Long Weld Neck Flange

As a trusted Long Weld Neck Flange Manufacturer, we specialize in producing high-performance flanges designed for high-pressure and high-temperature applications. Our long weld neck flanges are engineered to provide smooth stress distribution and excellent structural integrity in critical piping systems. Manufactured from premium-grade raw materials using advanced technology, these flanges ensure superior strength, dimensional accuracy, and corrosion resistance. Widely used in oil & gas, petrochemical, refinery, power generation, and industrial sectors, our products meet international standards such as ASTM, ASME, and ANSI. Available in various sizes and specifications, we ensure consistent quality, competitive pricing, and timely delivery to meet global project requirements.

Long Weld Neck Flange Standard Specifications

Standards/Dimensions : ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, BS, GOST,  SS SP-44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605

Flange Face Types/Connection Type : Flat Face Flange (FF), Raised Face Flange (RF), Ring Joint Flange (RTJ), Lap Joint Flange, Male and Female Flange (M&F), Large and Small Tongue-and-Groove Flange (T&G)

Custom Design : As per your drawing | AS, BS, ANSI, DIN, JIS | Equal and Reducing Configurations

Material Test Certificates (MTC) : As per EN 10204 3.2 and EN 10204 3.1, Test Certificates certifying NACE MR0175, NACE MR0103

Test Certificates : 100% Radiography Test Report, EN 10204/3.1B, Raw Materials Certificate, Third Party Inspection Report, etc

Tests : Hydrostatic testing machine, Direct-reading Spectrograph, UI trasonic flaw detector, X-ray detector, Magnetic particle detector

Equipment/Machines : Press machine, Pushing Machine, Bending machine, Sand-blasting machine, electric bevelling machine, etc.

Coating : Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized

Details :

• Long Weld Neck Flange Material Grades
• Long Weld Neck Flange Standards
• ASME B16.5 Long Weld Neck Flange Class 150 Dimensions
• ASME B16.5 Long Weld Neck Flange Class 300 Dimensions
• ASME B16.5 Long Weld Neck Flange Class 400 Dimensions
• ASME B16.5 Long Weld Neck Flange Class 600 Dimensions
• ASME B16.5 Long Weld Neck Flange Class 900 Dimensions
• ASME B16.5 Long Weld Neck Flange Class 1500 Dimensions
• ASME B16.5 Long Weld Neck Flange Class 2500 Dimensions
• How To Order Long Weld Neck Flanges?
• Long Weld Neck Flange Industries and Applications
• Long Weld Neck Flanges Supply and Export Network
• Long Weld Neck Flange Price and Other Flange Types
• Weld Neck Flange
• Long Weld Neck Flange
• Slip On Flange
• Spectacle Blind Flanges
• Socket Weld Flanges
• Blind Flanges / Dummy Flange
• Screwed / Threaded Flanges
• Orifice Flanges
• Lap Joint Flanges
• ANSI B16.5 Square Flanges
• Ring Type Joint Flanges
• Tongue and Groove Flange
• Expander Flanges
• Reducing Flanges
• Male & Female Flanges
• Weldolet Flange
• Nipolet Flange
• Backing Ring Flanges
• Ring Spacer Flanges
• Paddle Blind Flanges
• Plate Flange
• High Hub Blind Flange
• Custom Flanges
• Swivel Ring Flange