316L Stainless Steel Socket Weld Flange Introduction

Socket Weld Flanges are flanges that are welded at the end and outside of the pipe by inserting the end of the pipe into the step of the flange ring. There are necked and non-necked. The necked pipe flange has good rigidity, small welding deformation and good sealing property.

Socket welding is a method of pipe connection in which pipes are welded into the walls of valves, fittings or flanges. Socket welding is generally used for small-bore pipes 2 inches and below, as opposed to butt welding. Fillet weld is used for socket welding. Socket welded joints are a good choice when high structural strength requirements and high risk of leakage are design considerations. The fatigue strength of socket welds is lower than that of butt welds due to the steep change in fillet weld and geometry. However, socket welds are still superior to other mechanical joints.

Structural Drawing of Socket Weld Flange

Drawing of Pipeline and Flange Connection 

Sealing Surface Form:

• Raised Face

• Male Face

• Female Face

• Groove Face

• Ring Joint Face

Application Range:

• Boiler pressure vessel, petroleum, chemical, shipbuilding, pharmaceuticals, metallurgy, machinery, stamping elbow food and other industries. 

• It is commonly used in pipes with PN < 10.0MPa and DN < 40.

Advantages of Socket Weld Flange

1. Socket welded flange has the advantages of simple connection, high reliability and high strength of welding joint.

2. The socket-type structure is designed reasonably, which has certain displacement capability and can adapt to different angles of pipeline.

3. The socket structure has good sealing performance and can effectively prevent water leakage or leakage of pipeline.

4. The socket structure has certain impact resistance ability, which can effectively reduce the stress of pipeline and ensure the safe operation of pipeline.

Precautions of Welding Flanges

1. Before welding, surface treatment is required to clean the surface impurities, scale and oil stain of stainless steel flange to ensure welding quality.

2. Appropriate welding methods and materials are required to ensure welding quality and joint strength.

3. The welding temperature and time should be strictly controlled during the welding process to avoid the occurrence of over-heating and over-short time, which will affect the welding quality and joint strength.

4. Appearance inspection and pressure test are required after welding to ensure welding quality and joint sealing performance.

Chemical Composition of 316L

Mechanical Property of 316L

316L stainless steel offer better corrosion resistance due to their low carbon content. In addition to good corrosion resistance, 316L stainless steel also have good mechanical properties, including high strength and good high temperature ductility. Heat treatment can be carried out by conventional methods such as solution tempering, quenching tempering or complete quenching to produce hardened parts with high wear resistance.