Wills International

Girgaon, Mumbai, Maharashtra

Wills International offers a wide range of Seamless Copper Tubes. These tubes are supplied in both Hard Drawn Straight Length & Bright annealed Pancake Coils. These tubes are manufactured as per International and National Standards required by client.
All tubes are electronically tested by Eddy Current method, as per the requirements of ASTM E 243.
Indigo tubes are 100% carbon free. All tubes are cleaned and sample tested to meet the residual requirements as specified by the codes at 0.038g/m2 (0.35g/ft2).
Coils are normally furnished in ‘O60’ temper and straight lengths in H58 temper.
100% RoHS Compliance.

Technical Specification

• Specification - ASTM B68 / ASTM B75 / ASTM B280 / ASTM B88 / JIS H 3300 / EN1057 or BS2871 - PART 2:1972 / DIN 1754/8905/ IS2501 / Internal Client Specifications.
• Size - 1/8” (3.2mm) OD to 13/8” (34.9mm) OD in Coil Form & 2mm OD to 41/8” (104.8mm) OD in Straight Length
• Standard Length - 50 Feet/100 Feet in Coil Form & 5.8 Meters in Straight Length. Also as per client requirements
• Thickness - 10SWG (3.2mm) to 27SWG (0.4mm)
• Temper - "O" (Soft Annealed)/ H58 (Drawn General Purpose) Temper

• 70/30 Cupro Nickel is mainly preferred when the severity of service condition (Cooling water, steam, condensate, temperature, etc.) is such as to virtually rule out all other copper metals.
• Due to its hardness and to the type of oxide whereby its surface is self-protected, 70/30 Cupro Nickel has excellent resistance to impingement and erosion-corrosion by of suspended solids in sea water flowing at up to 3-3.5 m/s (10-11.5 ft /s).
• Like all Cupro-nickels, 70/30 Cupro Nickel is virtually immune from stress-corrosion cracking.
• It can be very sensitive to deposit attack and is therefore not recommended for stagnant or slow moving (under 1 – 1.2 m/s or 3.5-4 ft/s) water.

70/30 Cupro Nickel is very widely employed in water desalination plants, especially in the most critical areas such as the heat reject and brine heater stages, as well as in the under cooling areas of power station condensers, in the chemical, petrochemical and food processing industries and, more generally, in all applications where top corrosion resistance is required from both the shell and tube side.

  Product Application Areas

• Chillers
• Heat Condensers & Exchangers
• Power Plants
• Refineries
• Desalination Plants
• Ship Building & Ship Repairs
• Defence
• High Capacity Power Plants
• Distiller Tubes
• Evaporators & Ferrules.

Product Application Areas

• Chillers
• Heat Condensers & Exchangers
• Power Plants
• Refineries
• Desalination Plants
• Ship Building & Ship Repairs
• Defence

To avoid the risk of deposit attack, it is generally recommended to never operate at water velocities below about 0.8-1 m/s (2.5-3.5 ft/s). 90/10 Cupro Nickel can also be used, with appropriately reduced flow velocity, in contact with water containing some sulphides or suspended solids. It is also often selected for its good mechanical properties, both at room and relatively elevated temperatures.

Details :

• 90/10 Cupro Nickel is widely used in sea water. It has very good corrosion resistance to clean moderately polluted marine or estuary water, even containing dissolved incondensable gases.
• This alloy is virtually immune from stress-corrosion cracking and hot spot denickelification.
• In clean sea water, a velocity of up 2.2-2.5 m/s (7.5-8.5 ft/s) is accepted while 4 m/s (13 ft/s) is the upper limit for clean fresh or slightly saline solutions.