What is the cast iron tube?

Cast -iron tube is a metal tube made by melting iron together with a large amount of iron and metal scrap and throwing it into a mold. It usually carries waste water and waste water and is also used for ventilation and transport of drinking water. The cast -iron tube comes in eight classes, and over H, rated in the increments of 100 feet of the head (30 meters of the head), which is the pressure generated by a given water height. One leg of the head is equal to 0.434 psi (305 kg/m2).

While the cast iron was invented in China in the fourth century B.C. was not used for the pipeline much later. The first documented cast -iron tube was laid in Germany around 1455 and the French laid a net iron pipeline to supply water to the city of Versailles in the 16th century. In 1804, Philadelphia became the first city in the United States to use cast iron for water. Although it is not used for water transport as widely as materials as copper, the cast iron pipe continues to use wastewater and waste lines around the world. TowerTh more cities in Europe and the United States contain thousands of kilometers of cast iron tubes, many of which have been in operation for more than 100 years.

There are two varieties of cast iron pipes, each with significant connection methods. HUBLESS pipes do not have a charge, allowing the clutch to be mounted on the straight ends of the pipe. The joint can then be tightened to form a seal. The second variety is the pipeline hubs and spigots, whose fittings are unique. In this format, a pin or straight end of one tube is made to fit into the center of the other. A compression seal is usually used to seal this joint.

Early ways of production of cast iron pipeline by creating in horizontal and vertical forms retreated at the beginning of the 20th century of the centrifugal process of the Delavaud. To complete this process, the mold is set when the melting is slowly poured and then the waters are cooledou. Iron traction, invented in 1948, is produced by a similar process, but with the addition of trace amounts of magnesium or Cero to create a stronger and more flexible metal. They have largely replaced cast iron pipes for use in new water and waste waters. The tubes of secret iron pipes have flanges that are threaded or welded at the ends of the pipeline and are connected by mating flange and connecting them to screws.