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

Product Specification

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.