Factory Direct CuNi 70/30 Equal Tee Butt Weld Fitting NACE MR0175 Desalination

1. Product Description

The Copper Nickel Equal Tee is a fitting with three fully equal bore paths, used to create perpendicular branches from main pipelines. Manufactured from high-quality copper-nickel alloy (Cu-Ni 90/10 or 70/30) by hot forging or cold extrusion, it offers high dimensional accuracy and uniform wall thickness. Production and inspection follow ASTM B466, ASME B16.9, and EN 10253-2, providing excellent resistance to seawater corrosion and biofouling – a reliable choice for severe service piping.

2. Product Applications

• Merchant & naval vessels:Seawater cooling system branches, fire monitor water supply, ballast tank fill/drain lines, seachest outlet piping

• Deep-sea oil production:Subsea production control system hydraulic lines, umbilical termination branches, subsea manifold connections

• Coastal power stations:Essential service water systems in nuclear plants, condenser cooling water in/out lines in thermal plants, circulating pump outlet distribution headers

• Desalination plants:Brine heater circulation lines in MSF units, reverse osmosis unit feed header branches

• Chemical plants:Cooled brine lines in chlor-alkali plants, bromine-containing wastewater pipes in pesticide plants, water injection lines on oil platforms

• Marine aquaculture:Hatchery water supply ring mains, inlet/outlet lines for aquaculture ponds

3.Installation & Precautions

• Receiving inspection:Verify size, quantity, and material marking. Spot-check surface for micro-cracks using MT or PT.

• Pre-weld preparation:Grind bevel and surrounding 25mm area to bright metal using stainless steel brush or grinding wheel; do not use chlorine-containing cleaners.

• Welding procedure:GTAW root pass, SMAW fill and cap. Use ECuNi electrodes and ERCuNi filler wire. Heat input 10-20 kJ/cm; interpass temperature ≤150℃.

• Dissimilar metal connections:When connecting to carbon steel or austenitic stainless steel, use bimetallic transition joints or insulating flanges to prevent galvanic corrosion.

• Pipe supports:Place rubber or plastic pads between supports and fittings to avoid local wear from direct metal contact.

• Long-term shutdown:If system out of service for more than one month, drain and flush with fresh water, dry, then seal.

• Special warnings:Evaluate suitability if H₂S content in medium is high; do not use for molten metals or dry chlorine gas.

​

4. Key Technical Parameters

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.