Weld Neck Flanges are critical components in industrial piping systems, designed to handle high-pressure and high-temperature conditions. Their long tapered hub and smooth transition from flange to pipe wall ensure excellent stress distribution and structural strength. The butt-welded connection provides a secure, leak-proof joint, making them ideal for demanding applications. At Lianhe Valve (Wenzhou Lianhe Valve Fitting Co., Ltd.), we manufacture precision-engineered stainless steel weld neck flanges that meet international quality and performance standards.
Our Weld Neck Flanges are built for durability, reliability, and precision. Each forged flange offers superior integrity, capable of withstanding thermal expansion, vibration, and mechanical stress. Certified under ISO and CE standards, our products deliver excellent corrosion resistance and long service life, even in harsh environments.
High strength and leak resistance through precision butt-weld design
Excellent corrosion and temperature resistance for extended service
Reliable performance in oil, gas, and chemical processing systems
These advantages make Lianhe Valve a trusted partner for industries requiring high-performance forged flanges. For updates on product quality and insights, visit our Weld Neck Flanges news page.
We produce ASME B16.5 weld neck flanges in stainless steel, carbon steel, and alloy steel. Each flange is forged and machined using advanced technology to ensure dimensional accuracy and a smooth surface finish. Our products comply with international standards such as ASME B16.5, ASTM, DIN, and EN, ensuring compatibility and reliability worldwide.
| Material Type | Standard Compliance | Key Features |
|---|---|---|
| Stainless Steel | ASME B16.5 / ASTM A182 | Corrosion resistance, hygienic surface |
| Carbon Steel | DIN / EN | High strength, cost-effective |
| Alloy Steel | ASTM / ASME | Enhanced temperature and pressure resistance |
Every stainless steel weld neck flange undergoes strict inspection to ensure it meets both dimensional and mechanical specifications before shipment.
Understanding flange dimensions and pressure ratings is essential for proper selection. Lianhe Valve offers weld neck flanges in a wide range of sizes and pressure classes, from Class 150 to Class 2500. Selecting the correct dimension ensures secure alignment and optimal flow performance in complex piping systems.
| Pressure Class | Nominal Size Range | Typical Application |
|---|---|---|
| Class 150 | 1/2" – 24" | Low to medium pressure systems |
| Class 600 | 1/2" – 24" | Medium pressure pipelines |
| Class 1500 | 1/2" – 24" | High-pressure, high-temperature systems |
For detailed dimension charts or custom pressure class requirements, please contact Lianhe Valve.
Our Weld Neck Flanges are widely used in industries that demand strength and precision. They are suitable for oil and gas pipelines, chemical processing plants, water treatment facilities, and construction systems. Their robust design ensures reliable performance under extreme pressure and temperature conditions.
When combined with our stainless steel pipes and fittings, these flanges form complete, corrosion-resistant assemblies that maintain flow integrity and safety in critical operations.
Choosing the right Weld Neck Flange involves assessing material type, pressure rating, pipe size, and system compatibility. Following a proper selection guide helps ensure safety, performance, and compliance with international standards.
Select materials suitable for operating temperature and media
Match pressure ratings with system requirements
Ensure alignment with ASME or DIN dimensional standards
Consider corrosion resistance and maintenance needs
For specialized or large-scale projects, our technical team provides tailored advice and engineering support. Reach out through our Weld Neck Flanges contact page for assistance.
As a professional Weld Neck Flanges manufacturer and stainless steel flanges supplier, Lianhe Valve delivers consistent quality backed by over a decade of production experience. Our integrated R&D, manufacturing, and sales capabilities ensure efficient support from inquiry to delivery.
Certified under ISO, CE, and EAC standards
Compliance with ASME, ASTM, EN, and DIN specifications
Fast delivery from extensive stock
Global supply for oil, chemical, and construction sectors
Our commitment to quality and sustainability makes Lianhe Valve a trusted partner for industrial flange solutions worldwide.
Q1: What is the main advantage of a weld neck flange?
A: It provides a strong, leak-proof connection ideal for high-pressure and high-temperature systems.
Q2: Which materials are available for Lianhe Valve’s weld neck flanges?
A: We offer stainless steel, carbon steel, and alloy steel options to meet diverse industrial needs.
Q3: Are your flanges compliant with international standards?
A: Yes. All products conform to ASME B16.5, ASTM, DIN, and EN standards for global compatibility.
Q4: Can I request custom sizes or pressure ratings?
A: Absolutely. We provide custom manufacturing to meet specific project requirements.
Q5: In which industries are weld neck flanges commonly used?
A: They are widely applied in oil and gas, chemical processing, water treatment, and construction sectors.
For more information or to request a quote, contact our professional Weld Neck Flanges supplier team at Lianhe Valve through the Contact Us page.
