K-Type Push On Ductile Iron Pipes Featuring Advanced Internal External Protection for Longevity DI pipes
Brand TOPSUN
Product origin China
Delivery time 30 days
Supply capacity 10,000 tons per year
Our K-type and push-on Ductile Iron (DI) pipes are engineered for high-performance applications in municipal water supply, sewer systems, and industrial fluid transport. Their robust design ensures reliable service in demanding environments, supported by proven success in numerous global infrastructure projects. Key features include exceptional pressure rating and leak-proof joints, making them a preferred choice for contractors and engineers seeking durability and efficiency in pipeline installations.
Internally, our DI pipes are protected with advanced cement-mortar or epoxy linings, preventing corrosion and ensuring water quality compliance. Externally, they feature durable polyethylene sleeving or zinc-aluminum coatings combined with bitumen for superior resistance to aggressive soils and harsh environmental conditions. Our continuous R&D focuses on enhancing these protective technologies, resulting in longer service life and reduced maintenance costs for our clients across various international projects.
Backed by strong production capabilities, we maintain a significant inventory of DI pipes to meet urgent project demands and large-scale orders. Our manufacturing plants utilize state-of-the-art automation and strict quality control processes, enabling us to achieve substantial annual sales volumes while consistently meeting international standards. This production strength, combined with our extensive global distribution network, ensures timely delivery and reliable support for both stock items and customized pipe solutions.

All specifications products can be customized according to customer requirements | |
Product Name | Ductile iron pipe |
Grade | K9, K10, K11, K12,K9, K8, C25, C30, C40, etc. |
Size | Outside Diameter: 98mm-1255mm Inside Diameter: 80mm-1200mm Wall Thickness: 6mm-153mm Length: 6m, cut to 5.7m, or as required. |
Standard | ISO2531, EN545, EN598, etc |
Internal coating | a). Portland cement mortar lining b). Sulphate Resistant cement mortar lining |
c). High-Aluminum cement mortar lining | |
d). Fusion bonded epoxy coating | |
e). Liquid epoxy painting f). Black bitumen painting | |
External coating | Spiral Shap,Herringbone Shap,Crescent Shap |
Certificate | Hot rolling and cold rolling |
Delivery Time | Usually within 10 days,Arrange the delivery time according to the quantity |
Application | Water supply project, drainage, sewage, irrigation, water pipeline, etc. |
Engineered for critical infrastructure, our Ductile Iron (DI) Pipes with push-on joints deliver unmatched structural integrity and installation efficiency for water and wastewater networks. Their superior strength, derived from advanced metallurgy, reliably withstands high internal pressures and external loads. This robust construction, combined with the quick-assembly push-on joint system, significantly reduces project timelines and ensures long-term performance in demanding municipal and industrial applications.
We ensure durability through a comprehensive protection system for both the internal and external surfaces of our DI pipes. Internally, a smooth cement-mortar or epoxy lining safeguards water quality and maintains excellent flow characteristics. Externally, a robust barrier of zinc and bitumen or polyethylene coating provides maximum resistance against corrosive soils. This dual-protection technology, a result of continuous R&D, is proven to extend the pipeline's service life for decades, minimizing maintenance costs.
Our production capability and extensive inventory guarantee reliable support for projects of any scale. Utilizing automated foundries and strict quality control, we achieve high annual sales volumes while meeting international standards. This manufacturing strength allows us to maintain substantial stock of K-type and push-on DI pipes, ensuring timely delivery and making us a trusted global partner for both urgent needs and long-term infrastructure development.
Ductile iron pipes are extensively utilized in modern water and wastewater systems due to their exceptional strength, durability, and corrosion resistance. Their high tensile strength and impact resistance make them ideal for withstanding high internal pressures and external loads, including traffic and unstable soil conditions. This ensures long-term reliability and a service life often exceeding 100 years.
A key advantage is their superior corrosion resistance, frequently enhanced by protective linings and coatings. Furthermore, ductile iron pipes offer excellent hydraulic capacity, maintaining flow efficiency over time. Their robust design also provides high leak-tightness, a critical factor in conserving valuable water resources.
Ease of installation, facilitated by a simple push-on joint system, reduces project time and costs. These combined properties make ductile iron pipes the preferred choice for municipal water supply, sewer mains, and industrial applications, offering a cost-effective and sustainable solution for essential infrastructure.

Our K-type Ductile Iron (DI) Pipes, featuring user-friendly push-on joints, are engineered for efficiency in critical sectors like municipal water supply and wastewater management. This robust combination ensures rapid, leak-proof installation, significantly reducing project timelines and labor costs. The inherent strength of DI pipes makes them the preferred choice for withstanding high operating pressures and external loads, guaranteeing long-term infrastructure integrity in diverse environments, from dense urban networks to industrial complexes.
Beyond mechanical strength, we invest heavily in advanced corrosion protection technologies. Internally, pipes are lined with cement mortar or specialized epoxy to maintain water quality and flow efficiency. Externally, a robust shield of zinc and epoxy or polyethylene coating is applied, offering superior resistance to aggressive soils. This dual-protection system is a result of continuous R&D, extending the pipeline's service life to over a century and minimizing lifetime maintenance costs, a key factor in our successful global projects.
Backed by state-of-the-art automated foundries and stringent quality control, we possess significant production capacity to support large-scale projects and ensure consistent product quality. Our global sales volume reflects the market's trust in our DI pipes. To further serve client needs promptly, we maintain a substantial inventory of standard sizes and fittings, enabling quick delivery and providing a reliable supply chain for both planned and urgent infrastructure developments.
CUSTOMERS & MARKET

Q: What's your qualification in this product ?
A: We have been engaged in this industry for decades with seasoned export team. All the product is strictly conformed to the international standard ISO2531:1998,EN545-2002 and other related standard.
Q: How long is your delivery time ?
A: Generally it is 5-10 days if the goods are in stock. or it is 20-30 days if the goods are not in stock, it is according to quantity.
Q: What's your terms of payment ?
A: 30% T/T in advance , balance before shipment or against L/C . And D/P , D/A ,L/C for free options.
Q: What's your trade terms ?
A: FOB , CIF , CFR as per client's requirements.
If you have any other questions , please feel free to contact us.








