Types of Steel Pipe Fittings and Their Application

The first step to choosing a steel pipe fitting like the one you’d use for an S355J2 is to know what type it is. There are a few different types, such as Socket weld, flange, and elbow. Then you should choose the appropriate material based on its type, whether you’re working with carbon steel, brass, or stainless steel. You should also know how to identify the different types of welding processes used to assemble pipe fittings.

Socket Weld

Socket welding of steel pipe fittings has many advantages. First of all, it allows pipe runs to change direction. A socket weld elbow makes this possible. The socket consists of two internal threads and a centerpiece that brings the two ends together during rotation. It must be tightly screwed into the pipe before welding to avoid seat warping. Socket weld elbows are available in a variety of shapes and sizes, including short-radius and long-radius. They are also used to change the direction of the flow of fluids.

The price of socket weld pipe fittings depends on the size, thickness, class, and material. This type of pipe fittings is ideal for high-pressure and leak-proof applications. Additionally, they are more reliable and sturdy than threaded fittings, which are difficult to clean. In addition, socket weld pipe fittings are easy to transport because they require no special machining for butt weld end preparation.

Unlike butt welding, socket welding is a permanent bond of the pipe and flange. Socket welding is easier to use than butt welding and allows 90-degree branch directions to be achieved. The socket-welded pipe connection is easier to work with in small pipelines, since the end of the pipe does not have to be beveled and simply slides into the joint’s socket. Socket welding also avoids weld protrusion. Additionally, socket weld pipe fittings do not require tack welding to align them.

Carbon Steel

High-yield carbon steel pipe fittings are ideal for a variety of applications. They can withstand high temperatures and pressures and form tight, leak-free joints. They also provide high resistance to corrosion and other harmful elements, which make them an excellent choice for systems that are subject to extreme pressure and hardness. These fittings are commonly used in a variety of applications, including pipelines for oil, gasoline, chemical, and hydraulic fluids.

The carbon content of steels determines their properties and use in manufacturing processes. Stainless steel is a hybrid material, combining the high-cost performance of corrosion-resistant alloy steel with the durability and strength of carbon steel. It has the same corrosion resistance as carbon steel while being 70-80% less expensive than stainless steel, which is used for marine applications. Both types of stainless steel pipe fittings have a similar service life, but the lower-chromium alloys have a shorter service life and high maintenance costs.

These steel pipe fittings are commonly used in the chemical and food industries. They are also used in water supply lines, pollution control systems, wastewater management systems, and nuclear power plants. They are also used to connect a variety of pipe lengths. The dimensions of carbon steel pipe fittings depend on the pipe’s nominal size. For example, a standard CSA-compliant pipe fitting is available in three different sizes: a straight, a round, and a square.

Stainless Steel

Stainless steel pipe fittings have several benefits that make them an excellent choice for many different applications. Stainless steel pipe fittings are available in a variety of materials and come with various pressure-temperature ratings. There are two types of stainless steel pipe fittings, threaded and welded. Threaded connections are the most common type, and are used for a variety of applications. Threaded connections are not recommended for applications where UltraHigh Hydrostatic pressure is present.

Stainless steel pipe fittings are widely used in the food processing industry and are also used in food conveyors. These fittings reduce the cost of transportation and don’t scale, which can reduce the health risks associated with food. Unlike other metals, stainless steel is virtually inert in long-term transportation. The smooth inner wall of stainless steel pipes prevents food from developing a harmful microbe-based coating.

Stainless steel pipe fittings are generally made of stainless steel and can be either straight or angled. The types of connections available are compression, union, elbow, push thread, and socket weld. Some pipe fittings can be combined with traditional connections to create one long pipeline. Depending on the application, a stainless steel pipe fitting may be a good option. SSP offers a full range of stainless steel pipe fittings, including SAE straight threaded fittings.


Among the many advantages of Brass pipe fittings is their corrosion resistance. The rmmcia family of brass pipe fittings includes a complete range of accessories including unions, changes of direction, branches, bushings, and seals. Because of their high resistance to corrosion, these fittings are commonly used for steel pipe connections. They are available in nickel-plated versions, which increase their resistance to corrosion and are easy to install.

Typical Applications of Brass pipe fittings include water, chemicals, and flammable gas. Brass pipe fittings can also be used in the transportation of hoses, fuel lines, and LP. These fittings can also be used in automotive and hydraulic systems. They also have special applications in ballcock adapters, compressors, and refrigerator coolers. When choosing brass pipe fittings, make sure that the materials are safe for your intended purpose.

Because of its versatility, brass is a popular material for plumbing fittings. Compared to other materials, brass is more malleable, which lowers labor costs and makes the fittings more durable. This makes brass a great choice for any waterworks system or plumbing project. Brass offers years of reliable service and is resistant to corrosion, which can damage appliances and cause floods. Therefore, you can rest assured that brass pipe fittings are made of high-quality materials for your plumbing projects.


Choosing the correct pipe fitting depends on several factors, including the material used and the intended use. Moreover, choosing the proper fitting will depend on the size and type of pipe that you’re connecting. Various features of the fitting include its OD and ID and whether it’s underground-rated. Choosing the correct pipe fitting is essential for a successful installation. This article outlines some of the most important factors to consider when choosing the right pipe fitting.

A few benefits of nylon steel pipe fittings are that they’re resistant to a broad range of chemicals, and can withstand working pressures up to 150 PSI. These features make them an excellent choice for use in flammable and acid-based fluids and chemicals. However, they shouldn’t be used with abrasives, acid-based fertilizers, chloride, sulfuric acid, or xylene. This is one of the most common pipe fitting materials, and it’s used for both supply and drainage.

Asymmetrical ferrules have different advantages. The first, symmetrical fittings have fewer connection points. The second, asymmetrical, fittings are less difficult to assemble. Asymmetrical ferrules are the most affordable. On the other hand, industrial-strength fittings are flash-welded at the seams. These two types of fittings differ in their OD and are useful for piping systems.


Steel pipe fittings can be made of a wide range of materials, including polypropylene. This material is lightweight and has an excellent strength-to-weight ratio, making it an attractive alternative to stainless steel. In addition to its lightweight, polypropylene offers good corrosion resistance and impressive durability. Some of the most common uses for polypropylene pipe fittings are in agricultural and industrial applications.

PP-R pipe is resistant to most chemicals and a wide range of temperatures. These properties are also what make PP-R pipe so popular in the HVAC and plumbing industries. Although PP-R pipe is resistant to fire and smoke, it must be protected from ultraviolet radiation, which can weaken the polypropylene chains over time. For this reason, manufacturers offer solutions that provide UV protection. While polypropylene pipe fittings don’t require thrust blocking, anchors may be required at the point where a buried pipe enters the building foundation, to minimize movement.

Polypropylene-R pipe is widely used in North America and Europe for a variety of applications. Its natural insulation properties reduce noise caused by water flow and water hammer, and its thermal fusing process creates strong bonds. These pipes also absorb shock from sudden pressure surges. Some manufacturers of polypropylene steel pipe fittings have developed proprietary PP-R materials for specific pipe applications. They also heat-stabilize the PP-R material, which makes it resistant to long-term exposure to temperatures and pressure.