Guide to 304 20592PL Flange DN20*PN6 Specifications

Pipeline networks rely on components that can guarantee both strength and sealing integrity. Among the many flange types, the Plate Welding Flange is one of the simplest yet most effective. The 304 20592PL Flange DN20*PN6 in particular is a standard choice for low-pressure applications, offering excellent performance thanks to its stainless steel build and compliance with recognized engineering norms.

For large projects requiring bulk supply directly from Chinese manufacturers, this flange presents a practical and cost-efficient solution. In this guide, we will break down its specifications, material properties, main advantages, and areas of use.

Breaking Down the 304 20592PL Flange DN20*PN6

Each part of this designation provides useful information:

304 Stainless Steel – A versatile material with corrosion resistance and durability.

20592PL – Refers to the standardized type, with PL indicating a Plate Welding Flange.

DN20 – Denotes a nominal bore size of 20 mm, common in small pipelines.

PN6 – A pressure class that allows up to 6 bar, intended for low-pressure systems.

This configuration results in a flat circular flange that is welded directly onto pipe ends, secured with bolts for reliable assembly.

Key Benefits of Plate Welding Flanges

The Plate Welding Flange has proven advantages, including:

Straightforward installation with minimal alignment difficulties.

Flat sealing surface that supports gasket placement and prevents leaks.

Affordable design compared to heavier-duty flanges.

Interchangeability across different projects due to international standards.

Scalability when ordered in batch supply from China-based manufacturers.

These qualities explain why this type of flange is consistently chosen for industrial and municipal piping.

Material Strength: Why Stainless Steel 304?

Choosing 304 stainless steel for the 20592PL flange enhances its performance:

Resistance to corrosion from water and mild chemicals.

High durability, reducing replacement frequency.

Ease of welding, ensuring strong joints during fabrication.

Hygienic properties, making it suitable for potable water and food systems.

The material ensures the 304 20592PL Flange DN20*PN6 delivers dependable results even in demanding conditions.

Technical Parameters

Nominal Diameter: DN20 (20 mm)

Pressure Rating: PN6 (6 bar)

Flange Type: Plate Welding Flange (PL)

Material: Stainless Steel 304

Sealing Face: Flat face for gasket use

Bolt Holes: Drilled per PN6 dimensional standards

Because these specifications follow international norms, the flange is compatible with a wide range of pipeline setups.

Main Areas of Application

This flange type is widely adopted across multiple fields:

Public Water Distribution – Prevents contamination and ensures safe transport.

Gas Pipelines – Suitable for low-pressure systems.

Heating and Cooling Networks (HVAC) – Provides dependable sealing.

Industrial Installations – Used to connect pumps, valves, and pipeline sections.

Light Chemical Processing – Tolerates mildly corrosive environments.

Its adaptability makes the Plate Welding Flange a go-to choice for engineers.

Sourcing from Chinese Manufacturers

When considering large-scale projects, partnering with a Chinese manufacturer for bulk supply offers several advantages:

Consistent quality control following EN and DIN standards.

Large production capacity to meet project timelines.

Competitive pricing without sacrificing reliability.

Flexibility with different pressure classes and diameters available.

This ensures buyers not only get the right specifications but also benefit from efficiency and affordability.

Installation Recommendations

To ensure the best performance from the 304 20592PL Flange DN20*PN6:

Prepare pipe ends carefully before welding.

Use correct welding methods to avoid weak points.

Select matching gaskets according to pipeline media.

Tighten bolts evenly in sequence to achieve proper sealing.

Inspect the final joint for alignment and weld integrity.

Following these practices ensures the flange performs reliably throughout its service life.

Conclusion

The 304 20592PL Flange DN20*PN6 demonstrates the strengths of the Plate Welding Flange design: simplicity, reliability, and cost efficiency. Built from stainless steel 304 and compliant with PN6 specifications, it remains a dependable solution for low-pressure systems in water, gas, HVAC, and light chemical industries.

For projects requiring bulk supply from trusted Chinese manufacturers, this flange provides the right balance of affordability, durability, and availability. In modern pipeline systems, the Plate Welding Flange continues to be a cornerstone component that delivers lasting value.

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.