Ductile iron tees belong to diversion and confluence pipe fittings used in low- and medium-pressure civil pipeline networks. The material is QT450-10 high-toughness ductile iron. Through spheroidizing treatment, graphite is distributed in spherical form, giving it advantages over ordinary gray cast iron tees in tensile strength, elongation, and resistance to foundation settlement deformation. The products are manufactured in accordance with ISO2531, EN545, GB/T13295, and AWWA C110 standards. Specifications cover DN25–DN2000, suitable for PN10, PN16, PN25, and PN40 pressure ratings. Connection methods include flange, socket, grooved, and mechanical joint (MJ). No hot work welding is required, making them suitable for rapid construction and explosion-proof renovation scenarios. Finished products can undergo asphalt anti-corrosion, epoxy spray coating, hot-dip galvanizing, and other treatments, used for buried, open-air laying, and heavy-load rolling and other outdoor working conditions. We provide products and selection support for municipal infrastructure, fire protection, gas and heating, water conservancy and environmental protection, and overseas infrastructure projects. For specific specifications and configurations, please contact us for confirmation.
Overview
Ductile iron tees are pipe fittings used in municipal water supply and drainage, fire protection, gas and heating, sewage treatment, and farmland water conservancy networks for medium diversion, merging, and branch direction changes. We use QT450-10 ductile iron material, and through spheroidizing treatment, the graphite is distributed in a spherical form, making the product superior to ordinary gray cast iron tees in toughness and resistance to settlement deformation. The products are produced in accordance with ISO2531, EN545, GB/T13295, and AWWA C110 standards, with specifications covering DN25–DN2000, suitable for PN10, PN16, PN25, and PN40 pressure ratings. Connection methods include flange, socket, grooved, and mechanical joint (MJ), which can meet different construction conditions and maintenance needs.
Key Features
First, the material has good toughness. The graphite of QT450-10 ductile iron is distributed in a spherical form, and its tensile strength and elongation are superior to ordinary gray cast iron. When buried, it can withstand heavy road load rolling and uneven foundation settlement. Second, complete specifications. Full diameter coverage from DN25–DN2000, supporting PN10 to PN40 pressure ratings, with multiple connection methods available: flange, socket, grooved, and mechanical joint. Third, integrally cast and formed. No spliced welds, dense structure, uniform pressure bearing, reducing hidden risks of leakage and cracking. Fourth, flexible anti-corrosion methods. Asphalt anti-corrosion, epoxy spray coating, hot-dip galvanizing, and zinc layer anti-corrosion can be applied, adapting to soil acid and alkali erosion and outdoor humid environments. Fifth, convenient installation. Grooved and mechanical joint styles require no hot work welding, suitable for fire protection and explosion-proof renovation and rapid construction. Sixth, customization is supported. Non-standard pipe diameters, wall thicknesses, branch angles, and special interfaces can be produced according to drawings, samples, or technical agreements.
Applications
Ductile iron tees are suitable for civil pipe networks with medium and low pressure and large flow, buried heavy loads, outdoor open-air conditions, and geological settlement areas. In municipal water conservancy, they are used for buried water supply and drainage networks of urban main and secondary roads, centralized water supply in townships, farmland irrigation water transmission, and rainwater collection and conveyance projects. In fire protection and explosion-proof applications, they are used for building fire sprinkler networks, park fire main pipelines, and explosion-proof quick-install networks in flammable and explosive areas; grooved connections require no hot work. In gas and heating applications, they are used for urban low-pressure gas transmission, centralized heating thermal networks, and plant HVAC circulation pipelines. In environmental protection and sewage applications, they are used for process networks of small and medium-sized sewage treatment plants, industrial sewage discharge, and river water conveyance projects. In complex geological conditions, they are used for pipe network laying in soft soil foundations and settlement areas, relying on material toughness to adapt to foundation deformation.
Specifications
Ductile iron tee specifications cover DN25–DN2000, with pressure ratings suitable for PN10, PN16, PN25, and PN40. Connection methods include flange, socket, grooved, and mechanical joint (MJ), which can be combined and confirmed according to project requirements. The material is QT450-10 ductile iron, implemented in accordance with ISO2531, EN545, GB/T13295, and AWWA C110 standards. Surface anti-corrosion options include asphalt anti-corrosion, epoxy spray coating, hot-dip galvanizing, and zinc layer anti-corrosion; the specific solution must be confirmed in combination with the use environment. Non-standard pipe diameters, non-standard wall thicknesses, special branch angles, and eccentric diversion structures can be customized according to drawings or samples. If you need to confirm specific specification parameters or obtain selection advice, please contact us and provide the pipe diameter, pressure rating, connection method, and quantity.
Purchase & Delivery
For DN25–DN300 conventional grooved, flanged, and socket standard in-stock specifications, the MOQ is as low as 5 pieces, suitable for local pipe network renovation and project supplemental parts. For MOQs of other specifications and customized orders, please contact us for confirmation. For DN25–DN300 conventional in-stock styles, shipping preparation is completed within 24–48 hours after order confirmation; the delivery cycle for non-standard customization and bulk orders must be confirmed according to specifications and quantity. Packaging adopts a foreign trade-grade moisture-proof, collision-proof, and rust-proof solution: small pieces are equipped with plastic protective rings and anti-collision sleeves, small and medium specifications are coated with anti-rust coating and wrapped in waterproof oil paper and pearl cotton, medium and large diameter flange faces are equipped with protective backing plates, and extra-large diameters have reinforced anti-corrosion protection on the outer wall. Full-container shipments use fumigation-free solid wood pallets and high-strength steel strapping for reinforcement, and English shipping marks, specification parameters, project batches, and customer LOGO can be customized.
Service & Support
We provide pre-sales selection support and after-sales technical service for infrastructure engineering and foreign trade customers purchasing ductile iron tees. Before sales, we can assist in confirming working condition selection, material suitability, pressure rating matching, and anti-corrosion solution pairing to help reduce selection errors. Products undergo full appearance inspection, dimension re-measurement, material verification, and anti-corrosion layer testing before leaving the factory. For quality defects in factory casting, processing, or anti-corrosion, free returns and exchanges and free replacement are supported. After sales, we provide answers to questions on pipe network installation, anti-corrosion maintenance, and daily operation and maintenance, and assist overseas customers in tracking logistics and rapid customs clearance. The product warranty period is 18 months, with 7×24-hour after-sales response. If you need to learn about specific service terms, please contact us for confirmation.
FAQ
What is the difference between ductile iron tees and ordinary gray cast iron tees?
The core difference lies in material toughness. Ductile iron tees use QT450-10 material, with graphite distributed in a spherical form. Their crack resistance, settlement resistance, and rolling resistance are superior to ordinary gray cast iron tees. When buried, they are not prone to brittle fracture, making them suitable for municipal and infrastructure projects with high requirements for pipe network stability.
How should common pressure ratings be selected?
Ordinary water conservancy and municipal pipe networks usually select PN10 or PN16; heating pipe networks and heavy-load pipe networks in industrial areas can select PN25; high-pressure main pipe networks can select PN40 specifications. The specific selection needs to be confirmed in combination with design pressure, medium type, and laying conditions. You are welcome to contact us to provide working condition information so that we can assist with selection.
What scenarios are suitable for different connection methods?
Flange connections have strong sealing performance and can be disassembled for maintenance, making them suitable for permanent urban main pipe networks; socket connections have excellent anti-seepage performance, making them suitable for long-distance water conservancy water conveyance projects; grooved connections are weld-free and quick to install, and are explosion-proof and safe, making them suitable for rapid construction and renovation of building fire protection; mechanical joints (MJ) have relatively good seismic performance, making them suitable for areas with complex geology prone to settlement.
What are the minimum order quantity and delivery lead time?
For DN25–DN300 conventional grooved, flange, and socket standard in-stock specifications, the MOQ is as low as 5 pieces, and shipping preparation is completed within 24–48 hours after order confirmation. For other specifications, non-standard customization, and bulk orders, please contact us to confirm the minimum order quantity and delivery lead time.
Can non-standard sizes or special anti-corrosion be customized?
Yes. We support customization of any non-standard pipe diameter from DN25–DN2000, non-standard wall thickness, special branch angles, and eccentric flow-splitting structures. We can also provide thickened reinforcement, precision machining and shaping, and multiple anti-corrosion enhancement treatments, including epoxy food-grade anti-corrosion, heavy asphalt anti-corrosion, and hot-dip galvanized anti-corrosion. Please provide drawings, samples, or technical agreements, and we will assist in confirming the solution.
