Introduction to socket weld flange

Socket welded flange (SW Flange) is a popular type of pipe flange originally developed for small-size high pressure piping.Socket welded flanges are made similar to slip on flanges.However, the socket welded flange of the inner pocket allows for a smooth hole and better fluid flow.During internal welding, the static strength of the flange is equal to that of the slip on flange, but the fatigue strength is 50% higher than that of the double welded lap flange.

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.

ANSI B16.5 socket welding flanges

ANSI B16.5 socket welding flanges

Key features for socket weld flange:

  • 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.

Hebei Haihao Group,as one of the earliest flange manufacture,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.Obtaining from the clients and end user all over the world,we have clients such as National Chemical Engineering Corporation,CNPC and SINOPEC and so on.

For any flanges you need,please feel free to contact us