Slip-On Flanges
Stellanox Steel is a leading manufacturer and global supplier of precision-engineered Slip-On Flanges designed for low to moderate pressure piping systems. Fabricated using high-quality Stainless Steel, Carbon Steel, Alloy Steel, Inconel, Monel, Hastelloy, Copper Alloys, and Titanium, our slip-on flanges are preferred for their ease of installation, cost-effectiveness, and versatile application across oil & gas, power generation, chemical, marine, HVAC, and water treatment sectors.
Available in both raised face (RF) and flat face (FF) options, all our slip-on flanges meet global quality standards like ASME B16.5, B16.47, DIN, EN, and ISO.
What are Slip-On Flanges?
Slip-On Flanges (SO Flanges) are ring-shaped flanges that slide over the pipe and are welded from both inside and outside to provide strong, leak-resistant connections. These flanges are ideal for low-pressure systems, non-critical pipelines, and systems where frequent disassembly is not required.
Due to their low initial cost, minimal weld preparation, and simple alignment, slip-on flanges are commonly used in water lines, cooling systems, fire protection lines, and compressed air networks.
| Products |
|---|
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Stainless Steel |
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Carbon Steel |
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Duplex Stainless Steel |
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Super Duplex Stainless Steel |
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Alloy Steel |
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Titanium |
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Hastelloy |
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Inconel |
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Monel |
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Aluminium |
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Copper |
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Pure Nickel |
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Flanges |
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Forged Fittings |
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Valves |
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Fasteners |
Key Features
Easy to Install and Align
Requires Less Precision in Pipe Cutting
Double-Welded for Improved Strength
Economical Option for Low-Pressure Systems
Available in RF, FF, and Custom Face Types
ASME, EN, DIN, ISO, and BS Compliant
Specification
| Property | Details |
|---|---|
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Sizes Available
|
½” NB to 60” NB (DN15 – DN1500) |
|
Pressure Ratings
|
Class 150 to Class 2500
|
|
Face Types |
RF (Raised Face), FF (Flat Face), RTJ (on request)
|
|
Materials |
SS (304/316), CS (A105), Alloy Steel (F11/F22), Monel, Inconel, Hastelloy |
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Standards |
ASME B16.5, B16.47, EN 1092-1, DIN 2576, ISO 7005 |
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Connection Method |
Slip-On + Fillet Weld (Inner & Outer) |
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Certification |
EN 10204 3.1/3.2, NACE, PED, ISO, CE, IBR |
Materials and Equivalent Grades
| Material | Grades |
|---|---|
|
Stainless Steel |
304, 304L, 316, 316L
|
|
Carbon Steel |
ASTM A105, A350 LF2 |
|
Alloy Steel |
A182 F11, F22 |
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Nickel Alloys |
Inconel 600/625, Monel 400 |
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Copper Alloys |
Brass, Bronze, Cu-Ni |
|
Titanium |
Grade 2, Grade 5 |
Weight
| Size (inches) | Approx. Weight (kg) | Pressure Class | Standard |
|---|---|---|---|
| 2" | 2.40 | 150# | ANSI B16.5 |
| 4" | 5.40 | 150# | ANSI B16.5 |
| 6" | 9.90 | 150# | ANSI B16.5 |
| 8" | 16.80 | 150# | ANSI B16.5 |
| 10" | 25.80 | 150# | ANSI B16.5 |
Applications
Water Supply Systems: Pump and tank connections, header assemblies
Fire-Fighting Systems: Hydrant lines, deluge systems
Cooling & HVAC Systems: Chillers, condensers, cooling towers
Compressed Air & Gas Systems: Utility air lines, pneumatic systems
Marine Piping: Ballast systems, drainage lines
Food & Beverage Systems: Non-critical flow systems and sanitary lines
Benefits
Lower Cost vs Weld Neck Flanges
Simpler Alignment with Less Pipe Prep
Strong Connection via Dual Fillet Welds
Easy to Dismantle, Inspect, and Replace
Available in All Sizes, Ratings, and Materials
Ideal for Non-Critical, Low-Stress Systems
2025 Stellanox Steel |