Slip On Flange (SO)
Yunming Metal offers stainless steel slip on flanges (SO flanges) for pipeline systems requiring easy alignment and cost-effective installation. Manufactured in 304/316L/321, supporting ANSI, EN, and JIS standards, ideal for oil & gas, water, and industrial piping.
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Product Overview
Slip on flanges (SO flanges) are widely used pipe flanges that are slipped over the pipe and fillet welded into place. They are ideal for low-pressure, non-critical applications requiring easy installation and alignment. Manufactured from corrosion-resistant stainless steel, these flanges support a wide range of standards and sizes—from DN15 to DN3000—making them suitable for both standard and large-diameter piping systems.
Application Areas
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Oil and gas pipelines
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Petrochemical and chemical plants
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Water and wastewater treatment systems
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Fire protection and HVAC piping
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Power generation and shipbuilding
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Industrial infrastructure projects
Product Features
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Supports large diameters up to DN3000
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Easy installation with outer and inner fillet welds
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Smooth bore minimizes flow restriction and turbulence
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Precision machined sealing surface for leak-free connection
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Available in ANSI, EN, JIS, and other international standards
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Anti-corrosion performance with grades 304, 316L, 321, etc.
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | ANSI, ASME, DIN, BS, JIS, GB, ISO etc. |
| Material Grades | 304, 304L, 316, 316L, 321, 321H, 317, 317L, 310S, 309S, 347, 347H, 316Ti, 904L, 2205, 2507, 201, 202, 301, 302, 303, 410, 420, 430, etc. |
| Type | Slip On Flange, Welding Neck Flange, Blind Flange, Socket Welding Flange, Threaded Flange, Lap Joint Flange, Plate Flange, Flat Flange, Long Welding Neck Flange etc. |
| Connection Type | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Lap Joint Face, Large/Small Male-Female, Large/Small Tongue & Groove etc. |
| Size Range | DN40 – DN3000 (approx. 1½″ – 120″) |
| Pressure Ratings | Class 150 – 2500 / PN6 – PN100 |
| Surface Finish | CNC machined, anti-rust oil coating, smooth sealing surface |
| Application | Constructions, petroleum, chemical industry, power plants, shipbuilding, metallurgy, paper making, water supply & sewage, HVAC, electric systems, light/heavy industry, plumbing etc. |
Manufacturing Process
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Raw Material Preparation – Stainless steel billets or plates are selected and cut to size.
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Forging or Rolling – Flange blanks are shaped through forging or rolling processes.
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Heat Treatment – Applied for stress relief and improved mechanical properties.
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CNC Machining – Faces, bolt holes, and sealing surfaces are precision-machined.
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Inspection – Dimensional checks, pressure testing, and surface evaluation.
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Marking & Packaging – Each flange is stamped per standard and safely packaged.
FAQ
Q1: What is the maximum size you can produce?
A: We can manufacture slip on flanges up to DN3000 (approx. 126″ OD).
Q2: Can you supply flanges with specific drilling standards like ANSI or EN1092?
A: Yes, we offer multiple international standards including ANSI B16.5, EN 1092-1, and JIS.
Q3: What materials are available for corrosive environments?
A: We offer 304, 316L, 321, and duplex stainless steels for enhanced corrosion resistance.
Q4: Do you provide factory inspection reports or third-party certificates?
A: Yes, EN 10204 3.1/3.2 MTCs and third-party inspections are available on request.
Q5: How soon can large-diameter flanges be delivered?
A: Standard lead time is 20–35 days. Urgent or bulk orders can be expedited.
Still have questions?
Feel free to contact us for more details or to discuss your custom stainless steel slip on flange requirements. Our technical support team is ready to assist with specifications, certifications, and delivery.
