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Pipes(cast Iron)
1.Manufacturing process
Cast iron pipe is manufactured by the pit, horizontal or centrifugal method. In the vertical pit method: - mold is made by ramming sand around a pattern and drying the mold in an oven. A core is inserted in the mold and molten iron is poured between the core and the mold. In the horizontal method: - a machine is used to ram sand around horizontal molds that have core bars running through them. The molten iron is poured into the molds from multiple-lipped ladle designed to draw the iron from the bottom to eliminate the introduction of impurities. In the centrifugal method: -- sand-lined molds are used that are placed horizontally in centrifugal casting machines. While the mold revolves, an exact quantity of molten iron is introduced, which, by action of the speed of rotation, distributes itself on the walls of the mold to produce pipe within a few seconds.
Some manufactured pipes
2....Exporting and importing of cast Iron pipes in world---
In 2021, Cast Iron Pipes were the world's 802nd most traded product, with a total trade of $1.69B. Between 2020 and 2021 the exports of Cast Iron Pipes grew by 20.7%, from $1.4B to $1.69B. Trade in Cast Iron Pipes represents 0.0081% of total world trade.
Exporters
In 2021 the top exporters of Cast Iron pipes were China ($397M), France ($241M), United Arab Emirates ($205M), India ($180M), and Germany ($122M).
Importers
In 2021 the top importers of Cast Iron Pipes were Kuwait ($117M), France ($98.9M), Saudi Arabia ($96.6M), Germany ($84.3M), and Oman ($81.5M).
Tariffs
In 2018 the average tariff for Cast Iron Pipes was 5.78%, making it the 735th lowest tariff using the HS product classification.
Ranking
Cast Iron Pipes ranks 565th in the Product Complexity Index (PCI).
3.Problems with cast Iron pipes
Cast iron pipes provide a water-tight seal and protection against root intrusion and can withstand severe ground movement such as in an earthquake, but rust and corrosion are its greatest problems. As corrosion sets in, the pipes become weak, and severe corrosion can also cause the collapse of the pipe, leading to additional problems. Over time, the interior of the cast iron pipe begins to rust as it continuously meets wastewater. This eventually leads to a buildup of rust and a consequent reduction in the hydraulic capacity of the pipe. The rust will also create a rough surface that reduces its flow velocity. Broken of Iron Pipes due to Roasting.
