The calculated strength from Slip On flanges under internal pressure is two-thirds that of Welding Neck Flanges, and their life under fatigue is about one-third that of Welding Neck Flanges.

The connection on Slip on Flange is done with two fillet welds, one on the outside and the other on the inside of the flange.

After sliding the flange on the pipe, the distance inside the flange between the end of pipe and the flange face should be: Wall thickness of pipe + 3 mm (1/64 inch). This space is necessary to prevent damage to flange face during the welding process.

All Domestic Steel Pipe Slip on Flanges are made with material forged and machined in USA.

Size & Dimension table for Flanges

A105 - The standard forged carbon steel piping components for ambient and high temperature / pressure systems

SS304 - A common standard for stainless steel due to its malleability, high corrosive resistance weld-ability  

SS316 - A molybdenum stainless steel that provides excellent tensile, creep and stress-rupture strengths at elevated temperatures

Material Description for Flanges

This is a slip on flange, and this is a 2 inch flange, 150 pound. All flanges that we are showing you today for the purpose of this video is 150 pound flanges. 2 inch flange, this is a 2 inch pipe sample and you see the slip on flange is the easiest one, you just slide it on and then you weld it. This is a raised face flange. The raised face flange, on the backside of the flange, right here you can see, that had a lip, a 1/16 inch lip. This is also a slip on flange, but this is a flat face, and we’re showing you as an example, that this does not have a raised face; this is a flat faced flange.

This is a slip on flange, and this is a 2 inch flange, 150 pound. All flanges that we are showing you today for the purpose of this video is 150 pound flanges. 2 inch flange, this is a 2 inch pipe sample and you see the slip on flange is the easiest one, you just slide it on and then you weld it. This is a raised face flange. The raised face flange, on the backside of the flange, right here you can see, that had a lip, a 1/16 inch lip. This is also a slip on flange, but this is a flat face, and we’re showing you as an example, that this does not have a raised face; this is a flat faced flange.