Industrial Forged Flanges China Factory and Suppliers WN SO PL BL Standards

Leading China factory and suppliers of premium carbon, stainless, and alloy steel flanges. Offering WN, SO, PL, and BL types in ANSI, ASME, DIN, JIS, and GB standards with custom coatings for high-pressure industrial use.

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Detailed Parameters

Product Types	WN, SO, PL, BL, Spectacle Blind Flanges	Manufacturing Tech	Precision Forging
Size Range	1/2”–120”; DN15-DN3000	Pressure Classes	150#, 300#, 600#, 900#, 2000#, 3000#, 6000#, 9000#
Material Grades	ASTM A105N, A182 Gr.F304/L, F316/L, A350LF2, A694F42-F70, WP5/9/11/22	Standard Compliance	ASME B16.5, DIN, GOST12820, JIS B2220, HG20592
Surface Coating	Anti-corrosive paint, Hot Dipped Galvanized, Electro-Plating	Inspection Methods	Ultrasonic, X-Ray, Magnetic Powder, Hydraulic Pressure Test
Chemical Analysis	Mechanical Property & Metallographic Testing	Customization	Tailored production according to customer requirements

Key Advantages

Extreme Durability

Forged from high-grade ASTM materials to ensure maximum resistance against wear and high-pressure fatigue.

Instant Operation

Compatible with fast-application sealants that require no curing time, reducing system downtime.

Thermal Stability

Engineered to maintain dimensional accuracy and seal integrity under intense heat and steam.

Corrosion Resistance

Advanced galvanizing and anti-corrosive coatings protect components in harsh chemical environments.

Rigorous Testing

Every piece undergoes HIC/SSC, Ultrasonic, and X-Ray testing to guarantee zero-defect delivery.

Global Standards

Fully compliant with ASME, DIN, JIS, and GOST standards for seamless global integration.

Product Gallery

Management Platforms

Inventory Control

Real-time tracking of various flange sizes and material grades for rapid dispatch.

Quality Assurance

Strict adherence to metallographic and mechanical property tests for every batch.

Order Monitoring

Transparent pipeline tracking from forging to final coating and shipment.

Logistics Optimization

Specialized packaging for heavy steel components to ensure safe global transit.

Custom Engineering

Dedicated platform for handling customized drawings and non-standard requests.

Compliance Tracking

Digital certification management for ASME, DIN, and JIS standards.

Investment Return Comparison

Feature	Standard Flanges	Our Premium Forged Flanges
Lifespan	Moderate	Extended (High Fatigue Resistance)
Leakage Risk	Higher at Temp Spikes	Ultra-Low (Thermal Stable)
Maintenance	Frequent Inspections	Reduced Interval Maintenance
Installation	Standard Curing Time	Immediate Operation Capability
ROI Period	Short-term Savings	Long-term Operational Efficiency

Frequently Asked Questions

Q: Which flange material is best for high-temperature petrochemical use?

For high-temperature environments, we recommend ASTM A182 Gr. F304/L or F316/L for superior oxidation and corrosion resistance, or WP series alloys for extreme thermal stress.

Q: What is the difference between SO and WN flanges?

WN (Weld Neck) flanges provide better strength and are ideal for high-pressure systems, whereas SO (Slip-On) flanges are easier to align and more cost-effective for lower-pressure applications.

Q: Can you provide flanges according to GOST or JIS standards?

Yes, we manufacture flanges compliant with GOST12820, JIS B2220, as well as ASME B16.5 and DIN standards to meet global regional requirements.

Q: How do you ensure the quality of the forging process?

Our quality control includes a comprehensive suite of tests: Ultrasonic, X-Ray, Magnetic Powder, and Hydraulic Pressure tests to ensure zero structural flaws.

Q: Do you offer customized coatings for corrosive environments?

Absolutely. We offer anti-corrosive paint, hot-dipped galvanization, and electro-plating to ensure longevity in seawater, chemical, or oil-field applications.

Q: What is the lead time for custom-sized flanges?

Lead times vary based on material grade and size (from 1/2” to 120”). Please contact our engineering team for a precise production schedule based on your specifications.