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ASME B16.9 Butt Welding Fittings

Views: 14     Author: Site Editor     Publish Time: 2023-11-15      Origin: Site

What Is The ASME B16.9 Standard

The ASME B16.9 is Factory Made Butt welding fittings standard issued by the American Society of Mechanical Engineers (ASME). This standard specifies the types, dimensions, tolerances, and testing methods for butt welding fittings.

How Many Types Of ASME B16.9 Butt Welding Fittings

ASME B16.9 has a variety of product types for butt welding fittings .Common types of butt welding pipe fittings include 90degree elbow, 45degree elbow, tee, cross, cap, concentric reducer, eccentric reducer, stub end, etc.

Butt welding elbow is the most commonly used to pipeline system. It is a pipe fitting that changes direction in the pipeline system.According to different radius, elbows are divided into long radius elbows (1.5D) and short radius elbows (1D);according to different bending angles, they are divided into 45 degree elbows, 90 degree elbows, and 180 degree elbows;according to different manufacturing methods, they are divided into push-molded elbows, extruded elbows, and welded elbows.

Butt welding tee is also a type of pipe fitting that is frequently used in the process of pipeline installation. It is shaped like a T, and according to the diameter, it is divided into equal tee, reducing tee, 45 degree lateral straight tee and 45 degree lateral reducing tee.

Butt welding cross is an important fittings of pipline system, which is usually made of seamless steel pipe or welded steel pipe through pushing, drawing, and extrusion. The connection method is to directly butt weld the cross with the steel pipe. According to the different diameters , it can be divided into equal cross and reducing cross.

Butt welding reducer has two different ends,one end is larger and the other end is smaller.Butt-welded reducer mainly plays the role of connecting pipes, converting large-diameter pipes to small-diameter pipes.Butt welding reducer usually has two types: concentric reducer and eccentric reducer.

Butt welding caps are generally used at the end of pipes to seal them.

The stub ends are often used together with lap joint flanges to provide pipe connection and sealing;According to the stub end length divided into long types and short types.

ASME B16.9 Butt Welding Fittings Dimension Wall Thickness And Tolerance

The ASME B16.9 standard specifies the tolerance for the dimensions of butt-welded pipe fittings, including length, wall thickness, inner diameter, outer diameter, and other aspects. The dimensional deviations must be within the tolerance range specified in the standard.

The ASME B16.9 standard has different design requirements for different types of butt welding pipe fittings.For example, the size range of long radius elbows, tees, reducers, and caps is 1/2"-48"/DN15-DN1200;the size range of short radius elbows, 180degree elbows, and stub ends is 1/2"-24"/DN15-DN600.

Wall Thickness:SCH10-SCH160、XXS。

Dimension List of butt welding long radius elbow


ASME B16.9 Butt Welding Fittings Tolerance

ASME B16.9 Butt Welding Fittings Material

Shanghai Zhucheng Pipe Fitting Manufacturing Co., Ltd. Is a top supplier of pipe fittings. We can produce various materials of butt welding fittings, such as carbon steel, low-temperature carbon steel, pipeline steel, alloy steel, stainless steel, duplex stainless steel, etc.

Carbon Steel Butt Welding Fittings

Stainless Steel Butt Welding Fittings

Advantages and Scope of Application

Variety Material

Wide Application

High safety


Convenient installation

Good cost performance

Butt welding fittings are a very important component in pipeline fittings. They can connect pipelines, change the flow direction of pipelines, reduce fluid resistance, regulate flow rate, etc. Therefore, they are widely used in industries such as chemical, food, petroleum, natural gas, biopharmaceutical, etc.

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