ANSI/ASME B16.9 Butt Weld Pipe Fitting

 weld fittings, you would find them to be manufactured according to ANSI/Asme B16.9.

Check the differences between socket weld fittings.

Also known by Welded Pipe fittings

Butt weld fittings would also be referred to as welded pipe fittings. When these would be used in stainless steel and carbon steel, they would be able to offer certain advantages as compared to socket weld and Threaded Fittings. Whereas socket weld would only be available up to a specific size, you would find butt weld fittings to be available in sizes starting 1/2 inch to 72 inch.

Like general category of pipe fittings, Butt Weld Pipe Fittings includes:
Butt weld Elbow in 45 degree or 90 degree
Butt weld Tee and Reducing Tee, Reducer, Cap, Cross

Butt weld Elbow

Butt weld elbow is to change fluid direction in pipeline systems, it has long radius (LR) and short radius (SR) types, and has different degree covers 45 degree, 90 degree and 180 degree. So there are:

LR 45 degree butt weld elbow:

45 degree elbow that with long radius (1.5 x Diameter), and change fluid direction by 45 degree.

LR 90 degree elbow:

90 degree Steel Pipe elbow with long radius (1.5 x Diameter).

SR 45 degree elbow: Short radius (1 x Diameter) elbow in 45 degree, change direction.
SR 90 degree elbow: Short radius (1 x Dia) elbow in 90 degree.

180 degree steel pipe tee

More than 90 degree elbow we will call it as steel bend. Like LR/SR 180 degree bend.

Butt weld elbow dimensions could be specified as diameter (in NPS) and thickness according to ANSI, samples as LR 90 degree elbow 4 inch and thickness in schedule 40 or schedule 80.

Butt weld Tee

Butt weld tee (Equal Tee) has a 90 degree branch along with a straight pipe, it will provide a connects for to install an additional equipment to a pipeline. With the tee structural, same sides of the ends could be welded to the pipe, 90 branch was left open for weld another pipe or a device.

Butt weld Equal Tee

Butt weld Reducing Tee

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Same structural of the equal tee, but the 90 degree branch has a smaller size than the straight pipe diameter. So it is used to install a equipment or a pipe with smaller size.

Butt weld Reducer

It has Concentric Reducer and eccentric reducer two types, used for adjust the fluid rate and speed, by welded a large diameter pipe on one end and a smaller diameter pipe on the other end.

Where fitting dimensions of butt weld fittings are concerned, this would consist diameter in NPS and thickness in schedule.

Concentric reducer, eccentric reducers, long radius elbow, tees. The primary reason why these fittings would be used in construction projects is because they would play an important part in branching off, changing the direction of flow, or even mechanically joining equipment to the system. With the help of specified pipe schedule, butt weld fittings would be sold in nominal pipe sizes.