Steel Pipe Flange
16MN, 20MN, 20# etc.
Alloy steel: ASTM A182, F1, F5, F9, F11, F22 etc.
Stainless steel: ASTM A182 F304/304L, F316/316L, F316Ti, F321, F904, etc.
Nickle Alloy: UNS N08020, UNS N06625, HAS C276, ETC.
Steel Pipe Flange Manufacturer & Supplier
High-Performance Connection Solutions for Global Industrial Pipelines
Product Overview
Our products are forged from premium carbon steel, stainless steel, or alloy steel. Manufactured strictly to ASME, ANSI, DIN, and EN international standards, they are designed for harsh environments such as oil, gas, chemical, power, and marine engineering, ensuring long-term stable operation.
Key Advantages
High Sealing Performance
Precision-machined sealing surfaces reduce leakage risks and ensure stable operation under high pressure.
Durable & High Strength
The forged structure is denser with higher strength, offering a significantly longer service life.
Global Compatibility
Fully compliant with ASME, ANSI, and DIN standards for seamless matching in global projects.
Corrosion Resistance
Supports stainless steel and professional anti-corrosion treatments for harsh working conditions.
Product Parameters
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Material |
Carbon steel |
Q235, ASTM A105, ASTM A36, ASTM A350 LF LF2, LF6, S235JRG2, P245GH, P250GH, P280GH, P290GH, etc |
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16MN, 20MN, 20# etc. |
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Alloy steel |
ASTM A182, F1, F5, F9, F11, F22 etc. |
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Stainless steel |
ASTM A182 F304/304L, F316/316L, F316Ti, F321, F904, etc. |
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Nickle Alloy |
UNS N08020, UNS N06625, HAS C276, ETC. |
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Flange Standard |
ANSI /ASME B16.5/16.47 |
Class 150 - Class 2500 |
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API 6A |
Class 2000 -20000 |
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AWWA C207 |
Class B-F |
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DIN |
PN1 -PN400 |
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BS |
6Bar 10Bar 16Bar 25Bar 40Bar |
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EN 1092-1 |
PN2.5 - PN400 |
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GOST12820,12821, 33259-2015 |
PN6- PN400 |
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JIS B2220 |
5K - 40K |
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AS2129 |
Table A, B, E, F, H, G, K, R, S.T. |
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Flange Size |
Insinkerator extended sink flange, 6 inch weld neck flange, Wedding neck flange, slip-one flange, socket welding flange, loose flange, plate flange, blind flange, threaded flange, lap-joint flange |
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Flange Type |
Welding neck, Slip on, Blind, Long welding neck, Spectacle Blind, |
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Lap joint, Socket, Threaded, Flat /Plate /Loose, Orifice, Anhcor, custom-made. |
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Flange Surface |
Anti-rust oil, transparent paint, Black paint, Yellow paint, hot-dipped Galvanized, electrical galvanized, Dacromet |
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Connection |
Welding, Threaded, Lap joint |
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Technical |
Forged |
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Flange Package |
Standard export packaging (Plywood Case Outside, Plastic film lining Inside). |
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Flange Heat Treatment |
Normalizing, Annealing, Quenching+Tempering |
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Flange Applications |
Petrochemical & Gas industry, Shipbuilding industry, Power industry, Valve industry, Water works, and general pipes connecting projects etc. |
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Product Types We Supply
High pressure/temp systems; uniform stress distribution.
Easy installation, cost-effective for medium/low pressure.
Used to seal pipe ends for easy maintenance/isolation.
Ideal for small diameter, high-pressure piping systems.
No welding required, suitable for non-welding environments.
Flexible installation for systems requiring frequent disassembly.
Applications
- Oil & Gas: High-pressure fluid transport.
- Chemical Industry: Corrosive media pipeline connections.
- Power Generation: Steam and cooling water systems.
- Water Treatment: Municipal and industrial pipe networks.
- Marine Engineering: Offshore piping systems.
Quality & Certification
- ISO 9001:2015 Quality Management.
- EN 10204 3.1 Material Test Certificate (MTC).
- 100% Traceable Raw Materials.
- Full Dimension & Surface Inspection before delivery.
- Supports SGS, BV, TUV Third-party inspection.
Why Choose Our Factory?
15+ Years of Manufacturing Experience
2000+ Tons Monthly Production Capacity
CNC Precision Machining Equipment
50+ Countries Exported Worldwide
OEM/ODM Customization from Drawings
Frequently Asked Questions
Q: What is your Minimum Order Quantity (MOQ)?
A: We support flexible MOQ; small trial orders for testing are also welcome.
Q: How long is the delivery time?
A: Depending on specifications and quantity, it typically ranges from 7–25 days.
Q: Do you provide material certifications?
A: Yes, we provide the EN 10204 3.1 Material Test Report with every shipment.
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