Pipe fittings play an important role in linking straight tubing or tube sections. For controlling fluid flow, these fittings are often used. It is a big part of the framework for piping & tubing. Buttweld Fittings are one of the most widely used pipe fittings in the piping & tubing system. It acquired its name as Buttweld Fittings based on the butt welding process for which pipes are connected. This is the best and smoothest link than socket weld & threaded connections.
Buttweld fittings for critical applications are the most widely used and preferred fittings. It is widely used over small & long distances in the transport of fluids such as gasoline, gas steam, chemical etc. Don’t be confused between fittings from Buttweld and Buttweld. Both pipes are linked by bolting together in Buttweld fittings, while the pipes in Buttweld are connected by welding. Multiple shapes, different grades and dimensions are required for Buttweld Fittings.
Types of Buttweld Fittings:
1) Buttweld Elbow 45/90/180 Degree
The most widely used elbow styles are the 45 degree/90 degree /180 degree elbows. Small buttweld elbows are formed by the seamless pipes being heated, cut and bent. Larger buttweld elbows are created by using welded pipes or steel plates.
Two special types of elbows for pipes are:
1) Reducing Elbow – It is used to attach where there are different bore sizes of inlet & outlet pipes.
2) Meter Elbow – It is a pipe with a right-angled bend, and it is possible to calculate the flow rate using a gauge.
2) Buttweld Tee
1) Equal Tee: This buttweld fitting is used either at 90 degrees or for connecting the branch pipeline. At all run hand and branch ends, this tee has the same bore diameter as why it was called an equivalent tee.
2) Tee reduction – It is often used for a 90 degree branch pipeline or line. Tee bore size on branch sides is smaller than the run side when decreasing.
3) Unequal Tee – A pipe connector used either at 90 degrees or for connecting the branch pipeline. This tee is called an uneven tee since the bore size has different diameters at the run and branch sides.
3) Buttweld Cross
Buttweld cross fittings are primarily favoured when pipelines are linked at 90 degrees in the branch.
Based on their bore sizes, there are two distinct buttweld cross types:
1) Equal Cross
2) Reducing Cross
4) Buttweld Reducer
1) Concentric reducer – The two ends of the concentric reducer are centrally aligned. To prevent undue pressure drops in the pipeline, these are used to alter the bore size of the pipeline by two steps.
2) Eccentric Reducer – Both ends are in an offset position in the eccentric reducer. Horizontal Pipelines are an application of this.
5) Pipe Cap
It is used to interrupt the flow or blind the pipeline, permanently or temporarily (during repairs and reparation works). Buttweld pipe caps in all sizes & shapes are available.