Schedule Thickness
Schedule thickness in SAE Flange is the generalized number used to denote the thickness of the SAE Flange. The number explains the thickness of the wall of the SAE Flange. Schedule thickness number relates with the wall thickness, i.e an increase in the schedule number written on the flange also denotes an increase in the wall thickness of the tool. Flanges are alternative connecting tools for pipes, tubes, and hoses. Schedule thickness in SAE Flange is very important during installation as it helps the operator determine the suitability of the SAE Flange for the application intended.
1. What is Schedule Thickness in SAE Flange?
SAE Flanges are used in the connection of tubes, hoses, and pipes and are widely used due to their suitability with high-pressure applications. Just like other equipment being used daily, SAE Flanges and pipes generally have a number inscribed on the body. This number is known as the schedule number and it is used to determine the thickness of the wall of the flange or pipe. Choosing the flange with the right schedule number is one of the most important factors to consider before selecting the right flange to buy. There are some other factors being considered are pressure ratings, chemical compatibility, temperature, flange size, costs, etc.
2. How can you determine the Schedule Thickness of an SAE Flange?
*** OD: Outer Diameter
*** ID: Inner Diameter
Schedule thickness for an SAE Flange can be calculated, however, to save yourself a lot of stress, refer to the table below to find the dimensions for the SAE Flange type. The first table shows the flange dimensions for different sizes with its schedule thickness.
When using the flange with a specified dimension, a corresponding pipe dimension is recommended. The table below shows the corresponding pipe outer diameter and pipe schedule thickness given their nominal sizes.
3. Why does the schedule SAE Flange have a bevel end of 30 degrees?
The SAE flange normally comes with a 30 degree bevel end. The primary reason for this is to allow for better butt welding. A flange with good welding is less likely to experience leakage, deformation, or failure. The welding region typically has flexible elastic and rigid requirements so that during welding, the joint is not affected by the fluctuating temperature and high pressure.
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At 30 degrees, a perfect welding arc can be formed so that the surface is flushed perfectly with the surface of the flange and for completely sealing the pipe assembly. This explains why welded flanges are most commonly used and why a 30 degree opening is left at the bevel of the SAE flange.​