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Introduction of Centrifugal Ductile Iron Pipe and K9 Grade Ductile Iron Pipe

Centrifugal ductile iron pipes are cast iron pipes for water supply, drainage and gas transmission pipelines, including cast iron straight pipes and pipe fittings.

K9球墨铸铁管

Ductile iron pipe k9 refers to the pipe made by high-speed centrifugal casting of centrifugal ductile iron machine after adding nodularizing agent to casting molten iron above No. 18, referred to as ball pipe, ductile iron pipe and ductile cast pipe. Mainly used for the transportation of tap water, it is an ideal material for tap water pipelines. The essence of cast iron steel pipe is ductile iron pipe, because ductile iron pipe has the essence of iron and the performance of steel, so it is called this.

K9球墨铸铁管

Product introduction of ductile iron pipe

Centrifugal ductile iron pipes are divided into continuous ductile iron pipes and centrifugal ductile iron pipes according to different casting methods

Ductile Cast Iron Pipes

The main components of ductile iron pipes are carbon, silicon, manganese, sulfur, phosphorus and magnesium. Executive standard GB/T13295-2003 ISO2531/2003

Ductile cast iron pipes are defined as pipes made of casting molten iron above No. 18 after adding nodulizers, and then centrifugally cast by a centrifugal ductile iron machine at high speed. They are called “Ductile Cast Iron Pipes”, referred to as ball pipes, Ductile iron pipe and ductile cast pipe, etc.

Classification of ductile iron pipes

Compared with gray cast iron pipes, ductile iron pipes have higher strength, better toughness, thinner pipe walls, less metal consumption, and can withstand higher pressures. The effective lengths are 5 meters and 6 meters; they are divided into P and G according to the wall thickness. two levels. It is the development direction of cast iron pipe.

The connection between pipes adopts socket type or flange type interface; according to the function, it can be divided into two types: flexible interface and rigid interface. The flexible interface is sealed with a rubber ring, which allows a certain degree of rotation and displacement, so it has good shock resistance and sealing performance. It is easier and faster to install than the rigid interface. According to different casting methods, the labor intensity is small.

Introduction of K9 ductile iron pipe

K9 ductile iron pipe has good external pressure resistance, which can reduce the requirements for the production of pipe bed and protective layer, making pipe laying economical and reliable; in addition, measures such as external zinc spraying, asphalt paint spraying, and inner cement lining ensure the cast pipe Internal and external corrosion resistance. The quality of our company’s zinc spraying conforms to the requirements of ISO8179. The minimum amount of zinc spraying per square meter of pipelines is 130g. Strong focus. Our company’s ductile iron pipe standard product technical standard The k9 ductile iron pipe produced by our company adopts the water-cooled metal type centrifugal casting process, and the K9 grade and T-type socket interface pipes are produced according to the ISO2531 standard.

1. External anti-corrosion The outer surface of the entire pipe is sprayed with zinc for anti-corrosion treatment—the amount of zinc sprayed according to ISO8179 standard is greater than 130 grams per square meter. Anti-corrosion paint sprays anti-corrosion paint on the basis of zinc-sprayed anti-corrosion treatment on the outer surface of the pipe——Implement the ISO8179 standard anti-corrosion paint thickness greater than 70um, and use non-toxic and high-chlorinated resin paint.

2. The inner surface of the lined pipe is coated with cement mortar lining – the ISO4179 standard is implemented, and water-washed sand and high sulfur-resistant cement are used as raw materials.

3. The sealing rubber ring for the interface is made of natural rubber with extremely high fatigue strength—implementing ISO4633 or GB13295 standards. Carry out a hydrostatic test on each pipe, and hold the pressure for 15 seconds. The amount of zinc sprayed on the outer surface of the pipe is >130g/m2; the thickness of the anti-corrosion paint is >70um. DN350-600 Hydrostatic test pressure 4.0Mpa DN700-800 Hydrostatic test pressure 3.2Mpa

The characteristics of k9 ductile iron pipe: it has the essence of iron, the performance of steel, excellent anti-corrosion performance, good ductility, easy installation, mainly used for water supply, gas transmission, oil transportation, etc. in municipal and industrial and mining enterprises.

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