Socket welding refers to a pipe connection method in which pipes are inserted into the embedded wall of valves, pipe fittings or flanges. Compared with butt welding, socket welding is usually used for small diameter pipes of 2 inches and below

fillet weld shall be adopted for socket weld. When high structural strength requirements and high leakage risk become design considerations, socket welded joints are a better choice

socket welded joints have excellent performance and lower strength than butt welded joints because of the use of fillet welds and the steep change of geometry. However, socket welded joints are still superior to other mechanical joints

socket welded pipe fittings are a group of high-pressure pipe fittings used in various industrial production processes. It is characterized by:

1) it is used to transport leakage free flammable media, toxic or expensive media and 300 psi to 600 psi steam

2) it is only connected with ASME pipe with the same diameter

3) it is used for long-term operation of pipeline and provides better flow characteristics

4) its material is ASTM and its manufacturing standard is ASME B16.11. B16.11 covers pressure temperature ratings, dimensions, tolerances, identification and material requirements for carbon steel, stainless steel and alloy steel. The materials that can be selected are forgings, round bars and seamless pipes. Common materials are ASTM A105, A182 or A350

5) socket welded pipe fittings have three pressure grades: class3000, 6000 and 9000