DIN 2632 PN10 Weld Neck Flanges Order

On February 11, 2025, we received an inquiry from a long-standing Shanghai client regarding DIN 2632 PN10 weld neck flanges. We promptly responded to the client. Given our established partnership spanning many years, the client placed the order that very same day.

Information of Order：

Material Standard ：SMO 254

Size ：DN 50

Pressure：PN 10

Production Standard ：DIN 2632

Sealing Surface Type ：Raised Face

Upon receiving the order, our sales team confirmed the order details according to our service procedures and promptly initiated the procurement and production processes.During production, we implemented a comprehensive precision control system, strictly adhering to DIN 2632 standards. Multiple quality inspection procedures ensured product quality.

Structural Design of Weld Neck Flanges:

Weld neck flanges are widely used in high-pressure piping systems due to their excellent structural strength and stress distribution capabilities. The design features a tapered hub that provides smooth transition from flange thickness to pipe wall thickness, significantly reducing stress concentration. The long neck section helps dissipate forces away from the welded joint, making it ideal for applications involving temperature fluctuations, high pressures, or cyclic loading conditions. These flanges are typically forged for enhanced mechanical properties and are machined with precise mating surfaces to ensure leak-proof connections under demanding operational environments.

Introduction to DIN 2632 Standard:

DIN 2632 is the German standard for weld neck flanges with a nominal pressure of PN 10, falling under the EN 1092-1 series of flange standards. PN 10 indicates a nominal pressure of 10 bar (1.0 MPa), making it suitable for medium-to-low pressure piping systems. This standard specifies precise requirements for flange structural dimensions, bolt hole count, bolt hole diameter, and sealing face configuration, ensuring interchangeability and standardization for international projects.

SMO 254 Material Specification：

SMO 254 (UNS S31254) is a low-carbon, high-molybdenum super austenitic stainless steel renowned for its exceptional corrosion resistance, particularly suited for extreme environments containing chloride ions and other oxidizing media.

Chemical Composition:

Element	C	Mn	Si	P	S	Cr	Ni	Mo	N	Cu
Content Range	≤0.020	≤1.00	≤0.80	≤0.030	≤0.010	19.5–20.5	17.5–18.5	6.0–6.5	0.18–0.22	0.5–1.0

Mechanical Properties:

Property	T.S (MPA)	Y.S (MPA)	EL %	Hardness
Value	≥ 650 MPa	≥ 300 MPa	≥ 35%	≤ 270

DIN 2632 PN 10 Critical Dimensions：

Nominal Diameter  (mm)	Outer Diameter  (mm)	Bolt Hole Center Circle Diameter (mm)	Number of Bolt Holes	Bolt Hole Diameter (mm)	Flange Thickness (mm)	Neck Outer Diameter (mm)
50	165	125	4	18	18	57

This dimensional data is derived from the DIN 2632 PN 10 standard table, ensuring universal applicability in international projects.

Advantages of SMO 254 Weld Neck Flanges:

✅Exceptional Corrosion Resistance: Demonstrates significantly superior corrosion resistance compared to 316L and Duplex grades in chlorine-containing environments and acidic media.

✅High Strength: Superior mechanical strength over conventional stainless steel, maintaining stability under medium to high pressures.

✅High-Temperature Resistance: Maintains excellent performance in environments below 600°C.

✅Extended Service Life: Significantly reduces maintenance and replacement frequency in demanding conditions.

✅Excellent Compatibility: Complies with DIN standards, facilitating seamless integration with international piping systems.

DIN 2632 PN10 weld neck flanges Application :

• Seawater Desalination: Suitable for high chloride ion environments with outstanding corrosion resistance.
• Chemical and Petrochemical Industries: Capable of transporting strong acids and alkalis.
• Offshore Engineering: Widely used in offshore platforms and marine vessel piping systems.
• Energy Sector: Employed in power plant cooling systems and high-temperature heat exchange equipment.
• Pulp and Paper Manufacturing: Delivers exceptional performance in chlorine-based bleaching processes.

Conclusion:

DIN 2632 PN10 weld neck flanges combine the precision of the DIN 2632 standard with the superior properties of SMO 254 material, providing customers with a reliable, durable, and highly secure flange solution. Their exceptional corrosion resistance and mechanical strength make them an ideal choice for marine engineering, chemical, and energy industries.