Everything about Slip on Flanges Slip-on flanges are a secure and leak-proof alternative to other flanges. These flanges help connect pipes and pipe systems with zero leakage. You must slip the flange into the end line and ensure its inner diameter meets the pipe's outer diameter. It will help with smooth transitioning and maintaining a consistent flow of liquid.

What are slip-on-flanges?

Slip-on flanges slip over the outside diameter of the pipe and welded to the pipe are the most common connection.They are used primarily in low-pressure situations up to 300 psi . Also, these flanges are known as slip-on because you can easily slip them onto any end of a pipe. In the end, weld them in place. Here, you’ll know everything about slip-on flanges’ uses, types, differences, and price. You’ll learn the fundamentals of slip-on flanges.

What are the uses and Types of Slip-on Flanges?

The two types of slip-on flanges are designed to serve specific applications and requirements of piping systems:

  1.   Standard slip-on flanges: These flanges have a raised face on the sealing. It is a crucial feature as it forms a platform for the gasket. It also helps seal the flange and pipe tightly. There is, hence, no movement between the two. Hence, these flanges are highly beneficial in low-pressure situations. It can only help prevent leakage under low pressure. However, opt for another flange, such as a weld neck flange, if you wish to operate in high pressure.
  2.   Lap Joint slip-on flanges have a flat face and separate backing flange. The backing flange over the pipe aligns with the lap joint stub end. The lap joint slip-on flange is helpful if there is a lot of rotational movement and you want flexibility in alignment. It is beneficial during the installation process. It is highly used in thermal expansion, dismantling systems, and contraction appliances.

Slip-on flanges help pass fluids in low-pressure and environmental conditions. Also, there is no chance of leakage with slip-on flanges. You can easily use these flanges in cooling, low-pressure airlines, and firefighting water lines. Besides, slip-on flanges are highly useful in process tubes. It helps maintain the flow of steam, gas, oil, and condensates.

Moreover, slip-on flanges are easy to install and come at a very reasonable cost. You can also use these flanges as lap joint flanges. However, there should be a Type B or Type C end for lap joint flanges.

Difference Between a Flange and a Slip-on Flange

Before welding, you need to slip the flange into the pipe. You must also double-weld it from outside and inside to increase its durability and avoid leakage. It has a lower pressure tolerance than a regular or weld neck flange. Hence, it would help if you used these flanges in common pressure conditions.

 Unlike weld neck flanges, slip-on flanges are easy to install. Moreover, it can be readily welded into different pipes. The most significant advantage of slip-on flanges is they don’t need much longitudinal space to connect with the line or fittings. In addition, they are easy to align with the pipe tubes. Moreover, they come in larger diameters. In addition, there is no weld preparation required before connecting it with the pipe tubes.

There are many types of slip-on flanges available today. However, not every style is suitable for your industry. Hence, check the applicability and choose a slip-on flange based on the application.

Sumitec @2023