butt weld fitting

Butt Weld Fittings

Butt weld fittings play a crucial role in piping systems by facilitating seamless connections between pipes or tubes. Unlike threaded or socket weld fittings, they are welded directly to the pipe end, ensuring a robust and leak-proof joint. Commonly used in industrial settings, such as oil and gas, chemical processing, and power generation, butt weld fittings come in diverse shapes and sizes to accommodate various requirements. Their design minimizes turbulence and pressure drop, enhancing the efficiency of fluid transportation systems. They offer reliability, structural integrity, and ease of installation, making them indispensable components in piping and fabrication projects.


 What are Butt Weld Fittings?


Butt weld fittings are weldable pipe fittings that allow you to change the flow direction, branch off, reduce pipe size, or attach auxiliary equipment. Furthermore, butt weld fittings made of forged steel are manufactured in accordance with ANSI / ASME B16.9. Butt weld fittings are the most common type of welded pipe fitting, and their nominal pipe size and pipe schedule are specified. Besides that, butt weld fittings begin with seamless or welded pipe and are formed (via multiple processes) into the shapes of elbows, tees, and reducers, among other things. Butt weld fittings are more common in stainless steel because of the cost savings.

Also, butt weld fittings are known as welded pipe fittings. These fittings can provide certain advantages over socket weld and threaded fittings while using in stainless steel and carbon steel. Whereas socket weld fittings are only available up to a certain size, butt weld fittings are available in sizes ranging from 1/2 inch to 72 inch.


Types of Butt Weld Fittings

Butt weld 45° Elbow Fittings

45-degree elbow with a long radius (1.5 x Diameter) and a 45 degree change in fluid direction.

Butt weld 45 degree elbow
Butt weld 45° Elbow
Butt weld 90° Elbow Fittings

90-degree steel pipe elbow with long radius (1.5 x Diameter).

Butt Weld 90 Degree Elbow
Butt Weld 90 Degree Elbow
Butt weld 180° return bend Fittings

More than a 90-degree elbow is referred to as a steel bend. For example, long radius and short radius 180-degree bends.

Other than that, butt weld elbow dimensions can be specified as diameter (in NPS) and thickness (in schedule 40 or schedule 80) according to ANSI. For instance, long radius 90-degree elbow 4 inch and thickness in schedule 40 or schedule 80.

Butt weld 180° return bend
Butt weld 180° return bend
Butt Weld Tee Fittings

The vacuum tubing on all three ports of butt weld tee fittings is the same diameter. Hence, tees are commonly used in vacuum piping systems to provide a 90-degree branch.

Butt weld tee
Butt weld tee
Butt Weld Reducer Fittings

Reducer is a pipeline component. It can reduce the size of the pipeline from large to small bore based on the inner diameter. Therefore, the length of the reduction is equal to the average of the smaller and larger pipe diameters. Moreover, you can also use the reducer as a diffuser or nozzle in this case.

Butt weld Reducer
Butt weld Reducer
Butt Weld Cap Fittings

To close off the end of a pipe, a cap will be applied. Hence, the end caps are used to seal or block off the end of a pipeline. Also, the end cap is welded to the relevant sized pipe within the pipeline that requires blocking off or sealing at the weld prep. Unlike a blind flange, which can be unbolted to allow access to the pipeline, the end cap is permanently attached once installed.

Butt weld cap
Butt weld cap

How are Butt Weld Fittings Made?


Hot forming would be used to create this type of pipe fitting. By that, it would entail bending the pipe and shaping it into a shape. After that, the manufacturer will cut the pipe to length and that pipe will be the starting material of this fitting. Then, this pipe would be heated and moulded into specific shapes using dies. Also, the heat treatment would be performed to achieve the desired mechanical properties and remove residual stresses.

The Advantages of Butt Weld Fittings

  • Inexpensive and simple to use.
  • It can reduce corrosion action and frictional resistance.
  • Welded joints offer more design flexibility and take up less space.
  • It is usually permanently leakproof for a welding fitting connection.
  • Butt weld fittings are continuous metal structure that connects a pipe and a fitting and has a high strength performance in a piping system.
  • The connection has a smooth inner surface and changes direction gradually. The pressure losses and turbulence for fluid transport will then be reduced.


What is the Difference Between Short Radius (SR) and Long Radius (LR)?


The terms SR45 elbow and LR45 elbow are frequently used. And the 45 or 90 refers to the bend angle for buttweld fitting to change the flow direction. Apart from that, a long radius elbow (LR 90 Elbow or LR 45 Elbow) has a pipe bend that is 1.5 times the pipe size. As a result, a 6-inch LR 90 has a bending radius that is 1.5 times the nominal pipe size. Also, a short radius elbow (SR45 or SR90) has a pipe bend equal to the size of the fitting. So, a 6″ SR 45 has a bending radius equal to the nominal pipe size of 6″.

Product Tags

Fittings forged fittings butt weld fittings Elbow Fittings Tee Fittings Nipple Fittings Plug Fittings Coupling Fittings Cap Fittings Bushing Fittings Union Fittings Cross Fittings Branch Fittings 45 Degree Threaded Fittings 90 Degree Threaded Fittings 45 Degree Socket Weld Fittings 90 Degree Socket Weld Fittings Equal Tee Fittings Reducing Tee Fittings Threaded Tee Fittings Socket Tee Fittings Hex Head Nipple Fittings Hex Fittings Reducing Nipple Fittings Hex Head plug Fittings Round Head Plug Fittings Square Head Plug Fittings Full Coupling Fittings Half Coupling Fittings Reducing Coupling Fittings Threaded Coupling Fittings Socket Weld Coupling Fittings Threaded Cap Fittings Socket Weld Cap Fittings Hexagon Bushing Fittings Reducing Bushing Fittings Flush Bushing Fittings Threaded Union Fittings Socket Weld Union Fittings Threaded Cross Fittings Socket Weld Cross Fittings Reinforced Socket Branch Outlet Fittings Reinforced Threaded Branch Outlet Fittings Reinforced Elbow Branch Outlet Fittings Reinforced Welding Branch Outlet Fittings Reinforced Flange Branch Outlet Fittings Reinforced Nipple Branch Outlet Fittings 1/4” Fittings 3/8” Fittings 1/2” Fittings 1” Fittings 1-1/4” Fittings 1-1/2” Fittings 2” Fittings 2-1/2” Fittings 3” Fittings 4” Fittings 8mm Fittings 10mm Fittings 15mm Fittings 20mm Fittings 25mm Fittings 32mm Fittings 40mm Fittings 50mm Fittings 65mm Fittings 80mm Fittings 100mm Fittings ASME 16.11 Fittings ASME BS3799 Fittings ASME BS1740 Fittings ASME MSS SP-83 Fittings ASME SP95 Fittings ASME SP97 Fittings ANSI 16.11 Fittings ANSI BS3799 Fittings ANSI BS1740 Fittings ANSI MSS SP-83 Fittings ANSI SP95 Fittings ANSI SP97 Fittings 3000# Fittings 6000# Fittings 9000# Fittings NPT Fittings NPT ASME B120-1 Fittings NPT ANSI B120-1 Fittings BSP Fittings BSPT Fittings Carbon Steel Fittings High Yield Carbon Steel Fittings Low Temp Carbon Steel Fittings Chrome Moly Fittings Stainless Steel Fittings Duplex Fittings Super Duplex Fittings Nickel Alloy Fittings ASME Fittings ASTM Fittings SA/A105N Fittings ASTM A694 F42 Fittings ASTM A694 F46 Fittings ASTM A694 F52 Fittings ASTM A694 F60 Fittings ASTM A694 F65 Fittings ASTM A694 F70 Fittings ASME SA/A350 LF1 Fittings ASME SA/A350 LF2 Fittings ASME SA/A350 LF3 Fittings ASME SA/A350 LF6 Fittings ASTM SA/A350 LF1 Fittings ASTM SA/A350 LF2 Fittings ASTM SA/A350 LF3 Fittings ASTM SA/A350 LF6 Fittings ASME SA/A182 F2 Fittings ASME SA/A182 F5 Fittings ASME SA/A182 F9 Fittings ASME SA/A182 F11 Fittings ASME SA/A182 F12 Fittings ASME SA/A182 F22 Fittings ASME SA/A182 F91 Fittings ASTM SA/A182 F2 Fittings ASTM SA/A182 F5 Fittings ASTM SA/A182 F9 Fittings ASTM SA/A182 F11 Fittings ASTM SA/A182 F12 Fittings ASTM SA/A182 F22 Fittings ASTM SA/A182 F91 Fittings ASME SA/A182F304 Fittings ASME SA/A182F304L Fittings

Types of Butt Weld Fittings Types


Elbow Fittings

Long, Short Radius, 3D

45 Degrees, 90 Degress & 180 Degrees

Reducer Fittings

Concentric & Eccentric

Tee Fittings

Equal & Reducing

End Cap Fittings


Size Range

1/2" (15mm), 3/4" (20mm), 1"(25mm), 1-1/4" (32mm), 1-1/2" (40mm),

2" (50mm), 2-1/2" (65mm), 3" (80mm), 3-1/2" (90mm), 4" (100mm), 5"(125mm), 6" (150mm), 8" (200mm), 10" (250mm), 12" (300mm), 14" (350mm),

16" (400mm), 18" (450mm),  20" (500mm), 22" (550mm), 24" (600mm),

26" (650mm), 28" (700mm), 30" (750mm), 32" (800mm), 34" (850mm),

36" (900mm), 48" (1200mm)

Wall Thickness

SCH 10, SCH 20, SCH 30, SCH 40, SCH 60, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160


SCH 10s, SCH 40s, SCH 80s


ASME B16.9, ASME B16.28, MSS SP-75


Carbon Steel


High Yield Carbon Steel

ASTM A860 WPHY 42/ 46/ 52/ 60/ 65/ 70

Low Temp Carbon Steel


Chrome Moly

ASME/ASTM SA/A234-WP5, WP9, WP11, WP12, WP22, WP91

Stainless Steel

ASME/ASTM SA/A403WP 304/304L, 316/316L, 309, 304H, 310S, 317, 321, 321H, 347, 347H, 904L

Duplex/ Super Duplex

UNS S31803 / S32205 / S32750 / S32760

Nickel Alloy

UNS N02200 (Nickel 200), UNS N02201 (Nickle 201)
UNS N04400 (Monel 400),), UNS N06600 (Inconel 600)
UNS N06601 (Inconel 601), UNS N06625 (Inconel 625)
UNS N08810 (Incoloy 800H), UNS N08811 (Incoloy 800HT)
UNS N08825 (Inconel 825), UNS N010276 (Hastelloy C276)


HIC, PED 2014/68/EU, NACE MR0175, NORSOK available

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