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They are similar to cast iron pipes to some extent but if compared with cast iron, they are more light, easy to cut, threaded and worked. They give neat appearance, if used for interior work. However, they are costly and less durable then cast iron, pipe. They are manufactured by rolling the flat plates of metal to the required, diameter and then welding the edges. Their diameter is limited up to 50 cm. They, are joined together by coupling or screwed and socket joint.

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To prevent cast iron pipes against corrosion, they are lined with 1:3 cement mortar, centrifugally inside the pipe. Thickness of cement mortar coating is 2.5 to 6.0 mm, depending upon the size of pipe. After applying the lining the pipe is cured. The, cement lined cast iron pipes have very small coefficient of friction than unlined Cl, pipe and lining is not injured by cutting or drilling the pipe., , Cement Mortar Lining (CML)

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A homogeneous structure composed of asbestos fiber and cement combined under, pressure, in which a strong bond is created between the two is called asbestos, cement pipe. These pipes are generally available in size from 0.1 m to 0.9 m in, diameters.

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Advantages of asbestos cement pipes, 1. Easy to transport - These pipes are easy transport because of light in, , weight., 2. Corrosion Resistant — These pipes are corrosion resistant., 3. Flexibility - These are highly flexible and can permit as much as 12°, , deflection., 4. Labour Cost - its labour cost is low as it do not require skilled labour., , Disadvantages of asbestos cement pipes, These pipes are not very much durable, , The market value of these pipes is high, , These pipes have low strength. They are soft and brittle, They can be easily damaged during transportation, They can be used as small size distribution of pipes, , aw

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Copper pipes are not liable to corrosion even if water contains salts or acids. These pipes, can be easily bent and also do not sag if used for hot water supply. These pipes are, only used in making gooseneck in the house connections and carrying hot water inside, the building., , Lead pipes are not used in India, because lead cause poisoning. They can be given bends, easily and also can withstand high pressure. These pipes are mostly used in sanitary, fittings. They are used for chlorination and alum dosing., , Lad rr?, , A dull, silver-gray color that is easily scratched with a, coin. Use a magnet - strong magnets will not cling to, lead pipes, , Copper ey, , The color of a copper penny ry