Established in 1998, China Guanda Hose Technology Co., Ltd. is a professional cast iron pipe manufacturer and wholesaler of hoses and tubes. Our annually capacity of various kinds of hoses is more than 5,000,000 meters. Our customized cast iron pipes products are applied in industrial equipment, hotels, villas, toilets, and kitchens. They are widely used in the field of aerospace, metallurgy, petrol-chemical, machinery, architecture, shipping, vacuum, power and light industries.

Our products are water - cooling metal centrifugal casting ductile cast iron pipes such as "T""S""N1"types of joints with the effective length 6m; nominal diameter ranges form DN80mm to DN2400mm, 4179, according to the standard ISO2531, 8179.Smelting and Molten Iron Spheroidization After smelting by mid - frequency furnace we treat molten iron with spheroidizing agent to adjust its composition;
Centrifugal Casting and Extracting from Molds
The qualified cast ductile iron pipe is put into an annealing furnace to attain the required metallographic structure of ductile iron. The molten iron sets into a ductile iron pipe and cooled down by water then extracting from molds according to set time strictly. Cement mortar is lined onto the internal surface of each ductile iron pipe to prevent water from being polluted and to increase ability of transmitting water. All pipes are externally coated by metallic zinc and sprayed by bitumen according to ISO8179. All pipes are internally centrifugal lined by cement mortar lining according to ISO4179.

Cast-iron pipe began to become available in the mid-1700s for municipal water service. The first large-scale use of cast-iron pipe for distribution of water occurred in 1664 at Versaille, France. The first cast-iron pipe manufactured in the United States was produced in a foundry in Weymouth, New Jersey, in the early 1800s. The city of Philadelphia began installing cast-iron pipe in its water distribution system circa 1804-1810. In fact, Philadelphia was the first American city to use cast-iron pipe exclusively -- due to its greater longevity and the fact that water pressure that could be maintained with it was higher than wood pipe could handle.Cast iron pipe, while most often found in older homes, is still used today for more expensive homes because it is quieter than ABS pipe, and therefore you will not hear the sound of water flowing through it.