DIN PN6 - PN40 Weld Neck Flange Manufacturer

DIN PN6 - PN40 Weld Neck Flanges

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DIN PN6 – PN40 Weld Neck Flanges are designed to be extremely strong and reliable in high-pressure pipe systems. Werner Flanges Inc. specializes in manufacturing and supplying these flanges with accuracy to fulfill strict industrial standards. Our DIN Weld Neck Flanges are engineered to provide a secure connection by effortlessly welding to pipes, reducing stress concentrations, and offering greater fatigue and corrosion resistance. These flanges, available in pressure ratings ranging from PN6 to PN40, are suited for demanding applications in sectors such as oil and gas, petrochemicals, water treatment, and power generation.

Werner Flanges Inc. assures high-quality DIN PN6 – PN40 Weld Neck Flanges that are specifically fitted to your project needs. Whether you want conventional sizes or unique solutions in exotic metals, our staff is ready to assist. For dependable supply and reasonable price, contact sales@wernerflanges.com immediately. Werner Flanges Inc.—your trusted partner for DIN Weld Neck Flanges—offers the ideal combination of durability, accuracy, and service.

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DIN PN6 - PN40 Plate Flanges Technical Specifications

Specification	Details
Standards	DIN EN 1092-1 (formerly DIN 2633, DIN 2634, DIN 2635, DIN 2636)
Pressure Ratings (PN)	PN6, PN10, PN16, PN25, PN40
Flange Type	Weld Neck Flanges (Long and Short Weld Neck)
Size Range	DN 10 to DN 600 (or as per customer requirement)
Face Types	Raised Face (RF), Flat Face (FF), Tongue and Groove (T&G)
Connection	Butt weld to pipe
Dimensions	According to DIN EN 1092-1 specifications
Testing	Hydrostatic test, Radiographic test, Dimensional inspection
Surface Finish	Machined with high precision for a smooth sealing surface

Material Specifications for DIN PN6 - PN40 Weld Neck Flanges

Type of Materials	Common Specifications / Customization Available on Request * Materials conform to ASTM/ASME standards and are compatible with DIN PN6 – PN40 Weld Neck Flanges
Duplex Steel	ASTM/ASME A182 F51, F60, F61, UNS S31803, UNS S32205
Super Duplex Steel	ASTM/ASME A182 F53, F55, UNS S32750, UNS S32760, F44 (6Mo)
Stainless Steel	ASTM/ASME A182 F304, F304L, F316, F316L, F310, F317L, F321, F347, F904L, etc.
Carbon Steel	ASTM A105, A350 LF1, LF2, LF3, A266 Class 1/2, A694 F42 to F70, A765 Gr. II
Alloy Steel	ASTM/ASME A182 F1, F5, F9, F11, F12, F22
Non-Ferrous Alloys	Titanium, Brass, Admiralty Brass, Copper Nickel, Nickel Alloys, Hastelloy
Titanium	ASTM/ASME B381 Gr.1, Gr.2, Gr.5, Gr.7, Gr.12, Gr.16
Copper Nickel	ASTM B151 UNS C70600 (Cu-Ni 90/10), C71500 (Cu-Ni 70/30)
Brass, Al-Brass	ASTM B152 UNS C26000, C27200, C28000; ASTM B111 for Al-Brass
Nickel Alloys	ASTM B160, B161, B564 – UNS N02200, N02201, N04400, N08800, N08825, N06600, N06601, N06625, Monel K500
Alloy 20	ASTM B462 UNS N08020
Hastelloy	ASTM B564 UNS N10276 (Hastelloy C276), N06022 (Hastelloy C22)
Cladded Materials	ASTM B898, B265, B424 or custom explosion/clad bonding using dissimilar metals
Cladded Materials	Titanium-Steel, Nickel-Steel, Titanium-Copper, Stainless Steel-Carbon Steel, Bimetallic/Trimetallic Combinations

Understanding Pressure Ratings in DIN Weld Neck Flanges:

DIN Weld Neck Flanges are classified by pressure ratings denoted as PN (Pressure Nominal), such as PN6, PN10, PN16, PN25, and PN40, which indicate the maximum pressure the flange can handle in bar at a reference temperature, typically ambient. These ratings help determine the suitability of the flange for various applications, from low-pressure systems like water pipelines (PN6, PN10) to high-pressure industrial setups such as oil, gas, and petrochemical plants (PN25, PN40). For instance, a PN40 flange is designed for systems operating at higher pressures (up to 40 bar). The pressure rating is influenced by factors like material grade, temperature range, and the nature of the fluid being transported. Weld neck flanges, with their long tapered hub and butt-welded connection, are especially preferred for high-pressure and high-temperature conditions, as they ensure reduced stress concentration and improved strength at the joint.

Factors to Consider When Selecting DIN Weld Neck Flange Pressure Ratings:

Operating Pressure: Ensure the selected PN rating matches or exceeds the maximum system pressure.
Operating Temperature: Higher temperatures can reduce the pressure tolerance of the flange material.
Material Compatibility: Choose materials that are compatible with the fluid or gas to prevent corrosion or degradation.
Application Environment: Consider environmental factors like external pressure, vibration, and potential mechanical stress.
Fluid Characteristics: Take into account the fluid’s abrasiveness, corrosiveness, and whether it is gas or liquid.
Compliance & Standards: Verify that the flange complies with DIN standards and relevant certifications (e.g., EN 10204, NACE).
Pipe Size & Wall Thickness: Ensure the flange matches the pipe dimensions for a proper weld and seal.
Future Scalability: If the system might be upgraded, consider choosing a higher PN rating for flexibility.

Advantages of Using Properly Rated DIN Weld Neck Flanges:

Enhanced Safety: Proper pressure rating ensures safe operation under expected system conditions, reducing the risk of leaks or failures.
Longer Service Life: Correctly rated flanges resist fatigue and pressure-related stress, extending operational lifespan.
Improved Sealing: Weld neck design with accurate rating offers superior sealing, especially under high pressure and temperature fluctuations.
System Efficiency: Helps maintain system integrity and performance without frequent shutdowns or maintenance.
Regulatory Compliance: Ensures the flange system adheres to industry standards and safety norms.
Reduced Maintenance Costs: Minimizes downtime and replacement needs due to pressure failures or mismatched ratings.
Versatility: Suitable for a wide range of industries including oil & gas, power generation, and chemical processing.

Types of DIN PN6 - PN40 Weld Neck Flanges

Type	Description
DIN 2631 PN6 Weld Neck Flanges	Designed for low-pressure applications, these flanges are used in systems like water pipelines, HVAC, and light industrial service lines.
DIN 2632 PN10 Weld Neck Flanges	Ideal for moderate pressure environments, suitable for compressed air lines, utility piping, and non-critical flow systems.
DIN 2633 PN16 Weld Neck Flanges	Most commonly used for water, gas, and steam applications in chemical, marine, and general industrial sectors.
DIN 2634 PN25 Weld Neck Flanges	Engineered for higher pressure systems, these flanges are reliable in oil refineries, steam lines, and high-temperature processes.
DIN 2635 PN40 Weld Neck Flanges	Built to withstand very high pressures, ideal for critical operations in petrochemical, power generation, and offshore industries.

DIN PN6 - PN40 Weld Neck Flanges: Dimensions & Pressure Ratings

Nominal Size (BSP)	Pressure Rating (PN)					Details
DN / Inch	PN6	PN10	PN16	PN25	PN40
DN 6 / 1/8″	90 mm	95 mm	95 mm	95 mm	95 mm	O.D.
	65 mm	65 mm	65 mm	65 mm	65 mm	PCD
	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	Holes x diameter
DN 10 / 1/4″	100 mm	105 mm	105 mm	105 mm	105 mm	O.D.
	75 mm	75 mm	75 mm	75 mm	75 mm	PCD
	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	Holes x diameter
DN 15 / 1/2″	110 mm	115 mm	115 mm	115 mm	115 mm	O.D.
	85 mm	85 mm	85 mm	85 mm	85 mm	PCD
	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	Holes x diameter
DN 20 / 3/4″	125 mm	135 mm	135 mm	135 mm	135 mm	O.D.
	100 mm	100 mm	100 mm	100 mm	100 mm	PCD
	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	Holes x diameter
DN 25 / 1″	140 mm	150 mm	150 mm	150 mm	150 mm	O.D.
	115 mm	115 mm	115 mm	115 mm	115 mm	PCD
	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	Holes x diameter
DN 32 / 1 1/4″	150 mm	165 mm	165 mm	165 mm	165 mm	O.D.
	130 mm	130 mm	130 mm	130 mm	130 mm	PCD
	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	Holes x diameter
DN 40 / 1 1/2″	160 mm	180 mm	180 mm	180 mm	180 mm	O.D.
	145 mm	145 mm	145 mm	145 mm	145 mm	PCD
	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	Holes x diameter
DN 50 / 2″	175 mm	195 mm	195 mm	195 mm	195 mm	O.D.
	160 mm	160 mm	160 mm	160 mm	160 mm	PCD
	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	4 x 14 mm	Holes x diameter
DN 65 / 2 1/2″	185 mm	205 mm	205 mm	205 mm	205 mm	O.D.
	180 mm	180 mm	180 mm	180 mm	180 mm	PCD
	8 x 18 mm	8 x 18 mm	8 x 18 mm	8 x 18 mm	8 x 18 mm	Holes x diameter
DN 80 / 3″	195 mm	215 mm	215 mm	215 mm	215 mm	O.D.
	160 mm	175 mm	175 mm	175 mm	175 mm	PCD
	8 x 18 mm	8 x 18 mm	8 x 18 mm	8 x 18 mm	8 x 18 mm	Holes x diameter
DN 100 / 4″	220 mm	240 mm	240 mm	240 mm	240 mm	O.D.
	180 mm	195 mm	195 mm	195 mm	195 mm	PCD
	8 x 18 mm	8 x 18 mm	8 x 18 mm	8 x 18 mm	8 x 18 mm	Holes x diameter
DN 125 / 5″	250 mm	280 mm	280 mm	280 mm	280 mm	O.D.
	210 mm	225 mm	225 mm	225 mm	225 mm	PCD
	8 x 18 mm	8 x 22 mm	8 x 22 mm	8 x 22 mm	8 x 22 mm	Holes x diameter
DN 150 / 6″	285 mm	310 mm	310 mm	310 mm	310 mm	O.D.
	240 mm	260 mm	260 mm	260 mm	260 mm	PCD
	8 x 18 mm	8 x 22 mm	8 x 22 mm	8 x 22 mm	8 x 22 mm	Holes x diameter

Industries and Applications of DIN PN6 - PN40 Weld Neck Flanges:

DIN PN6 to PN40 Weld Neck Flanges are widely used across a range of industries due to their strength, durability, and suitability for high-pressure applications. These flanges provide reliable, leak-proof connections for pipes, valves, pumps, and other critical equipment in demanding environments.

Oil & Gas Industry: Used extensively in upstream, midstream, and downstream processes for the secure transport of crude oil, natural gas, and refined products.
Chemical & Petrochemical Plants: Vital for handling corrosive fluids and high-temperature processes in chemical manufacturing and refining.
Power Generation: Commonly applied in thermal, nuclear, and hydroelectric power plants for steam, cooling, and pressure piping systems.
Water Treatment & Distribution: Utilized in municipal water supply, wastewater treatment, and irrigation systems to ensure safe and efficient fluid transfer.
Pharmaceutical & Food Processing: Suitable for sanitary piping systems requiring high cleanliness and corrosion resistance.
Marine & Shipbuilding: Used in ballast, bilge, fuel, and cooling water systems where mechanical strength and corrosion resistance are crucial.
HVAC & Fire Protection Systems: Employed in heating, ventilation, air conditioning, and fire sprinkler pipelines to maintain system integrity under pressure.

Frequently Asked Questions (FAQs) about DIN PN6 - PN40 Weld Neck Flanges

1. What are DIN PN6 – PN40 Weld Neck Flanges?: DIN PN6 to PN40 Weld Neck Flanges are flanges manufactured according to DIN standards, designed for welding to pipe ends, suitable for pressure ratings ranging from 6 to 40 bar, offering high strength and durability.
2. What industries commonly use DIN PN6 – PN40 Weld Neck Flanges?: These flanges are commonly used in oil & gas, petrochemical, power generation, water treatment, marine, pharmaceutical, and HVAC industries.
3. What materials are typically used for these flanges?: Common materials include carbon steel, stainless steel, alloy steel, and special alloys designed to withstand specific operating conditions like corrosion and high temperatures.
4. How do I select the appropriate PN rating for my application?: Select a flange with a PN rating that matches or exceeds your system’s operating pressure and temperature to ensure safety and reliability.
5. What are the advantages of weld neck flanges?: Weld neck flanges provide superior strength, reduced stress concentration due to their tapered hub design, and excellent resistance to bending and fatigue in high-pressure environments.
6. Can DIN PN flanges be interchanged with ANSI flanges?: No, DIN PN and ANSI flanges have different dimensions and bolt patterns and are generally not interchangeable without adapters.
7. How does flange thickness vary with PN rating?: Flange thickness generally increases with higher PN ratings to withstand greater pressure levels.
8. Which standards govern DIN PN6 – PN40 Weld Neck Flanges?: DIN EN 1092-1 is the primary standard for flange dimensions and pressure classes, with material standards defined separately depending on composition.
9. Are custom sizes and materials available?: Yes, manufacturers often provide customization options for flange sizes, materials, and drilling patterns to meet specific project requirements.
10. Where can I purchase high-quality DIN PN6 – PN40 Weld Neck Flanges?: Contact trusted suppliers or manufacturers like Werner Flanges Inc. at sales@wernerflanges.com for inquiries and custom orders.