The most common types of pipe fittings are threaded fittings, socket welded fittings, and buttweld fittings, of which the threaded fittings are the most popular. There are several advantages to both of these types of fittings. However, this blog will focus on the advantages of buttweld fittings and their application in particular.

It is necessary to use pipe fittings in pipelines in order to allow the following to take place:

  • Changing the direction in which liquid flows through pipes.
  • Liquid flows in two directions through the branching of the pipe.
  • The diameter of the pipe is reduced.
  • Auxiliary equipment is attached.
  • The pipeline has reached its end.

 Special Piping Materials offers buttweld fittings that are designed and constructed in accordance with the ASME standards for buttweld fittings. Many different materials are available for the manufacture of these fasteners, for example, superduplex, nickel alloys, stainless steels, duplexes, 6% molybdenum alloys, as well as 5% molybdenum alloys.

Buttweld fittings


Hot or cold forming is the process of manufacturing a buttweld fitting by bending and molding it into the desired shape. Heat treatment is also used to remove any residual stresses and to achieve specific mechanical properties, as well as to remove residual stresses.

Buttweld fittings have to have the ends of their end caps beveled, and the exact shape of the bevel depends largely on the wall thickness of the pipe to which the fitting is being attached. There is a wide range of exotic materials that can be used for buttweld fittings, such as super duplex material, nickel alloy material, and even 6% molybdenum material. There is a good chance that the material of the fitting will be the same as the pipe system that it will be attached to, in the majority of cases.

There are several types of buttweld fittings defined in the ASME B16.9 standards, including corrosion-resistant buttweld fittings that conform to MSS SP43 specifications that are designed to be light-weight.

These valuable fittings are available in many different shapes, dependent on the intended purpose:

  • Pipelines are altered using ‘elbows’.
  • Pipe bore sizes can be reduced or increased by using ‘reducers’.
  • Multiple ways are available for splitting the flow in the pipe with ‘Tees’ or ‘Crosses’.
  • When pipelines need to be closed, ‘caps’ are used.

Types of ButtWeld Pipe Fittings 

  1. Pipe Elbows – Pipe elbows allow a change in direction between two lengths of pipe or tube, usually done with carbon steel elbows with connection ends.
  2. Pipe Bending – Materials used for pipe bends include carbon steel, alloy steel, stainless steel, low-temperature steel, and high-performance steel.
  3. Pipe Tees – Our seamless tube tees and welding tube tees, as well as straight tees and reducing tees, can be supplied. The inlet and outlet sizes of pipe tees are usually the same.
  4. Pipe Cross – Fitting with four openings exactly opposite one another, on the same side. In pipe fittings, a pipe cross is used. A four-pipe junction requires it. One inlet can be connected to three outlets, or three inlets can be connected to one outlet.
  5. End Caps – Plastic End Caps, Stainless Steel End Caps, ASTM, DIN, ANSI, ISO, JIS and ISO Standards, 1/2 to 56 Inches. Different types of pipe caps are available, such as carbon steel caps, stainless steel caps, and alloy steel caps. 
  6. Pipe Reducer – Pipe reducers provide flexibility in connecting fractional tubes in a wide variety of applications by providing a tight connection.
  7. Stub End – A Stub End is a fitting used to replace welded flanges in applications requiring rotating backup flanges. Lap Joints and Vanstone Flared Laps are also called lap joints. Stub End back surfaces are seated against a rotating backup flange. 
  8. Coupling Fittings – Coupling fittings are used for fluid conduits in which each end portion of two tubes to be connected is provided with a swaged-on adapter that can be used to connect or disconnect the tubes without disturbing it.


Many industries use buttweld fittings for altering, dividing, and terminating fluid flow. The following types of processes are used in these facilities: waste treatment, chemical processing, breweries, petrochemical plants, cryogenic plants, paper production, gas processing, and even nuclear power plants. It is clear from this wide variety of applications how robust a buttweld fitting is and how highly regarded it is.


It is possible to use buttweld pipe fitting in very harsh environments. They can withstand high pressures and temperatures. No matter what industry it is required for, they are generally considered the most robust welding fixtures. It takes a skilled installer to weld them correctly on site, however, and they do take some time to install.

  • Welded connections provide stronger, more robust, and leak-proof piping connections.
  • In addition to providing added strength to the overall piping system, the continuous metal structure enhances its durability.
  • As the inner surface and directional changes are smooth, turbulence and pressure drops are minimized.
  • By manufacturing Short Radius Fittings, Long Radius Fittings, and 3R Elbows, we provide the option of various different turn radiuses.
  • As compared to threaded or socket weld counterparts, they are more cost-effective.
  • Purchased and deployed cost-effectively, they have a long service life.
  • In comparison to socket welds and threaded fittings, butt weld pipe fittings are better at resisting corrosion and erosion.
  • The welded system occupies a relatively small amount of space in comparison to the other options.

Special Piping Materials supply of Buttweld Fittings

Our team at Special Piping Materials has built a vast network of long-term relationships with a number of manufacturers and mills that provide the highest quality buttweld fittings. Various sizes and materials are available for our fixtures.

In order to ensure the quality of our products, we test them to international standards. We have offices all over the world where our sales team can assist you.


 What is a weld fitting?

Socket Welds are important pipe attachment details that allow a pipe to be attached to a valve, fitting or flange. As opposed to buttweld fittings, socket weld fittings are used primarily for small pipes (Small Bore Piping); usually for piping with nominal diameters under NPS 2.

 What is the importance of fittings?

It Provides water supply from main pipes to subsidiary pipes. Proper fitting also prevents leaks in the plumbing lines. It is essential to have fittings for pipes in a plumbing system.

 What is buttweld pipe fittings?

We also offer buttweld pipe fittings, as well as long radius elbows, concentric reducers, eccentric reducers, and Tees. Stainless steel or carbon steel buttweld fittings are essential when changing directions, branching off, or mechanically joining equipment to piping systems.

 How are Buttweld fittings made?

The elbows, tees, and reducers of buttweld fittings are formed (through multiple processes) from the seamless or welded pipe. Butt weld pipe fittings are sold in the same manner as pipe from Schedule 10 to Schedule 160.

How are socket welds and buttwelds different?

It is not necessary to bevel the ends of the pipe or prepare the materials for socket welds other than to ensure they are clean. During the welding process, the fittings must have the same thickness as the pipes.

Buttweld flanges: what are they?

 There are many types and models of Butt Weld flanges, which are used to connect flanges and pipes. In terms of service and performance, they are primarily used in welding technology.

Steel fittings are made in what way?

As a result of forging steel into fittings, a very strong and durable fitting is created. As soon as the carbon steel is heated to molten temperatures, it is placed in dies and allowed to cool down. As soon as the steel has been heated, it is then forged into the fittings made from forged steel. Products made from high-strength forged steel are extremely durable and resistant to the effects of the weather.

An eccentric reducer serves what purpose?

The eccentric reducer is used when it is necessary to keep the top or bottom level of pipes at the same level. When both air and liquids are flowing in a system simultaneously, eccentric reducers are often used to avoid trapping air within the system, so they are often used where both air and liquids are traveling at the same time

How does 5G fit into the picture?

A 5G welding position is also referred to as a horizontal or X-axis position in which the pipe is in the horizontal or X-axis position, but cannot be rotated or moved due to its position. In order to do the welding, the welder moves it around the pipe while performing the welding. There is almost no difference between this situation and the 1G scenario; only the pipe cannot be rotated.

Which welding type is the strongest?

Since TIG welding produces extreme heat, it produces high tensile strength and ductility due to its slow cooling rate. The MIG weld can also be considered to be one of the strongest types of welding because it can create a joint that is extremely durable.

Special Piping Materials supply of Buttweld Fittings

Our team at Special Piping Materials has built a vast network of long-term relationships with a number of manufacturers and mills that provide the highest quality buttweld fittings. Various sizes and materials are available for our fixtures.

In order to ensure the quality of our products, we test them to international standards. We have offices all over the world where our sales team can assist you.

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