Insulated Refrigerating Copper Twin Pipe with Nuts for Air Conditioner

To be a high-quality supplier in the world's professional Brass Tube, Copper Alloy Tube, Copper Pipes For Refrigeration industry is our goal. Last but not the least, we also pay more attention to training our managerial personnel, technicians and workers in planned way. After years of quality management, our sales volume and brand image have already possessed certain strength.

Introduction of Cupro Nickel Coil Tube

 

Cupro nickel coil tube is a coil tube made of cupronickel alloy. Cupronickel is an alloy containing nickel and strengthening elements such as iron and manganese. Cupronickel is highly resistant to corrosion in seawater.

Cupro-Nickel Tubes (70%/30%) : This alloy provides corrosion resistance in high velocity (from 1 to 4 m/sec) waters, including sea water. The alloy is relatively insensitive to stress corrosion. It has good cold and hot working properties and is readily weldable.

Cupro-Nickel Tubes (90%/10%) : This alloy also has very high erosion and corrosion resistance. It has very high weldability, easy for installation and high anti-fouling properties against sea microorganisms. Relatively high iron content provides better impingement attack resistance. The alloy is unique to stress corrosion cracking.

 

Features of Cupro Nickel Tube

 

• High strength
• High resistance to pitting, crevice corrosion resistance
• High resistance to stress corrosion cracking, corrosion fatigue and erosion
• Good sulfide stress corrosion resistance
• Low thermal expansion and higher heat conductivity than austenitic steels
• Good workability and weldability.
• High energy absorption
• Excellent finish
• Durable

 

Properties of Cupro Nickel

 

Copper Nickel Products have excellent corrosion resistance, inherent resistance to macrofouling, and good tensile strength and ductility. They also have excellent thermal conductivity and expansion characteristics suitable for heat exchangers and condensers, as well as good thermal conductivity and ductility at cryogenic temperatures.

Due to the ease with which copper alloys with nickel, and the simplicity of their structures, the alloys are ductile and easily manufactured. Cold working increases the strength and hardness of each particular alloy; heat treatment does not harden them. 90/10 (C70600) and 70/30 (C71500) can be welded or brazed together to produce Copper-Nickel 90 / 10 Tubes and Copper Nickel 70 / 30 Tubes, respectively. However, autogenous welding and oxyacetylene procedures are not advised.

Weld consumables of Copper Nickel 70 / 30 Tubes rather than Copper-Nickel 90 / 10 Tubes are usually chosen, and no post-weld heat treatment is needed. A 65 percent nickel-copper welding consumable may also be utilized to weld straight to steel, avoiding iron dilution. The C71640 alloy is often utilized as seamless tubing and expanded rather than welded into the tube plate. Silver-based brazing alloys are required for brazing. If there are any tensions in the Cu–Ni being silver brazed, they must be avoided, since any stress can induce intergranular penetration and acute stress fracturing. As a result, any possible mechanical stress must be fully annealed. Cu–Ni alloys have weathered the test of time and are still widely employed in naval vessels, commercial ships, multiple-stage flash desalination, and power plants. On offshore constructions and boat hulls, they've been utilized as splash zone panels, but they've also been used for solid hulls.

 

Alloy And Production Standard

 

C70600 (ASTM B111 or ASME SB111)

CuNi10Fe1Mn (EN12451 or EN12449 or DIN)

CN102 (BS British Standard)

C7060 (JIS Japanese Industrial Standards)

 

Chemical Composition

 

9.0≤Ni≤11.0 ; 1.0≤Fe≤1.8; Cu Rem

 

Dimension/Size

 

Outside diameter range : 5mm~45mm

Wall thickness range : 0.3mm~4mm

Maximum weight: 45kg/coil

 

 

Application Industries for Cupro Nickel Tubes

 

Cupro nickel coil tube, with the special properties of nickel and copper, is extensively used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural gas processing, and sewage treatment.

These 90-10 / 70-30 Nickel Pipes & Tubing is use in various industries like :

• Copper Nickel 90-10 Seamless Pipes uses in Oil and Gas Pipeline
• ASTM B111 Nickel 70-30 Seamless Tubing uses in Chemical Industry
• Grade 90-10 Copper Nickel Welded Pipe uses in Plumbing
• Nickel ASTM B151 70-30 Welded Tubes uses in Heating
• ASTM B111 90-10 Nickel Seamless Pipe uses in Water Supply Systems
• ASTM B466 70-30 Copper Nickel Welded Pipe uses in Power Plant
• Alloy 90-10 ERW pipes uses in Paper & Pulp Industry
• 70-30 Nickel EFW Tubes uses in General Purpose Applications
• ASME SB466 Alloy 90-10 Welded Pipe uses in Fabrication Industry
• Copper Nickel 70-30 Pipes uses in Food Processing Industry
• ANSI Nickel 90-10 Tubes uses in Structural Pipe

 

Marine Types of Cupronickel Alloys

 

Cupronickel 90/10

Composed of 10% nickel and is highly suitable for your marine engineering projects. Supplied as a wrought cupronickel, it guarantees high corrosion and biofouling resistance. When enriched with Iron and manganese, you have a superior CuNil alloy with enhanced resistance to water flow and seawater corrosion. The alloy is an ideal choice for your marine and other industrial applications such as marine water cooling systems, condenser tubes for power plants, and heat exchangers.

CuNi 70/30

This CuNi alloy is made of 70% copper and 30% nickel. It provides superior strength and a higher water flow resistance compared to copper 90/10! The alloy is enhanced with manganese and iron for improved corrosion resistance. You find it commonly used in marine and other industrial sectors.

CuNi 66/30/2/2

This alloy is an improved type of copper 70/30. It is made of 66% copper with both iron and manganese constituting 2% each. The alloy comes in a tube form and is suitable where your application requires excellent resistance to high water flow rates. It is the ideal CuNi alloy type to choose for your power plant's condenser tubes among other industrial applications.

CuNi 80/20

This CuNi alloy consists of 20% nickel and is easy to fabricate. Based on your industry requirements, you can purchase it as a bar, tube, or wire. With its excellent corrosion resistance, you will find it suitable for a wide range of marine engineering and electronic applications.You can use it in the manufacture of condensers and heat exchanger tubes. You can also use its wire in the electronics industry in the production of resistors among others.

Non-Marine Cupro Nickel Alloys

Cupronickel 55/45: Also known as constantan or Eureka, the alloy constitutes 55% copper and 45% nickel. And so, if you are in the manufacture of thermocouples, resistors, or rheostats, this is the ideal cupro-nickel alloy wire worth considering.

CuNi 66/34: Composed of 34% nickel, this CuNi alloy boasts low electrical resistance with excellent corrosion resistance. You can use the alloy to manufacture low-temperature heating cables, low-resistance circuit breakers, and low-voltage electrical parts among others.

Copper-nickel 75/25: This CuNi alloy type is composed of 25% nickel and is extensively used in coinage. Because of its durability and cost-effectiveness, you will find also its use in industrial and energy transfer sectors.

 

 

With many years of industry experience, strong market adaptability, stable and reliable product performance, and rich and complete product line, we have won a good reputation in the Insulated Refrigerating Copper Twin Pipe with Nuts for Air Conditioner industry, and our products have a strong competitive advantage in industry competition. We establish close strategic partnerships with relevant companies with competitive advantages, thereby improving the overall competitiveness of the supply chain system. Enterprises should take equal opportunities in market competition and use the market competition mechanism of survival of the fittest to form a strong market competition structure and improve their competitiveness.

Hot Tags: cupro nickel coil tube, China cupro nickel coil tube manufacturers, suppliers, factory, Large Diameter Brass Tubing, Small Diameter Copper Tubing, Copper Tube Used In Air Conditioner, Alloy C61400 Al bronze pipe, Ornamental Hexagon Brass Tube, Square Brass Tubing