What is a socket welding flange (SW flange)?

Socket welding flange,a popular type of pipe flange.It is like a slip on flange and used specially for small sizes piping systems.The shape of a socket welding flange is like a slip on flange with a block in the inner bore of the flange which name is socket.And the socket thickness is common same with the pipe thickness.However,the internal pocket of a socket weld flange allows for a smooth bore and better fluid flow.When provided with an internal weld,the static strength of this flange is equal to slip-on flange,but the fatigue strength is 50% greater than double welding slip-on flanges.

socket weld flange pipe connection design

Smooth bore conditions in such a flange can easily be attained without having to bevel the flange face and,after welding,to reface the socket weld flange as would be required with slip-on flanges.For this reason,the internally welded flange is popular in chemical process piping.

The main features of the socket welding flange are as follows:

The recess on the inside diameter of the socket weld flange allows for a good fit of the pipe allowing for a smooth flow of liquid.

Socket welding flanges work well for smaller sizes and higher pressure temperature conditions.

They are similar to slip-on flanges,but must specify the schedule of the pipe where they will be used for with socket welds.

socket weld flange production in Haihao Flange Factory

Hebei Haihao Group,as one of the earliest flange manufacture in China,has strong experience in flange production and inspection and a complete set of equipments,including advanced cutting,forging,machining,drilling machines and professional testing and inspection instrument.

For any flanges you need,please feel free to contact us,email:sales@haihaogroup.com