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Butt-welding Pipe Fittings CuNi Elbow 90D LR ASTM B466 UNS C70600 ASME B16.9

Place of Origin Shanghai,China
Brand Name TOBO
Certification ISO/TUV/SGS
Model Number Butt Welding Fitting
Minimum Order Quantity 1PC
Price Negotiable
Packaging Details Standard Shipping Package
Delivery Time 15-30 Workdays
Payment Terms T/T,Western Union
Supply Ability 10Ton/Month
Product Details
Manufacturingprocess Forging And Welding Endconnection Butt Weld
Wallthickness Schedule 10 To Schedule XXS Technical Socket Weld
Warranty 3 Years Material Grrade ASTM AB564
Outer Diame 6-813mm Pressurerating Class 150 To Class 2500
Testing Radiographic Testing (RT), Ultrasonic Testing (UT), Hydrostatic Testing Type Elbows, Tees, Reducers, Caps, Stub Ends
Standard Oil Gas Water Industrial Technics Forged,Casting
Packing Customers' Requirement Customized Support OEM, ODM
Schedule SCH 5S - SCH XXS
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Product Description

Butt-welding Pipe Fittings CuNi Elbow 90D LR ASTM B466 UNS C70600 ASME B16.9

1. Product Description

This product is a 90-degree Long Radius (LR) butt-welding elbow manufactured from UNS C70600 (CuNi 90/10) in accordance with ASTM B466 and ASME B16.9 standards . The LR design features a radius of curvature equal to 1.5 times the pipe diameter (R = 1.5D), ensuring smooth fluid flow with minimal pressure loss . CuNi 90/10 is a solid-solution copper-nickel alloy with an alpha-phase structure, offering an excellent balance of corrosion resistance, strength, and cost-effectiveness .

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 / CuNi10Fe1.6Mn / 2.0872) 
Type 90° Long Radius Elbow (LR, R=1.5D) 
Nominal Size 1/2" – 24" (DN15 – DN600) 
Wall Thickness Sch5S, Sch10S, Sch40S, Sch80S, Sch160S, XS, XXS 
End Connection Butt-weld ends (beveled for welding)
Chemical Composition Cu: Bal. (min 88.6%), Ni: 9.0-11.0%, Fe: 1.0-1.8%, Mn: 1.0% max 
Tensile Strength 303–414 MPa 
Yield Strength (0.2%) ~110–135 MPa 
Elongation 30–42% 
Density ~8.94 g/cm³
Corrosion Rate ≤0.003 mm/a in seawater 

3. Application / Usage

This 90° LR elbow is ideal for demanding seawater and corrosive fluid systems :

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

  • Offshore Oil & Gas: Production platforms, subsea pipelines, FPSO units 

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

  • Power Generation: Condenser cooling systems, circulating water pipelines 

  • Chemical Processing: Corrosive fluid handling systems 

4. Advantages

  • Superior Corrosion Resistance: Exceptional resistance to seawater, pitting, crevice corrosion, and stress corrosion cracking; forms a protective oxide film that improves with service time 

  • Biofouling Resistance: Naturally resists marine biological growth; cuprous ion release retards organism settlement 

  • Cost-Effective: Lower nickel content provides significant material cost savings compared to C71500 

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

  • Long Radius Design: R=1.5D ensures smooth flow and reduced turbulence 

5. Functions

The 90° LR elbow changes the direction of fluid flow within a piping system by 90 degrees with minimal pressure drop, thanks to the long radius design that reduces flow resistance and turbulence .

6. Installation Instructions

  1. Preparation: Degrease and clean pipe ends and elbow weld areas thoroughly with approved solvent to remove oil, grease, and oxidation .

  2. Edge Preparation: For wall thickness ≥3mm, prepare a V-groove with 60-75° included angle .

  3. Alignment: Accurately align the elbow with connecting pipes; tack welds should be kept minimum and cleaned thoroughly .

  4. Welding: Use TIG (GTAW) process with ERCuNi filler wire (AWS A5.7). Shielding: 100% pure argon; back-purging required for root pass to prevent oxidation. Maintain short arc length and use stringer bead technique .

  5. Post-Weld: Allow gas flow over weld after completion; no post-weld heat treatment required .

7. Precautions

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

  • Temperature Control: Interpass temperature must not exceed 120°C; pre-heat to ~25°C in cold/humid conditions 

  • Crater Sensitivity: Use downslope device to prevent crater cracks; taper current off at stops 

  • No Nitrogen: Must not be used as back-purge gas 

8. Shipping & Delivery

  • Standard delivery time: 10–100 days depending on order quantity and specifications .

9. Payment Terms

  • Common international 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 to ensure safe transportation .

11. After-Sales / Return & Warranty Policy

  • All products undergo 100% strict quality inspection before shipment.

  • 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.

Butt-welding Pipe Fittings CuNi Elbow 90D LR ASTM B466 UNS C70600 ASME B16.9Butt-welding Pipe Fittings CuNi Elbow 90D LR ASTM B466 UNS C70600 ASME B16.9

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.