Copper (DHP | DLP | DPA)
Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity.
This is used in vrv-vrf, marine & industrial units, sanitary & heating application, medical gas pipelines etc.
Good resistance to corrosion in fresh water.
Working temperature up to 250 degree Celsius and cooling water speed is 1.5 m/s.
Brass (63/37 | 70/30 | 85/15)
Brass is an alloy of copper and zinc, in proportions which can be varied to achieve varying mechanical and electrical properties. ... Both bronze and brass may include small proportions of a range of other elements including arsenic, lead, phosphorus, aluminum, manganese, and silicon.
Admiralty Brass (CuZn28SNI) Cz111:
Will operate successfully in steam condensers and coolers for land stations where the river waters are brackish and conditions are slightly acidic or alkaline.
It is also resistant to sulphur bearing gases.
Cooling water speed is 2.0 m/s and temperature up to about 200 degree Celsius.
Aluminum Brass (CuZn20A1.2) Cz110:
Extensively used material and one of the most popular.
This alloy forms a protective film which has self healing properties.
This film is dependant on oxygen dissolved in the water and will not renew itself in polluted or stagnant water.
High resistance to corrosion in clean seawater or where land conditions are difficult.
Cooling water speed approx 2.5 m/s working temperature up to 250 degree Celsius.
Cupro Nickel Alloy (CuNi 10 FE 1 Mn) Cn102:
Widely used in condensers, coolers and heat exchangers where corrosion resistance and erosion is paramount, yet maintaining a high thermal conductivity rate.
To be used preferably in marine conditions.
Forms a protective film which is multi layered in flowing sea water.
Resist marine befouling.
Cooling water speed is 2.5 m/s working temperature approx. 250 degree Celsius.
Cupro Nickel Alloy (CuNi 30 Mn 1 FE) Cn107
Improved corrosion resistance and almost insensitive to stress corrosion this alloy will give superior result in high velocity polluted water including sea water.
A reduced thermal conductivity level but will retain its strength at moderately increased temperatures.
Cooling water is speed up to 4.5 m/s.