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4 Cards in this Set
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- Back
- 3rd side (hint)
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What are the main advantages of copper? What are the main disadvantages of copper? |
The main advantages of copper as a piping material Malleability Ductility Good resistance to corrosion Since copper have smooth surface finish the flow carrying capacity is 20% greater than steel and iron pipe
The main disadvantage is it’s high coefficient of expansion. Copper expands 1.4x more than steel and iron and then 1.6x more than grey cast iron |
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Alloys |
Copper is a pure metal and can be mixed with other pure metals to form alloys. Copper added in small proportion to steel pipe greatly improves the corrosion resistance of the steel Also known as copper bearing steel |
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What is brass? What is red brass? What is yellow brass? |
Brass = copper + zinc Red brass 85% Copper 15% zinc Yellow brass 66% copper 34% zinc Red brass is better for corrosion resistance. Yellow brass is harder wearing Used in standard valves, faucets, traps, etc Brass has higher rate of expansion than copper |
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What is bronze |
Bronze = 90% copper 10%tin Used for underground water service Bronze has higher rate of expansion than copper but less than brass |
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