Reducing tee

Product Overview

A reducing tee is a T‑shaped fitting in which the main branch has a larger diameter and the branch outlets have smaller diameters, used to connect pipes of different sizes while enabling flow diversion or merging.
It enables seamless diameter transitions without cutting the main pipe, making it a core component for building flexible, scalable piping systems. The product is widely used in the oil and gas, chemical, power generation, and water supply industries, delivering stable and reliable performance across a broad range of pressure and temperature conditions.

Key Features

Flexible specifications: Both main and branch pipe diameters can be customized; seamless sizes range from DN15 to DN1200, while welded sizes span DN200 to DN2000; wall thicknesses cover SCH10 up to a maximum custom thickness of 150 mm.
High‑strength forming: Processed using hot pressing, cold extrusion, and hydraulic expansion techniques, resulting in uniform wall thickness and significantly enhanced structural strength at all connection points.
A wide range of materials is available: carbon steel, stainless steels 304/316, alloy steels, low‑temperature steels, and nickel‑based alloys. Additionally, sulfur‑resistant materials compliant with NACE MR-0175 are offered to suit corrosive service conditions.
Full compliance with standards: Manufactured in accordance with international standards such as ASME B16.9, GB/T 12459, and DIN 2615, ensuring high interchangeability and consistent performance across all applications.
Customized Solutions: We can tailor corrosion‑protective coatings—such as anti-corrosion paint, 3LPE coating, and hot‑dip galvanizing—and various connection methods to meet specific application requirements.

Production process

Our factory manufactures reducing tees using advanced forming processes:
Hydraulic branch expansion: A dedicated hydraulic device is integrally formed, suitable for standard‑wall‑thickness tees up to DN400, offering high production efficiency and consistent, stable product quality.
Hot‑press forming: Used for large‑diameter, thick‑walled tees to ensure uniform microstructure and reliable performance under high‑temperature, high‑pressure service conditions.

All products undergo rigorous quality control, including chemical composition analysis, mechanical property testing, and nondestructive testing methods such as ultrasonic and radiographic inspection, to meet industry standards.

Application areas

Oil and gas industry: refineries, natural gas transmission pipelines, and petrochemical plants, used for connecting main lines to smaller distribution branches.
Power generation industry: power plant steam distribution pipelines, cooling water systems, and fuel transport pipelines.
Water supply system: Main and branch pipe diameter transitions for municipal networks, industrial water treatment, and fire‑fighting pipelines.
Chemical plant: process piping for reactors, heat exchangers, and storage tanks.
Maritime and marine industries: scenarios such as offshore platforms and shipbuilding that require high-strength, corrosion-resistant piping components.

Quality Assurance and Customized Services

Our factory is equipped with a complete set of state-of-the-art production and testing equipment, and all our products comply with industry‑standard and internationally recognized specifications.
We also offer comprehensive customization services, allowing you to tailor pressure ratings, dimensional specifications, anti-corrosion coatings, and connection types to meet your project’s specific requirements.