Socket Weld Fitting

SN Valve is a leading China socket weld fitting manufacturer. A socket weld fitting is a type of pipe attachment detail where the pipe is inserted into a recessed area of a fitting, valve, or flange. To join the pipes or valves to other sections of the pipe, fillet-type seal welds are applied. Socket weld fittings are a good choice in certain cases due to their advantages of strong structural strength and high leakage integrity. These factors are important considerations when designing a pipeline project.

As below picture you can see the shape of 90 degree of socket weld elbow:

How to describe socket weld pipe fittings dimensions correctly

When placing a request for socket weld fittings, it is important to specify the OD (outside diameter) dimensions and the pressure requirements (or thickness schedule). Socket weld fittings have pressure ratings that are typically expressed in class 3000, class 6000, and class 9000.

Socket weld pipe fittings are usually simplified as SW pipe fittings, so you will see some descriptions like SW elbow, SW tees, SW couplings etc.

Usage about socket weld fittings

Due to their high-pressure capabilities, socket weld fittings are commonly used in a wide range of industrial processes.

● Socket weld pipe fittings, such as elbows, tees, and reducers, can be used in pipelines to convey toxic, flammable, or expensive materials where leakage is not acceptable.

● Used in conjunction with ASME pipes to facilitate changes in dimensions.

● Applied in situations where the pipe work is considered to be permanent. They are designed in a way that provides good flow characteristics.

● Manufactured in accordance with ASTM A234 standards and can also confirm to ASME B16.11. This is a standard that covers dimensions, pressure-temperature ratings, marking, tolerances, and requirements for materials for carbon steel and forged carbon. In terms of acceptable material forms, they include bars, forgings, seamless tubes, and seamless pipes which conform to the requirements of fittings chemicals, mechanical property, and practices.

Types and Shapes

Socket weld fittings come in a variety of shapes and types, including but not limited to elbows, tees, crosses, and caps. These fittings are typically used to change the direction of a pipe, branch or close off the end of a pipe.

Materials and Manufacturing

The material of socket weld fittings is usually matched to the material of the piping system to ensure compatibility and corrosion resistance of the connection. Common materials include carbon steel, stainless steel, and alloy steel. During the manufacturing process, fittings are forged, cast or machined to meet different size and shape requirements.

Connection and sealing

Socket weld fittings are connected by socket welding. During the joining process, one end of the pipe is inserted into the socket of the fitting and the two are securely joined together by welding. In order to ensure a tight connection, the pipe and the socket of the fitting are usually cleaned and pre-treated before welding, and appropriate welding methods and materials are used during the welding process.

Characteristics and applications

Socket weld fittings have the following characteristics:

●Strong connection: connected by welding, with high connection strength and sealing.

●Strong adaptability: can be used in various sizes and shapes of piping systems.

●Resistant to high temperature and high pressure: able to withstand high temperature and pressure.

●Easy to install and maintain: compared with other connection methods, socket weld fittings are easier to install and maintain.

●Socket weld fittings are widely used in various industrial fields, such as petroleum, chemical industry, electric power, shipbuilding and so on. In these fields, they are usually used to connect pipelines, valves, flanges and other equipment to ensure the normal operation and safety of the pipeline system.