Slip on flange welding

Types of Slip On Flange Welding. The SO flange can be divided into SO welding plate flange and SO welding hubbed steel pipe flange. Its mechanical characteristics are between the integral flange and the looping flange.

The structure is simple, and the processing is convenient. So slip on flange welding is widely used in various fluid pipelines.

The inner bore of the slip on flange is a little larger than the pipe Oto make sure the pipe or fitting end can slip into the flange. The slip on flange is fillet welded with the pipe or fitting,different with the butt welding method of weld neck flange , and the pipe no need to do the bevel enjust square end is ok for welding ,this is also different. Commonly,the slip on flange can be fillet welded with the pipe on the two sides. It can make sure the joint quality with the pipe.

The calculated strength from a Slip On flange under internal pressure is of the order of two-thirds that of Welding Neck flanges , and their life under fatigue is about one-third that of the latter. The connection with the pipe is done with fillet welds , as well at the outside as also at the inside of the flange. The bore size of a slip-on flange is larger than the outside diameter of the connecting pipe, as the pipe has to slide inside the flange to be connected by the execution of a fillet weld.

Slip-on flanges are also defined “Hubbed Flanges” and they are easy to recognize due to their slim and compact shape.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. How do you install slip on flange?

When do we use slip-on flange, a weld neck flange or a lap joint flange? Does ASME require weep hole for slip on flanges? Is welding neck flange and weld on the same?

When installe the pipe is nestled inside the socket of the flange and welded into place. The socket helps steady the pipe during the welding process, and add additional surface area for a successful weld. As gr2vessels points out, the straight land on butt welding elbows and tees is not long enough to permit proper insertion into a slip - on flange at most sizes if you want the flange to end up normal to the axis of the fitting.

Slip on flange also named 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. The use of slip - on flanges should be be avoided where many large temperatures cycles are expected particularly if the flanges are not insulated.

Because your process in Thermal the pipe should be welded internal also. The OD of slip on flange is also welded on the back side of the flange. If lap joint flanges are the flanges called for by the line class then you may only use lap joint flanges.

For other line classes you would normally use only weld neck flanges for all flange situations for 3” (NPS) and larger. The use of a slip-on flange could be an exception here only when there is a space limitation problem. This allows for a fillet weld inside the SO flange equal to the thickness of the pipe wall without doing any damage to the flange face. Choose from our selection of weld - on flanges , including over 7products in a wide range of styles and sizes.

In stock and ready to ship. Pipe Flanges and Flanged Fittings for size NPS ½” to 24”.