C70600 CuNi 90/10 Equal Tee ASME B16.9 Butt Weld SCH10 for Heat Exchanger
C70600 CuNi 90/10 Equal Tee ASME B16.9 Butt Weld SCH10 for Heat Exchanger
1. Product Description
The Copper Nickel Equal Tee is a three-way fitting with equal bores, designed specifically for perpendicular equal-diameter branch connections in piping systems. Manufactured from copper-nickel alloy (Cu-Ni 90/10 or 70/30) by seamless cold drawing or hot extrusion. Compliant with ASTM B466, ASME B16.9, and BS 2871, it offers excellent resistance to seawater corrosion, erosion, and biofouling, making it a key component in shipbuilding, offshore, and chemical piping systems.
2. Product Applications
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Ship systems:Main engine cooling water, ballast water fill/discharge, fire hydrant supply, deck washing lines
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Offshore platforms:Seawater lift pipes, platform cooling water ring mains, emergency firewater systems
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Desalination:Flash chamber brine circulation, RO feed distribution, concentrate outfall
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Chemical plants:Electroplating wastewater transmission, saline organic waste liquid lines, cooling tower makeup water
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Nuclear power plants:Component cooling water (essential service water) inlet/outlet branches
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Others:Coastal scenic area water supply, marine ranch water exchange lines, ship shore power cooling systems
3.Installation & Precautions
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Unpacking inspection:Check for transit damage; verify markings are clear and complete.
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Surface preparation:Clean bevel and 30mm of inner/outer wall area with stainless steel wire brush before welding; remove all oil and paint.
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Butt welding:Maximum permissible misalignment during fit-up is 10% of wall thickness, not exceeding 1.5mm. Use low current and fast welding to avoid overheating.
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Socket weld:Insert pipe fully to socket bottom then pull back approx. 2mm to avoid stress concentration at root.
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Threaded connection:Wrap PTFE tape 2-3 turns; hand-tighten then wrench-tighten no more than 1.5 turns.
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Pressure test requirement:Hydrotest pressure = 1.5× design pressure; ambient temperature should not be <5℃ during test.
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Prohibitions:
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Do not contact with low-melting-point metals such as zinc, cadmium, or lead.
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Not for strong oxidizing acids (e.g., fuming nitric acid).
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Do not force alignment during installation to avoid additional stress.
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4. Key Technical Parameters
| Parameter | Value |
| Material Grade | Cu-Ni 90/10 (C70600), Cu-Ni 70/30 (C71500) |
| Nominal Size | 1/2″ – 42″ (DN15 – DN1050) |
| Schedule | Sch5, Sch10, Sch20, Sch30, Sch40, Sch60, Sch80, Sch100, Sch120, Sch140, Sch160 |
| Applicable Standards | ASTM B122/B466/B467; ASME B16.9; BS 2871 Part 3; JIS H3300 |
| Connection Type | Butt Weld (BW) / Socket Weld (SW) / Threaded (Rc/NPT) |
| Pressure Range | Class 150# / 300# / 600# / 900# |
| Operating Temp. | -20℃ ~ 300℃ |
| Tensile Strength (C70600) | 310 MPa (min.) |
| Hardness (C70600) | 75 HRB (typical) |
| Resistivity | 0.5 μΩ·m |
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