Socket Weld Fittings

Socket Weld Fittings


Fittings are adapters or components which are utilized to join different items together in various systems. There are many fittings that connect different types of modules together. Some are designed to change the flow of fluid while others are used to cut the flow in different systems. They are available in different shapes and sizes and can be used in all types of pipes, tubes, valves, etc.

A socket weld fitting is an installment that is fitted between a recessed area of a pipe or a flange. They are produced by shaping blocks of steel and machining them till the perfect size is obtained. It possesses superior corrosion and erosion resistance properties. These items are widely utilized in various high-temperature applications. The pressure rating of these modules is between the classes of 3000, 6000, and 9000. The range of items are widely used in areas where the piping network is permanent and doesn’t require frequent repairs. They are frequently used with ASME pipes if they are available in the same size range.

Size 1/8" to 4" NB
Class 2000 to 9000 LBS
Standard ANSI/ ASME B16.11

They are based on different material type’s namely stainless, carbon and alloy steel components. Depending on their applications, they can be availed in tees, elbows, reducers, couplings, etc. These leak-proof components are utilized to transport toxic and inflammable fluids and gases over long distances.

The attachment is made of a fillet weld which enables it to be utilized for high-pressure pipes of small sizes. This weld allows it to be installed to the apparatus easily. These modules don’t require the pipes to be beveled and prepared for welding. They don’t require additional alignment tack welding as the fitting fixes the trajectory. The items in this range are produced in accordance with several ASTM standards and produced following ASME B16.11. standard which covers different pressure ratings. The components produced from this weld are susceptible to crevice corrosion. They can easily corrode if the interior region of the pipe is not smooth.

Do S/W material have a schedule?

Yes, they come in a different range of schedules. Each schedule helps in describing the wall thickness of the item. The fittings within this range are available in pressures classes of 3000 pounds which is roughly sch 80. The pressure class of 6000 can be termed as an sch 160 while, 9000 rating is the highest schedule within these elements. They can be availed in sizes between ½ inch to 4 inches of nominal size.

What is the minimum gap allowed for a S/W fitting?

The minimum gap accepted by ASME standards is 1/16th of the weld. This ensures that the weld is not fully cracked. A gap in this fitting is very essential as the pipe size may exceed due to thermal expansion which, may, in turn, crack the fillet weld. During the fabrication process, if the pipe wall is thinner than the fitting, the pipe will become hotter during welding if there is no gap. If the pressure is increased in the system and the pipe has no gap, it will hamper it in the long run.

How does a S/W union work?

A union is a connection that can easily connect itself to pipes and later be detached without causing any deformation or damage to the line. A socket weld union is made up of 3 pieces of items that are interconnected. This includes two internal pieces and a centerpiece that comes together when the module is rotated. The unions are tightly screwed before they are welded in place. This invariably helps reduce the warping of the seats.

Is a socket weld a fillet weld?

Yes, it utilizes fillet weld to join the pieces of metal together. This weld helps join two pieces of metal when they are at an angle or are perpendicular. It requires less preparation and is very cost-effective. This means many welders utilize this technique in fabricating different parts within the steel and metal industry.