How to Select 304 20592PL Flange DN20*PN6 for Pipelines

How to Select 304 20592PL Flange DN20*PN6 for Pipelines

In the construction of fluid transport systems, the flange connection is a critical component. Among different flange standards, the 304 20592PL Flange DN20*PN6 is widely adopted for its stable performance, corrosion resistance, and compliance with industrial norms. Belonging to the Plate Welding Flange category, this product is particularly suitable for low-pressure pipelines such as water supply, HVAC, and light chemical lines.

When selecting such components, buyers and engineers not only need to consider technical requirements but also the stability of the supply chain. That’s why sourcing from a China manufacturer with bulk supply capabilities is often the preferred option for distributors and project contractors.

What is 304 20592PL Flange DN20*PN6?

·304 Stainless Steel: The flange is made from grade 304 stainless steel, ensuring resistance to oxidation, moisture, and mild chemicals.

·20592PL Standard: Refers to GB/T 20592 Plate Welding Flange, which defines structural dimensions and manufacturing tolerances.

·DN20: Nominal diameter of 20 mm, mainly used in small-scale pipelines.

·PN6: Pressure rating of 6 bar, appropriate for light-duty applications where moderate pressure handling is sufficient.

This combination balances cost and performance, making it a practical solution for many pipeline systems.

Advantages of Plate Welding Flange

1.Reliable Welding Connection
Plate Welding Flanges are welded to the pipe ends, ensuring structural integrity and reliable sealing.

2.Simple and Practical Design
Compared with other flange types, the flat plate structure is easier to produce, install, and maintain.

3.Economic Benefits
The cost is generally lower, which is especially useful for large projects with multiple pipeline connections.

4.Wide Range of Applications
Commonly applied in water treatment, air conditioning systems, food production lines, and other low to medium pressure pipelines.

Key Considerations in Selection

1.Material Certification
Confirm the flange is manufactured from certified 304 stainless steel. Substandard alloys reduce service life and resistance to corrosion.

2.Dimensional Compliance
Ensure the product adheres strictly to GB/T 20592 specifications so that it matches standard pipes and gaskets.

3.Pressure Suitability
PN6 is adequate for low-pressure uses. For higher requirements, select higher-rated versions of Plate Welding Flanges.

4.Surface Finish and Flatness
The sealing surface should be smooth and uniform, minimizing risks of leakage.

5.Supplier Reliability
A China factory with bulk supply capacity can guarantee quality consistency, timely shipment, and favorable pricing.

Benefits of Bulk Supply from China Manufacturer

·Strict Quality Management: Factories producing in large quantities usually follow GB/T standards.

·Lower Cost: Direct cooperation with manufacturers avoids extra layers of cost.

·Order Flexibility: Bulk suppliers often provide options for customized size, thickness, or surface treatment.

·Supply Security: Large-scale manufacturing capacity supports steady and long-term procurement needs.

By sourcing directly from a Chinese supplier, distributors and contractors gain advantages in both economics and reliability.

Practical Applications

·Municipal Water Systems: Resistant to rust and suitable for continuous operation.

·Heating and Cooling Pipelines: Compatible with HVAC installations.

·Food & Beverage Processing: Stainless steel’s hygiene properties make it ideal for clean environments.

·Light Chemical Lines: Provides protection against weak acids and alkalis.

Conclusion

The 304 20592PL Flange DN20*PN6 stands out as a cost-effective and reliable option for small-diameter, low-pressure pipelines. As a type of Plate Welding Flange, it combines ease of installation with long-term durability.

When selecting a flange, focus on certified material, accurate dimensions, and appropriate pressure ratings. Partnering with a China manufacturer offering bulk supply ensures continuous product availability, cost savings, and quality assurance.

Choosing the right flange is not only a technical decision but also a strategic sourcing choice that directly affects the stability of your pipeline project.

References

GB/T 7714:Yu Y, Wang X, Wei S, et al. Corrosion Behavior and Mechanism of 304 Stainless Steel Welded Joints in Simulated Freshwater Environment[J]. Materials, 2025, 18(13): 3074.

MLA:Yu, Yue, et al. "Corrosion Behavior and Mechanism of 304 Stainless Steel Welded Joints in Simulated Freshwater Environment." Materials 18.13 (2025): 3074.

APA:Yu, Y., Wang, X., Wei, S., Chen, Z., Wang, Z., Li, M., & Liu, Z. (2025). Corrosion Behavior and Mechanism of 304 Stainless Steel Welded Joints in Simulated Freshwater Environment. Materials, 18(13), 3074.