Flange

Common Materials

Carbon steel flanges (Q235, 20#)

Low cost and high strength; suitable for water supply and drainage, fire protection, and general industrial piping. Available in two types: forged and cast. Forged flanges offer higher density and are less prone to leakage.

Stainless steel flange (304/316L)

Rust‑proof and corrosion‑resistant, resistant to acids and alkalis, and highly resistant to salt spray; suitable for wastewater treatment plants, the chemical industry, coastal pipeline networks, and food‑grade piping.

Ductile iron flange

It boasts excellent toughness, with strong seismic and compressive resistance, and is commonly used as a complementary component for large-diameter cast-iron water supply and drainage pipelines in municipal infrastructure.

Product Advantages

Easy to disassemble and assemble, facilitating maintenance.

The piping can be disconnected simply by loosening the flange bolts, eliminating the need to cut the pipeline and saving time and effort during equipment maintenance and valve replacement.

Sealed and stable, leak-proof.

When used with rubber gaskets and PTFE washers, it achieves a tight seal under compression, ensuring no leakage of water, gas, or oil.

Strong load-bearing capacity and long service life.

The forged flange is integrally formed, offering excellent resistance to impact and water pressure, and remaining resistant to cracking and deformation under high‑temperature, high‑pressure operating conditions.

Wide compatibility

Available in multiple specifications, pressure ratings, and material options; compatible with steel pipes, stainless steel pipes, cast iron pipes, and PE pipes.

Standardized and universal, easy to replace.

Standardized dimensions ensure interchangeability among products of the same specification from different manufacturers, simplifying procurement and inventory management.

Applicable Scenarios

Municipal engineering: urban water supply and drainage networks, stormwater and sewage pumping stations, and gas transmission pipelines.

Fire Protection Engineering: Fire piping and fire pump connections for plant areas and buildings;

Industrial plant area: circulating water systems, steam pipelines, chemically resistant piping, and wastewater treatment equipment.

Building utilities: central air-conditioning and ventilation ductwork, data-center pumps, and pressure vessel connections.

Oil and gas energy: fuel and gas transmission, as well as high-temperature, high-pressure pipelines in thermal power plants.