |
| Wall Thickness | SCH10, SCH40, SCH80, SCH160, etc. |
| End Connection | Butt-weld ends (beveled for welding) |
| Chemical Comp. (Cu/Ni/Fe/Mn) | 88.6% min / 9.0-11.0% / 1.0-1.8% / 1.0% max |
| Tensile Strength | ~345 MPa (50,000 psi) |
| Yield Strength (0.2%) | ~105–125 MPa (15,000–20,000 psi) |
| Elongation | 30% min |
| Density | ~8.94 g/cm³ |
3. Application / Usage
This cross is ideal for seawater and corrosive fluid systems requiring multi-directional flow distribution:
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Marine & Shipbuilding: Seawater cooling systems, firewater lines, ballast systems
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Offshore Oil & Gas: Seawater injection systems, heat exchangers
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Desalination Plants: High-pressure RO feed piping, brine discharge
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Power Generation: Condenser cooling water systems, nuclear plant seawater circulation
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Chemical Processing: Corrosive fluid handling systems
4. Advantages
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Superior Corrosion Resistance: Exceptional resistance to seawater, pitting, crevice corrosion, and stress corrosion cracking
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Biofouling Resistance: Forms a protective oxide layer that resists marine biological growth
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Excellent Weldability: No phase transformation during welding; maintains corrosion resistance
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Cost-Effective: Offers a favorable balance of performance and cost compared to higher nickel alloys
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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
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Preparation: Degrease and clean pipe ends, cross weld areas, and filler metal of oil, grease, and oxidation
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Alignment: Accurately align the cross with four connecting pipes ensuring proper fit-up
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Welding: Use TIG (GTAW) or appropriate welding process with matching filler metal. Shielding gas required to prevent oxidation
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Post-Weld Cleaning: Clean with stainless steel brush to leave a bright finish; no post-weld heat treatment is required
7. Precautions
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Cleanliness: Requires a higher degree of cleanliness than for steel fabrication
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Temperature Limit: For aqueous corrosion service, limit to approximately 470°C; verify system conditions
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Welding Procedure: Use proper procedures with inert gas shielding to prevent contamination
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Thread Type: If applicable, verify thread compatibility per system specification
8. Shipping & Delivery
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Standard delivery time is typically 15–30 days, subject to order quantity, size, and specification availability
9. Payment Terms
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Common international payment methods include T/T (Telegraphic Transfer) and L/C at sight (Letter of Credit)
10. Packaging
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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
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All products undergo strict quality inspection before shipment, with Mill Test Certificates (EN 10204 3.1/3.2) available
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In case of quality issues, retain original packaging and provide relevant photos or third-party inspection reports
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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.
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