Slip On Flange Supplier
OIS Middle East is a trusted Slip On Flange Supplier, providing premium-quality slip on (SO) flanges for industrial piping systems across the oil & gas, petrochemical, power generation, marine, offshore, water treatment, construction, and manufacturing industries. Our flanges are precision-manufactured to international standards, offering excellent dimensional accuracy, reliable sealing performance, and long service life.
Slip on flanges are one of the most commonly used flange types due to their ease of installation, cost-effectiveness, and versatility. They are designed to slide over the pipe before being fillet welded on both the inside and outside, providing a strong and leak-resistant connection.
Manufactured from carbon steel, stainless steel, alloy steel, duplex stainless steel, super duplex stainless steel, and nickel alloys, our slip on flanges are suitable for low, medium, and high-pressure piping applications.
With extensive inventory, technical expertise, and dependable logistics, OIS Middle East supplies slip on flanges across the UAE, GCC countries, Africa, and international export markets
A Slip On Flange (SO Flange) is a circular flange with a bore slightly larger than the outside diameter of the pipe. The flange slips over the pipe and is secured by fillet welding on both sides.
Compared to weld neck flanges, slip on flanges are easier to align and install, making them a preferred choice for moderate-pressure applications where quick fabrication and economical installation are important
- Excellent sealing performance
- Easy alignment
- Cost-effective installation
- Suitable for most industrial applications
- Water treatment plants
- Low-pressure piping
- Utility services
- Superior sealing
- High-pressure capability
- Reliable performance
- Leak-resistant design
- ASTM A105
- ASTM A350 LF2
- ASTM A182 F304
- ASTM A182 F304L
- ASTM A182 F316
- ASTM A182 F316L
- ASTM A182 F321
- ASTM A182 F347
- ASTM A182 F51
- ASTM A182 F60
Super Duplex Stainless Steel
- ASTM A182 F53
- ASTM A182 F55
- ASTM A182 F11
- ASTM A182 F22
- ASTM A182 F91
Nickel Alloys
Available upon request:
- Inconel 625
- Inconel 825
- Monel 400
- Hastelloy C276
- Alloy 20
Our slip on flanges are manufactured according to internationally recognized standards.
- ASME B16.5
- ASME B16.47 Series A
- ASME B16.47 Series B
- MSS SP-44
- API 605
- EN 1092-1
- DIN Standards
- ISO 7005
Pressure Ratings
Available pressure classes include:
- Class 150
- Class 300
- Class 600
- Class 900
- Class 1500
- Class 2500
PN-rated flanges are also available.
- PN6
- PN10
- PN16
- PN25
- PN40
- PN64
- PN100
We stock slip on flanges in a comprehensive range of sizes.
- ½ Inch to 60 Inches (NPS)
Larger custom sizes are available upon request
Facing Types
Available flange facings include:
- Raised Face (RF)
- Flat Face (FF)
- Ring Type Joint (RTJ)
Surface Finish & Coating Options
Depending on the application, we provide:
- Natural Finish
- Black Painted
- Anti-Rust Oil Coating
- Hot Dip Galvanized
- Epoxy Coating
- Pickled & Passivated (Stainless Steel)
| Specification | Details |
|---|---|
| Product | Slip On Flange |
| Standards | ASME B16.5 / B16.47 |
| Material | Carbon, SS, Duplex, Alloy |
| Size | ½”–60″ |
| Pressure | Class 150–2500 |
| Facing | RF, FF, RTJ |
| Manufacturing | Forged / Plate |
| Certification | EN 10204 3.1 / 3.2 |
Our slip on flanges offer:
- Easy installation
- Simple pipe alignment
- Reduced fabrication costs
- Strong welded connection
- Excellent sealing capability
- Suitable for multiple pressure classes
- Corrosion-resistant material options
- Long service life
- Low maintenance
- Manufactured to international standards
Inspection & Testing
- Dimensional Inspection
- Visual Inspection
- Positive Material Identification (PMI)
- Ultrasonic Testing (UT)
- Hardness Testing
- Chemical Analysis
- Mechanical Testing
- Hydrostatic Verification (where applicable)
- Third-Party Inspection
- EN 10204 3.1 Mill Test Certificate
- EN 10204 3.2 Certificate
- Material Test Reports (MTR)
- Inspection Reports
- Product Traceability Documentation
We provide complete flange solutions.
- CNC Machining
- Custom Drilling
- Galvanizing
- Pickling & Passivation
- Epoxy Coating
- Laser Marking
- Export Packaging
- Third-Party Inspection Coordination
- Logistics Support
- Large ready stock
- International quality standards
- Competitive pricing
- Fast delivery across UAE & GCC
- Technical engineering support
- Custom manufacturing capability
- Global sourcing network
- Complete documentation
- Experienced sales engineers
- Reliable after-sales support
Our slip on flanges are supplied to:
- Oil & Gas
- Petrochemical
- Power Generation
- Marine & Offshore
- Chemical Processing
- Water Treatment
- Construction
- Infrastructure
- Manufacturing
- Industrial Utilities
We supply slip on flanges across:
- Dubai
- Abu Dhabi
- Sharjah
- Ajman
- Ras Al Khaimah
- Fujairah
- Umm Al Quwain
- Saudi Arabia
- Oman
- Qatar
- Kuwait
- Bahrain
- Africa
- International Export Markets
- FAQ
A slip on flange slides over the pipe and is secured with fillet welds on both sides, making installation easier and more economical. A weld neck flange has a tapered hub and is butt welded to the pipe, making it more suitable for high-pressure, high-temperature, and cyclic service
Our flanges are manufactured according to ASME B16.5, ASME B16.47, API, MSS, EN, DIN, and ISO standards
Yes. We provide custom dimensions, drilling patterns, materials, and coatings according to project specifications
Yes. OIS Middle East supplies slip on flanges throughout the UAE, GCC, Africa, Asia, Europe, and international markets
Simply provide the flange standard, material grade, size, pressure class, facing type, quantity, and project specifications. Our technical sales team will prepare a detailed quotation with complete documentation
Yes. We supply API 5L pipes across the UAE, GCC countries, Africa, and global export markets.
Share your required grade, PSL level, size, wall thickness, quantity, coating requirements, and delivery location with our sales team for a customized quotation.
