Slip On Flanges Suppliers

Slip On Flanges offer several practical and cost-effective advantages, especially in non-critical piping systems. Here's why they are widely preferred:

1. Ease of Installation:

   Slip On Flanges are easier to align and weld compared to Weld Neck or Socket Weld Flanges. Since the flange simply "slips" over the pipe, it allows more flexibility in alignment during installation.

2. Lower Cost:

   These flanges are less expensive both in terms of material and labor. The shorter hub and minimal welding requirements reduce fabrication costs, making them ideal for budget-sensitive projects.

3. Double Welding for Strength:

   They are welded both on the inside and outside, offering good sealing and structural integrity, especially for systems operating under low to moderate pressure.

4. Ideal for Low Pressure Applications:

   Slip On Flanges are best suited for systems where pressure and temperature fluctuations are minimal, such as in cooling water lines, firefighting systems, HVAC, and water pipelines.

5. Availability in FF and RF Types:

   Available in both Flat Face (FF) and Raised Face (RF) options, as well as in SORF and SOFF variants — giving engineers flexibility based on sealing surface requirements.

In summary, Slip On Flanges are a cost-effective, easy-to-install, and technically sound solution for piping systems that don’t require the high-performance capabilities of Weld Neck or RTJ flanges.

While both Slip On and Weld Neck Flanges are used to connect pipes, their design and application differ significantly. A Slip On Flange has a flat surface and a bore slightly larger than the pipe’s outer diameter, allowing it to slip over the pipe and be welded from both sides. It has a shorter hub and is easier to install, making it suitable for low-pressure and low-temperature systems.

On the other hand, a Weld Neck Flange features a long tapered hub that provides gradual stress transfer between the pipe and flange, reducing the risk of fatigue. It is butt-welded to the pipe and is primarily used in high-pressure, high-temperature, and critical service environments such as refineries, power plants, and offshore platforms.

Slip On Flanges are most commonly used in non-critical and general-purpose piping systems where frequent disassembly is not required and operating pressures are relatively low. Their popularity comes from the fact that they are easy to align, require less precise pipe cutting, and reduce fabrication time — making them ideal for industries focused on cost-efficiency and moderate operating conditions.

Typical applications include:

1. Cooling water lines in industrial plants
2. Compressed air and steam lines
3. Firefighting piping systems
4. Low-pressure chemical processing
5. Shipbuilding and marine applications
6. Oil and gas utility pipelines (non-critical segments)

This balance of cost, ease of use, and functional reliability makes Slip On Flanges a smart choice for many industrial systems that don’t demand high pressure or thermal endurance.

Welding plays a crucial role in ensuring the mechanical integrity and leak-tight performance of Slip On Flanges. Unlike flanges that rely on butt welding (like Weld Neck), Slip On Flanges are attached by performing fillet welds on both the inside and outside of the flange. This dual weld configuration helps anchor the flange securely while providing moderate resistance to internal pressure and vibration.

However, because the weld is not as deep or robust as a full penetration butt weld, Slip On Flanges are not recommended for critical or high-pressure services. The welding process also introduces slight thermal stresses at the joint, which is manageable in low-to-medium pressure systems.

Proper welding ensures that:

• The flange remains aligned with the pipe
• There’s no leakage at the pipe-to-flange joint
• The flange retains its load-bearing capacity
• Vibration or thermal expansion doesn’t compromise the seal

We ensure fast, reliable delivery with full documentation for these markets, guaranteeing timely service and high-quality products.

Yes, Slip On Flanges are compatible with both seamless and welded pipes, offering design flexibility across various piping systems. Their slip-over design allows them to fit over the pipe's outer diameter regardless of the pipe manufacturing method.

• When used with seamless pipes, Slip On Flanges provide a cleaner flow profile and are preferred in systems where corrosion resistance and internal smoothness are critical.
• When paired with ERW or welded pipes, they remain a cost-effective solution, especially for utility lines, low-pressure steam, or water distribution systems where weld seam visibility is not a concern.

The key factor is ensuring proper pipe end preparation (square-cut) and welding from both sides to maintain structural integrity and leak resistance, regardless of pipe type.

We are trusted exporter of Slip On Flanges to major global industrial hubs, supplying flanges that meet international standards like ASME B16.5, EN 1092-1, DIN, and JIS. We have a strong export presence in key regions such as the USA, Europe, and the Middle East, with regular shipments to countries including:

• United States – Houston, New York, Los Angeles
• Germany – Hamburg, Düsseldorf, Munich
• United Arab Emirates – Dubai, Abu Dhabi, Sharjah
• Saudi Arabia – Dammam, Riyadh, Jeddah
• Italy – Milan, Genoa, Turin
• Spain, France, Netherlands, and Qatar

Our Slip On Flanges are supplied to industries such as oil & gas, petrochemicals, power generation, marine, and water treatment plants, with certifications and documentation to meet project-specific requirements.