ASME/ANSI B16.9 Buttweld Elbow

ASME B16.9 Elbow is a type of pipe fitting that is used to connect two pipes together to change the direction of the pipeline.
The different angles of the elbows are useful in getting the desired change of direction. There are different types in the shape of elbow shapes as well.
The 45-degree short Radius Elbow has a short radius, so the change of direction happens quickly. In contrast, the 90-degree long radius elbow takes more distance to complete the alteration in direction.
There are different radii of fittings depending on the diameter of the pipes.

ASME/ANSI B16.9 Elbow Specification：

Outside Diameter: Seamless Elbow ( 1/2″～24″) , ERW / Welded /Fabricated Elbow (1/2″～48″)

Wall Thickness: 3mm– 40mm / SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80,SCH120, SCH140, SCH160, XXS

Bending Radius: R=1D– 10D, 15D, 20D

Product’s Angle: 5°– 180° Elbows, 90° and 45° Long Radius Elbow, 180°Long Radius Returns, Short Radius Elbow and Returns

Production Grades: Stainless Steel, Alloy Steel, Duplex, Nickel Alloys, Low temperature Steel, Carbon Steel, Cupronickel

ASME B16.9 Buttweld Pipe Elbow Material Grades

Stainless Steel Elbow; ASTMA403 WP Gr. 304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L
Carbon Steel Elbow: ASTM A234 WPB, WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70.
Alloy Steel Elbow: ASTM/ ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91

Click here to get the difference about stainless steel elbow and carbon steel elbows.

Difference Between Short and Long Radius Elbows

Short Radius Elbow: is small in size, usually less than 1.5 times less than the usual piping diameter
Long Radius Elbow: is very durable and corrosion-resistant. Here, the elbow curvature is around 1.5 times the nominal diameter.

More difference Between Long Radius Elbow And Short Radius Elbow, please click here.

Applications

• Oil & Gas Pipelines
• Petrochemical Plants
• Water Supply Systems
• Power Generation Facilities
• General Engineering and Construction

ANSI / ASME B16.9 Buttweld Pipe Fitting

ANSI/ASME B16.9 buttweld pipe Fittings (commonly referred to as “B16.9 Fittings”) denote butt-welded pipe fittings conforming to the ASME B16.9 standard. Beyond elbows, they encompass tees, reducers, pipe caps, and other components, though elbows represent the most widely used type. “Butt weld” is the core connection method for these fittings. Both ends of the fitting are designed with the same wall thickness as the pipeline. Through welding, they fuse completely with the pipeline to form a continuous sealed structure. This offers the advantages of high strength and high sealing integrity, enabling them to withstand harsh operating conditions such as high pressure, high temperature, and vibration.

For ASME B16.9 elbow, they not only meet the dimensional and quality requirements of the B16.9 standard but also ensure the overall sealing integrity of the piping system through buttweld connections, effectively preventing medium leakage. This makes them indispensable in fields with extremely high demands for sealing and safety, such as petrochemicals, nuclear power, and aerospace. Furthermore, butt-welded connections offer greater strength than threaded or socket welded joints, reducing stress concentration at pipe-fitting interfaces and extending the service life of piping systems.