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A slip-on flange is connected to the pipe or the fittings by two fillet welds, one executed inside and one outside the cavity of the flange. Slip-on flanges are also defined "Hubbed Flanges" and they are easy to recognize due to their slim and compact shape.
Main features
Design
The diameter of the slip-on flange is slightly larger than the pipe to which it is connected.
They have a convex surface (RF) or a flat surface (FF) to provide a sealing surface when fitted with another flange.
Installation
The installation process involves sliding the flange onto the pipe and then welding it into place on the back and outside of the flange.
Because of the ease of calibration, slide sleeve flanges are commonly used in systems that do not require frequent removal.
Advantages
Easy to calibrate and install, cost effective.
They provide a smooth inner bore transition from the pipe to the flange, reducing turbulence and pressure drop in the pipe.
Applications
Slip-on flanges are usually used in systems with low pressure and temperature conditions.
They are often used where pipes need to be easily aligned and disassembled infrequently.
Slip-on flanges are not suitable for systems under high pressure or high temperature conditions, as welding may not provide sufficient strength.
In critical applications where joint strength is required, other types of flanges can be selected, such as welded neck flanges or socket flanges.
Industry standards and specifications must be followed when selecting and installing slip-on flanges to ensure the integrity and safety of piping systems. The choice of flange type depends on factors such as pressure, temperature and material compatibility of the system used.
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