DI Socket Fittings with K-type Joint

Material:

Body：Ductile iron grade 500-7/ 450-12 in accordance with ISO 1083    

Gasket: Rubber E.P.D.M. in accordance with EN 681.1    

Fluid temperature: 0°C-50°C, excluding frost    

I. Reliability Assurance in High-Voltage Scenarios

The K-type joint adopts a mechanical flexible connection design. It forms a seal by pressing the rubber sealing ring with bolts and can withstand a working pressure of over 1.6MPa, far exceeding the low-pressure application range of the T-type interface (≤1.0MPa). This structure performs particularly well in scenarios with intense pressure fluctuations such as pump station outlets and valve Wells. It can effectively resist the impact of high-pressure media and prevent interfaces from failing due to sudden pressure changes.

Second, the dual advantages of tensile strength and rigidity

Compared with the axial expansion of the T-type interface (≤30mm), the strict control of the axial displacement of the K-type joint, combined with the tensile strength of ductile iron above 420MPa, can significantly enhance the uplift resistance of the pipeline system. This characteristic can prevent pipelines from sliding due to gravity or external forces in areas with significant terrain undulations or rocky strata, and is particularly suitable for slope laying or areas with frequent earthquakes. For instance, actual measurements in a city prone to earthquakes show that the damage rate of pipe networks using K-type joints has decreased by 85%, fully demonstrating its seismic resistance and anti-deformation capabilities.

Iii. Quality assurance in line with international standards

Our K-type joints strictly follow the AWWA C110 standard, covering key indicators such as dimensional accuracy, pressure rating, and material performance, to ensure compatibility with the mainstream ductile iron pipe systems worldwide. This certification is not only the entry threshold for the North American market, but also widely recognized in Europe, Southeast Asia, and other regions, providing necessary compliance support for pipeline companies to undertake international projects.

Four. Convenient maintenance and long-term cost optimization

The pressure flange structure of the K-type joint allows for local maintenance and rubber ring replacement without the need to disassemble the entire pipeline. In a certain industrial wastewater treatment project, by regularly tightening bolts and replacing sealing rings, the service life of K-type joints has been extended to over 30 years, far exceeding the 15-20 year cycle of ordinary interfaces. Combined with the natural lifespan of over 50 years for ductile iron, this can significantly reduce replacement costs and downtime losses throughout the entire life cycle.

V. Advantages in Environmental Protection and Sustainability

Ductile iron material is 100% recyclable. During the production process, a triple protection system of zinc coating, anti-corrosion, and epoxy coating is adopted, reducing the risk of chemical pollution. Meanwhile, the non-toxic formula of the rubber sealing ring complies with the standards for drinking water transportation. The inner wall is lined with food-grade cement mortar to prevent water pollution and meet the requirements of modern municipal engineering for green building materials.

Six. Flexibility in precisely adapting to complex working conditions

For equipment connections that require frequent disassembly, K-type joints can achieve a seamless connection with steel pipes and concrete pipes through a flange conversion design. In a certain petrochemical project, the K-type joint was used in combination with a self-anchoring interface, successfully addressing the issue of fixing pipelines with a slope of more than 15° and avoiding the high costs and project delays associated with traditional pier pouring.

Summary

Choosing our MIDAS Company's DI Socket Fittings with K-type Joint essentially means choosing a safe, efficient, and sustainable piping system solution. Whether it is high-pressure industrial pipeline networks, municipal projects with strict seismic requirements, or multinational projects that pursue cost optimization throughout the entire life cycle, K-type joints can create a differentiated competitive advantage for pipeline companies through precise performance matching and reliable quality assurance. Our products are not only connecting components but also the "underground steel bars" that safeguard the lifeline of the city.