Copper Nickel Butt Welding Concentric Reducer 2"x1" ASTM B466 C70600 Pipe Fitting

Copper Nickel Butt Welding Concentric Reducer 2"x1" ASTM B466 C70600  Pipe Fitting

1. Product Description

This product is a butt-welding concentric reducer manufactured from UNS C70600 (90/10 Copper-Nickel alloy / CuNi 90/10) in accordance with ASTM B466 and ASME B16.9 standards. Also known as CuNi10Fe1.6Mn or Werkstoff Nr. 2.0872, this alloy consists of approximately 90% copper and 10% nickel, with small additions of iron (1.0-1.8%) and manganese to enhance strength and corrosion resistance. The 90/10 CuNi alloy has a single-phase alpha structure, providing excellent fabricability and weldability. This 2" x 1" fitting is designed for permanent butt-weld connection, enabling a smooth, concentric reduction from a larger bore to a smaller bore while maintaining a common centerline.

2. Key Product Parameters

3. Application / Usage

This concentric reducer is ideal for seawater and corrosive fluid systems requiring pipe diameter transitions:

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

• Offshore Oil & Gas: Seawater lift pipes, platform cooling water ring mains, seawater injection

• Desalination Plants: Seawater intake, reverse osmosis feed distribution, brine recirculation lines

• Power Generation: Condenser cooling water systems, heat exchangers

• Chemical Processing: Corrosive fluid handling, hydraulic lines

4. Advantages

• Superior Seawater Corrosion Resistance: Exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking in marine environments; forms a protective oxide layer that improves with service

• Biofouling Resistance: Naturally resists marine biological growth due to copper ion release

• Excellent Weldability: Single-phase alpha structure enables outstanding fabrication properties without complex preheating or post-weld heat treatment

• Cost-Effective: Widely used as an inexpensive alternative to 70/30 CuNi, titanium, or super duplex grades while delivering excellent performance

• Smooth Flow Transition: Concentric design with common centerline ensures uniform diameter reduction with minimal turbulence and pressure drop

5. Functions

The concentric reducer connects two pipes of different diameters in a straight line while maintaining a common centerline. It reduces the pipe diameter uniformly from 2" to 1", ensuring smooth, efficient fluid flow with minimal turbulence and pressure drop. The butt-weld connection provides a permanent, leak-proof joint with high structural integrity.

6. Installation Instructions

1. Unpacking Inspection: Check for transit damage; verify markings are clear and complete

2. Surface Preparation: Clean weld bevel and adjacent area within 10mm using a stainless steel wire brush; remove all oil, grease, and oxidation

3. Alignment: Accurately align the reducer with connecting pipes ensuring concentricity. Square butt weld preparations are possible up to 3mm wall thickness

4. Tacking: Apply minimum tack welds to hold assembly in position; clean thoroughly before final welding

5. Welding: Use GTAW (TIG) process with ERCuNi filler wire (AWS A5.7). Shielding: 100% argon or Ar-He mix. Preheat recommended at 200-300°F (93-150°C). Use DCEN (Direct Current Electrode Negative). Keep tack welds to a minimum

6. Post-Weld: No post-weld heat treatment required; clean with stainless steel brush to leave a bright finish

7. Precautions

• Cleanliness: Requires a higher degree of cleanliness than carbon steel fabrication; use dedicated stainless steel tools

• Temperature Limit: For aqueous corrosion service, verify system conditions for temperatures above 300°C

• Welding Heat Input: CuNi puddle is sluggish with an oxide film; requires appropriate amperage control

• Medium Compatibility: Not recommended for use with strong oxidizing acids (e.g., nitric acid) or ammonia systems

• Pressure Rating: Verify that the fitting's pressure class matches the system design requirements

8. Shipping & Delivery

• Standard delivery time is typically 7–30 days, subject to order quantity 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, wooden crates, or pallets with internal cushioning to ensure safe transportation and prevent damage during transit

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

• Optional third-party inspection by ABS, DNV, CCS, LR, BV, RINA, or KR is 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.