Practical Uses of 304 20592PL Flange DN25*PN6 in Modern Pipeline Networks

The Role of Plate Welding Flange in Pipeline Engineering

Within the field of pipeline connection technology, the Plate Welding Flange stands out for its simplicity, strength, and cost-effectiveness.
The model 304 20592PL Flange DN25*PN6, produced according to HG/T 20592 standards, corresponds with ISO 7005 and EN 1092 systems, ensuring full dimensional compatibility.

As a China-based flange manufacturer and bulk exporter, we maintain strict quality control and steady production to provide large-volume supply for global pipeline projects.
The DN25 PN6 flange—crafted from AISI 304 stainless steel—is specifically designed for low-pressure applications where anti-corrosion performance and long-term reliability are critical.

1. Material Advantage: Why Choose 304 Stainless Steel

The selection of 304 stainless steel for this flange is no coincidence. This grade provides excellent resistance to oxidation, good weldability, and high mechanical strength under moderate temperatures.
It’s ideal for environments exposed to moisture or mild acids, which are common in chemical plants, food industries, and water-processing facilities.

For systems operating at PN6 pressure class, this material offers more than enough endurance while keeping the cost manageable. It represents an optimal balance between performance, price, and durability, making it a favorite among pipeline engineers.

2. Structure and Working Principle of the 20592PL Flange

The “PL” in 20592PL Flange refers to its plate-type structure—a flat ring welded directly to the pipe’s end. Compared to slip-on or socket flanges, plate welding flanges provide stronger weld joints and allow easy alignment during assembly.

For DN25 pipelines (roughly 1 inch), this type of flange is commonly used for small-diameter process lines or connection points to valves, pumps, and filters.

Main Benefits of Plate Welding Flange:

·Simple to install and maintain, minimizing downtime.

·Distributes welding stress evenly along the joint.

·Economical for low-pressure systems.

·Available in custom thickness and surface finishes.

Being a professional China flange supplier, we operate advanced CNC machining centers and automated inspection systems, enabling consistent precision and large-batch production for global customers.

3. Typical Applications of 304 20592PL Flange DN25*PN6

This flange model is a versatile connector widely applied across multiple industries:

a. Chemical & Petrochemical Systems

In low-pressure chemical transfer lines, these flanges connect storage tanks, valves, and control units. The stainless steel prevents corrosion and ensures system safety under varying fluid conditions.

b. Water & Sewage Treatment Plants

For treated water and industrial wastewater pipelines, the DN25 PN6 Plate Welding Flange offers secure, leak-proof joints and resists oxidation from chlorinated water.

c. Food & Beverage Manufacturing

Due to its sanitary nature, 304 stainless steel is a preferred choice for piping in milk, beverage, and brewery systems where hygiene is essential. Its smooth surface supports easy cleaning and sterilization.

d. Marine and Offshore Installations

In marine engineering, corrosion resistance is vital. The 304 flange provides long-term performance in salt-rich atmospheres, making it suitable for ship pipelines and coastal plants.

e. HVAC & Utility Applications

The 20592PL flange connects auxiliary lines in heating and cooling systems, offering safe, stable, and durable performance under moderate pressure.

4. Dimensional Standards and Interchangeability

The HG/T 20592 design standard aligns with ISO 7005-1 and EN 1092-1, which means the 304 20592PL DN25 PN6 flange is dimensionally compatible with international fittings.

For reference, its typical measurements include:

·Outside diameter: 115 mm

·Bolt circle diameter: 85 mm

·Thickness: 14 mm

·Bolt holes: 4 × M12

Such precision ensures easy interchangeability during system maintenance or upgrades, reducing downtime and improving pipeline reliability.

5. Maintenance, Longevity, and Replacement

The combination of 304 stainless steel and welded structure makes this flange nearly maintenance-free. Routine checks focus mainly on gasket sealing surfaces and weld integrity.
With proper installation torque and gasket selection (PTFE or non-asbestos types), service life can exceed two decades in typical environments.

For more corrosive or marine conditions, engineers may upgrade to 316L stainless steel, which offers additional molybdenum content for enhanced protection.

Conclusion: Dependable China Supplier for 304 20592PL Plate Welding Flanges

The 304 20592PL Flange DN25*PN6 remains one of the most dependable solutions for pipeline systems worldwide. From chemical plants to water treatment and food processing, it delivers exceptional corrosion resistance, mechanical integrity, and compatibility with international standards.

As a leading China manufacturer and bulk supplier of Plate Welding Flanges, we ensure mass production capacity, consistent quality control, and on-time global delivery. Whether for new installations or replacement projects, our stainless steel flanges guarantee both value and reliability.

References

GB/T 7714:Jaszak P, Skrzypacz J, Borawski A, et al. Methodology of leakage prediction in gasketed flange joints at pipeline deformations[J]. Materials, 2022, 15(12): 4354.

MLA:Jaszak, Przemysław, et al. "Methodology of leakage prediction in gasketed flange joints at pipeline deformations." Materials 15.12 (2022): 4354.

APA:Jaszak, P., Skrzypacz, J., Borawski, A., & Grzejda, R. (2022). Methodology of leakage prediction in gasketed flange joints at pipeline deformations. Materials, 15(12), 4354.