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Top Connections Types for Stainless Steel Flanges

Stainless Steel Flanges come in different grades, each with unique characteristics and strengths. Popular options in the market include Slip On Flanges, Weld Neck Flanges, Blind Flanges, Long Weld Neck Flanges, Threaded Flanges, Lap Joint Flanges, Socket Weld Flanges, and Orifice Flanges.

The Benefits and Uses of Stainless Steel Flanges

Flanges are integral components for attaching pipes, valves, and other equipment used in industrial applications. Not only do they provide convenience when cleaning, repairing, or inspecting, but they must be judiciously selected in high-load industries, as they can become a vulnerable spot in the structure.

Depending on the application, pressure, and temperature requirements, you can connect Stainless Steel Flanges to piping systems using various methods. While perusing the stainless-steel flange fittings market, it is helpful to be aware of some types available and their specific characteristics.

Here are some common connection types for stainless steel flanges:

Different types of stainless-steel flanges used

Slip on Flange:

A Slip-On Flange is a type of flange placed over the end of the pipe, and its face extends from the end of the pipe far enough for a weld bead that you can apply on its inner diameter

. In this type of connection, the flange slips over the end of the pipe or fitting, and you can weld it in place.

If you are trying to stick to a tight budget, these flanges are the best choice as they are more affordable than others while still accomplishing the task. In addition,

Slip on Flanges are slightly larger than the pipe itself, thus making them easier to slide. Unfortunately, the flange is fillet welded in place. Hence, it is not suitable for handling high pressures.

However, they are helpful in bellows and extensively in low-pressure and low-temperature applications, and it is less expensive and easier to install than a welded flange.

Long Weld Neck Flanges:

If you want to boast a protruding neck, weld neck flanges are an excellent choice for high-pressure systems, as their hub tapers long and the flange itself is the same thickness as the pipe, thus creating ideal conditions for withstanding severe service.

In particular, they are used to join piping systems by way of Bun Welding and have become extensive for use in expansion joints and heat exchangers.

Blind Flanges:

Boasting all necessary bolt holes without a central opening, a Blind Flange is a round plate specifically utilized to block piping systems and vessels from the effects of internal pressure.

Particularly popular in chemical industries, this stainless-steel part can also help facilitate frequent inspections.

Threaded Flanges:

In this type of connection, the flange has internal threads that mate with the external threads of the pipe or fitting. It is common in low-pressure and low-temperature applications and allows easy disassembly and maintenance.

Threaded flanges are distinct from slip-on pipe flanges in that their bore is threaded though both can be the carbon steel flanges type. Suitable for specific situations, they can be assembled without welding, thus true to their name.

These flanges fit perfectly on pipes with external threads but are not optimal for settings; where significant pressure, temperature, or strain is present.

Lap Joint Flanges:

In Lap Joint Flange Connection, the flange design can slide over the stub end of the pipe or fitting. The two components are bolted together and extensively used in applications where frequent disassembly is essential.

Lap Joint Flanges are ideally suited for applications requiring frequent inspection and maintenance, as they slip over the pipe and pair with Stub End Fittings. In addition, this type of slip-on flange is convenient and cost-effective.

Socket Weld Flanges:

Socket Weld Flanges are reliable and suitable for small-diameter piping under high pressure. Internal welds enhance the strength and sturdiness of the flanges, making them ideal for usage in the chemical processing industry.

In addition, spiral Welded tubes with Socket Weld Flanges can help in burner pipes and flues.

In the Socket Weld Flange connection, the pipe or fitting is inserted into the flange socket and then welded in place. It is common in high-pressure and high-temperature applications, requiring a strong and leak-tight connection.

Orifice Flanges:

Stainless steel orifice flanges are specialized flanges that helps systems requiring precise flow measurement or control. They feature a concentric or eccentric bore machined to accept an orifice plate that creates a differential pressure across the plate as fluid flows through the orifice. This pressure drop helps to calculate the flow rate of the fluid.

Orifice flanges come in different types and sizes. Choosing the right one for your application depends on the fluid transported, the required flow rate, and the system pressure and temperature.

Orifice Flanges are used instead of conventional pipe flanges when orifice plates or flow nozzles are required. This specialized flange grants access to metering liquids and gases and can be easily fitted alongside orifice plates or flow nozzles.

Ring-Type Joint Flanges

These robust flanges can withstand even the harshest temperatures and pressures, featuring a groove for quick compression onto slip-on, bind, or weld neck flanges, making them an invaluable resource in preventing leakage in high-pressure pipelines.

Why Choose Stainless Steel Flanges?

Investing in stainless steel flanges gives you the most for your money. Here is why it’s worth it.

Corrosion resistant with nearly $9 billion spent in the United States on pipeline corrosion issues, selecting flanges that can withstand rust, chemicals, and other environmental conditions is essential. In these cases, stainless steel proves to be an optimal choice due to its strong corrosion resistance.

  • High Durability

Aluminum lacks the same strength and resistance to pressure, costing less than stainless steel. But conversely, stainless steel can withstand much more stress, making it a reliable and lasting choice.

  • Withstand High Temperature

The world of industries can be harsh and unforgiving, where the temperatures can soar to unimaginable heights.

But behold, there still exists a savior in the form of stainless-steel flange fittings that can endure such extreme temperatures without any signs of deformation or warping.

With these fittings in place, you can rest assured that your system will remain uncompromised and function optimally!


Overall, the choice of connection type depends on several factors, including the application, pressure, temperature, and material compatibility.

Consult a qualified engineer or supplier to select the appropriate connection type for your specific application.

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ERP Software
9 months ago

Very good article on learning about stainless steel flanges.

ERP Software
9 months ago

This is very interesting and informative article on stainless steel flages.

S Ford
S Ford
8 months ago

The variety of stainless-steel flanges mentioned here, such as Slip-On, Weld Neck, and Blind flanges, illustrates the versatility needed for different industrial applications. Understanding their characteristics is crucial for selecting the right flange to ensure a reliable and efficient piping system.

8 months ago

The blog emphasizes the significance of corrosion resistance in flange selection, highlighting stainless steel’s role in combating rust and chemicals. This aspect becomes even more crucial considering the substantial costs associated with pipeline corrosion issues.

8 months ago

What is the primary advantage of using stainless steel flanges over other materials in terms of durability and pressure resistance?

Eng Mike
Eng Mike
8 months ago

Why are Orifice Flanges preferred for systems requiring precise flow measurement or control, and how do they achieve this function?

S Ford
S Ford
8 months ago

Stainless steel flanges offer superior strength and durability compared to materials like aluminum. They can withstand higher stress levels and pressures, making them a reliable choice for demanding industrial applications.

8 months ago

The detailed explanations about the different types of flanges, like Socket Weld and Orifice flanges, offer valuable insights into their specialized uses and benefits. It’s evident that proper flange selection can significantly impact system performance and maintenance.