Long Weld Neck Flange - Forged Steel LWN Flanges 304/316L
Our Long Weld Neck Flanges (LWN) represent the pinnacle of forged flange technology, designed specifically for critical applications requiring superior performance under extreme conditions. Manufactured from premium stainless steel grades 304 and 316L, these flanges provide exceptional corrosion resistance and mechanical strength. The extended neck design ensures optimal stress distribution, making them ideal for high-pressure systems, process piping, and severe service applications where reliability is paramount.
Design Features & Benefits
Extended Neck Length: Provides superior stress distribution and reduces pipe stress concentration
Precision Forging: Ensures uniform grain structure and enhanced mechanical properties
Smooth Bore: Minimizes turbulence and pressure drop in fluid systems
Optimized Hub Taper: Gradual transition for improved fatigue resistance
Accurate Thickness: Maintains consistent wall thickness throughout the flange body
Manufacturing Excellence
Material Selection: Premium-grade stainless steel billets with full traceability
Forging Process: Closed-die forging for superior metallurgical properties
Heat Treatment: Solution annealing and quenching for optimal corrosion resistance
Machining: CNC precision machining with strict tolerance control
Quality Verification: 100% dimensional inspection and material certification
MARKING AND PACKING
Export Packaging: Wooden crates with proper bracing and waterproof lining
Surface Protection: Anti-corrosion coating and plastic end caps
Clear Marking: Permanent identification with heat numbers and specifications
Documentation: Complete mill test certificates and shipping documents
Global Logistics: Efficient shipping arrangements worldwide
INSPECTION
Material Certification: Full compliance with ASTM A182 specifications
Chemical Analysis: Spectrometer verification of composition
Mechanical Testing: Tensile, yield strength, elongation, and hardness tests
Non-Destructive Testing: Liquid penetrant, ultrasonic, or magnetic particle inspection
Surface Inspection: Visual examination for defects and surface quality
Dimensional Verification: Comprehensive measurement per ASME standards
Our Capabilities & Advantages
Custom Manufacturing: Tailored solutions for specific project requirements
Quick Delivery: Large inventory and flexible production scheduling
Technical Support: Engineering expertise for application guidance
Quality Certifications: ISO 9001:2015, PED 2014/68/EU, NACE MR0175
Global Standards: Compliance with international specifications and codes
Competitive Pricing: Cost-effective solutions without compromising quality
Why Choose Our LWN Flanges?
Proven Reliability: Extensive track record in critical applications
Technical Expertise: Deep understanding of flange design and application
Quality Commitment: Stringent quality control at every production stage
Customer Support: Responsive service and technical assistance
Industry Experience: Years of serving global clients across multiple sectors
Application
Petrochemical Processing
Long Weld Neck flanges provide secure connections in refinery reactors and high-pressure vessels, with extended necks reducing stress concentrations in cyclic service conditions. The 316L material offers excellent resistance to sulfide corrosion.
Power Generation Systems
LWN flanges serve critical roles in boiler feed systems and steam headers, where their reinforced structure maintains seal integrity under thermal cycling. The extended neck design minimizes thermal stress in high-temperature applications.
Offshore Marine Applications
These flanges withstand corrosive seawater environments in platform piping and subsea systems. 316L grade provides superior pitting resistance, while the long neck accommodates pipeline movement and vibration.
High-Pressure Pipeline Networks
In oil and gas transmission systems, LWN flanges ensure leak-proof connections at pumping stations and compressor outlets. The forged construction handles pressure surges and mechanical stresses effectively.
Our Long Weld Neck Flanges are engineered to deliver unmatched performance in the most demanding environments. With rigorous quality control and extensive manufacturing expertise, we ensure every flange meets the highest standards of reliability and durability. Contact us today to discuss your specific requirements and discover how our LWN flanges can enhance your piping system's performance and safety.
