O que é um flange deslizante?

Em sistemas de tubulação industrial, escolher o flange certo é essencial para garantir segurança, durável, e conexões econômicas. Entre os muitos tipos disponíveis, o flange deslizante is one of the most commonly used due to its simplicity, affordability, e facilidade de instalação. It is a popular choice for systems operating under moderate pressure and temperature conditions.

This article provides a detailed explanation of what a flange deslizante é, how it is constructed, its benefits, aplicações comuns, and why it is favored in many industries. Whether you’re involved in pipeline design, plant maintenance, or equipment manufacturing, understanding the function and value of slip-on flanges is key to making informed decisions.

Definition of a Slip-On Flange

UM flange deslizante, frequentemente abreviado como SO flange, is a type of flange that is slipped over the pipe before being welded into place. Ao contrário dos flanges de pescoço soldado, which require precise alignment and butt welding, slip-on flanges are easier to position and align, making them ideal for quick and efficient installations.

The slip-on flange is typically attached to the pipe with two fillet welds — one on the inside and one on the outside of the flange — providing a strong and stable connection suitable for low to moderate pressure systems.

Características estruturais

Slip-on flanges have a simple design that consists of the following elements:

UM flat face or raised face to accommodate gasket sealing
UM slightly larger inner diameter than the pipe’s outer diameter, allowing the pipe to pass through
Furos de parafusos arranged around the circumference for connecting to other flanges or equipment

No sasa oblonga, we offer slip-on flanges in a wide range of sizes and materials that comply with international standards such as ASME B16.5, EN 1092-1, and API specifications.

Vantagens dos flanges deslizantes

Slip-on flanges are widely used due to their many advantages, especially in non-critical applications:

1. Fácil instalação

Their design allows the pipe to simply slip through the flange opening. This makes alignment much easier and faster than with flanges that require butt welding.

2. Lower Cost

Slip-on flanges typically cost less to manufacture and install. The welding process is less complex and time-consuming, reducing labor costs.

3. Versatilidade

These flanges can be used with both pipes and tubing and are suitable for a variety of fluid systems including air, água, óleo, and gas.

4. Design Compacto

Slip-on flanges have a shorter overall profile compared to weld neck flanges, making them suitable for systems where space is limited.

5. Available in Multiple Pressure Ratings

Although best for low to medium pressure, slip-on flanges are available in pressure classes ranging from Aula 150 para a aula 600.

Aplicativos comuns

Flanges deslizantes are widely used in a variety of industries, especially where pressure and thermal cycling are moderate:

Water treatment and distribution systems
HVAC and mechanical piping
Oil and gas utilities (non-critical lines)
Food and beverage processing
Chemical and pharmaceutical plants
Firefighting systems and compressed air lines

No sasa oblonga, we supply slip-on flanges to support global clients in construction, mechanical contracting, and utility infrastructure.

Materials and Standards

Flanges deslizantes are available in a variety of materials to meet different operating environments:

Aço carbono for general use
Aço inoxidável for corrosion-resistant applications
Liga de aço for higher temperature or pressure resistance
Aço inoxidável duplex for critical environments like offshore installations

Each material type meets international standards, ensuring compatibility and performance reliability across multiple industries.

Slip-On Flange vs Other Flange Types

To understand where slip-on flanges fit into the larger picture, let’s compare them to other common flange types:

Slip-On vs Pescoço Soldado: Slip-on flanges are easier and cheaper to install but offer less strength and sealing capability compared to weld neck flanges
Slip-On vs Solda de Soquete: Socket weld flanges are better for small diameter pipes and high pressure; slip-ons are more versatile for general applications
Slip-On vs Blind Flanges: Blind flanges are used to close pipe ends, while slip-ons are used for pipe-to-pipe or pipe-to-equipment connections

Each flange type has its own strengths, but slip-on flanges remain a go-to option for systems that balance performance with economy.

Diretrizes de instalação

Proper installation is essential to ensure the effectiveness and safety of a slip-on flange. The steps generally include:

Deslize o flange sobre a extremidade do tubo
Position the flange at the desired location
Perform two fillet welds — one inside and one outside the flange
Bolt the flange to its mating pair with a gasket in between

While installation is simpler than with other flange types, proper welding and gasket selection remain crucial for system reliability.

Conclusão

O flange deslizante is a cost-effective, versatile, and easy-to-install solution for piping systems that operate under moderate pressure and temperature conditions. Its straightforward design and simple welding process make it a preferred choice in many industries for non-critical applications.

Whether you are planning a new piping system or upgrading existing infrastructure, the slip-on flange offers an efficient balance of desempenho, affordability, and simplicity.

For high-quality slip-on flanges manufactured to meet international standards, vire para sasa oblonga — your trusted source for precision-engineered flange products built for long-term performance and reliability.