Stainless Steel Slip On Flange SO ASTM A182 ASME / ANSI B16.5 Class150 to 1500

Slip on flange also simplified as SO flange. SO flanges slip over pipes and are designed to bit slightly bigger on the inside than the pipe. They connect to the pipe through a fillet weld at the flange top and bottom. It is used to insert the pipe into the inner hole of flange, as the flange inner diameter is little bigger than the pipe’s outer diameter, pipe and flange could be connected by lap welding at the top and bottom of the flange.

The slip on flange is shorter in length than a weld neck flange, and is used in areas where short tie-ins are necessary or space limitations necessitate its use. Generally, the life span of a slip-on flange connection is about one-third that of the weld neck flange. Despite of additional welding involved during installation, its lower initial cost makes the SO flange preferred over WN flanges by many users. It is generally used in non-corrosive, non-critical, moderate pressure services. Slip on flanges of Class 150 and Class 300 are most commonly seen in utility engineering.

Product Information

Advantages of the Slip On Flange

· Installation costs are lower

· Less time is spent on accurately cutting the pipe

· Easier alignment

· Low hub on slip-on flanges due to pipe slips in the flange

· Interior and outer welding of flange

· Leak prevention

Slip On Flange vs Weld Neck Flange

Slip On flange (SO flanges) are typically cheaper than Weld-Beck Flanges, which is why many customers tend to choose them. It is one of the common used flange for the low pressure, medium temperature pipeline systems.

On the other hand, as the flange bore is bigger than pipeline diameter, it usually requires more welding work than the other flanges, moreover as the durability is not expected as longer as Welding Neck Flange, so all these factors shall be considered before choose a slip on flange.