Forged Steel Flange

Full Range of ASME B16.5 B16.47 Flanges and GOST,DIN ,EN Flanges

Available Types

Slip-On, Welding Neck, Blind, Socket Welding, Threaded, Lap Joint, Plate Flanges, etc.

Wall ThicknessSch10 – XXS

Pressure Class150# – 9000 LBS

Surface TreatmentAnti-rust Oil, Black/Yellow Paint, Galvanized (Hot-dipped & Electric)

Find the right dimensions and style for any critical application with our engineering support.

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Forged Steel Flange Manufacturer | High-Pressure Piping Solutions

Precision Forged Flanges according to ASME, EN, DIN, GOST, and API Standards

JS FITTINGS is a tier-1 industrial flange factory specializing in high-performance forged steel pipe flanges. From standard WN/SO/BL types to custom-engineered heavy-duty flanges, we provide UT-tested components for global infrastructure.

Comprehensive Flange Range for Every Pipeline

Weld Neck Flange (WNRF)Ideal for high-pressure and high-temperature systems. Excellent stress distribution through the tapered neck.

Slip-On Flange (SORF)Easy to align and cost-effective for lower-pressure applications. Double-welded for reliable sealing.

Blind Flange (BLRF)Critical for sealing the end of piping systems or pressure vessel openings. Available in heavy-wall designs.

Socket Weld & ThreadedSpecialized for small-diameter high-pressure piping where space or welding constraints exist.

Key Application Fields

Oil and Gas

High-pressure pipelines, refineries, and offshore drilling platforms.

Petrochemical

Chemical processing plants and hazardous material storage tanks.

Power Generation

Steam cycles in thermal power plants and nuclear cooling facilities.

Water Treatment

Wastewater treatment plants and large-scale desalination projects.

Automotive & Construction

Engine exhaust systems and structural HVAC installations.

Technical Specifications & Standards

Category	Reference Specifications
Standards	ASME B16.5, B16.47 Series A & B, EN 1092-1, DIN 2527/2633, GOST 12820, API 6A
Pressure Class	150#, 300#, 600#, 900#, 1500#, 2500# \| PN6, PN10, PN16, PN25, PN40, PN64, PN100
Material Grades	Carbon: ASTM A105, A350 LF2, LF3 \| Stainless: F304/L, F316/L, F321, F347 Alloy: ASTM A182 F5, F9, F11, F22, F91 \| Duplex: F51, F53, F55, F60
Face Types	Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Tongue & Groove (T&G)

Our Forged Flange Production Process

Forged Carbon Steel Flange production producess

Field Success: Solving Flange Integrity Issues

Case Study: Offshore Platform Replacement

The Challenge: A client in Brazil faced recurring leaks on SORF flanges due to uneven sealing surfaces and material pitting in a salt-spray environment.

The JS Solution: We provided ASTM A182 F316L RTJ Flanges with specialized anti-corrosion packaging. Our engineers suggested a 125-250 RMS serrated finish for the raised face to enhance gasket grip.

The Result: Zero leakage during the 5000 PSI pressure test and extended maintenance intervals by 35%.

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Why Choose JS FITTINGS as your Industrial Flange Supplier

Induction Forging

Unlike casting, our forging process eliminates internal porosity and grain flow defects, providing the structural integrity required for critical-pressure containment.

Precision CNC Machining

Perfect sealing surfaces (RF/RTJ) are machined to precise RMS finishes to ensure leak-free performance even under extreme vibration and thermal cycling.

Full Material Traceability

Every single flange is hard-stamped for traceability and accompanied by a Mill Test Certificate (EN 10204 3.1) covering chemical and mechanical properties.