Buttweld Fitting Couplings Manufacturers in India

Buttweld Fitting Couplings Specification, Grades and Material

About Buttweld Fittings Coupling

A Pipe Coupling is mostly used in piping or plumbing. Pipe Coupling is a very small length of pipe or tube with either socket or female pipe threads at one or both ends that permits two pipes or tubes of equivalent or various sizes to be combined together. Couplings are pipe fittings that help to expand or end pipe runs. These fittings are used to change pipe size and also to repair a wrecked or leaking pipe.
Most pipe establishments require few lengths of pipe to be combined together or cut to facilitate changes in direction and crossing of obstacles. This requires a fast technique of connecting the pipe sections while maintaining the integrity of the pipes in the process. A pipe coupling is a pipe fitting used to join at least two lines so that coherence is kept up between them.

The body of the Pipe Coupling is normally made of either the same or equivalent materials as that of the pipes it joins. They may be rigid or flexible relying upon the amount of movement the pipe is subjected to and may also be permanent or removable. A pipe coupling can be expanded or decreased in internal diameter to combine pipes of various sizes, be T or cross-shaped to join more than two pipes, or angled to form bends. Pipe coupling can also include peripheral features or equipment such as inspection opening, flow meter, or valve.

Categories of Pipe Couplings
Couplings under the scope of pipe fittings can be divided into 2 main categories.

• Permanent Coupling
• Removable Coupling

Permanent Coupling

Permanent Pipe Coupling Is mostly makes use of soldering or brazing in the case of steel or copper pipes or adhesives in the case of PVC pipes. These permanent joints, if correctly put in, provides great rigidity and sealing characteristics where no future changes in the piping are foreseen.

Removable Coupling

A removable pipe coupling is most often of a threaded design which permits them to be screwed onto the pipes to be joined. The basic pipe section is somewhat larger than the pipes to be joined and cut with an internal thread. The ends of the pipes are threaded, and the coupling is directly sealed with sealing tape or hemp and screwed onto both pipes.

Full Coupling

Full Coupling is utilized for connecting small bore pipes. It is used to connect pipes to pipes or pipe to swage or nipple. It can also be threaded or socket ends types.

A socket weld full coupling is utilized to join small-bore plain finish pipes where the pipe spec requirement is socket weld. A threaded full coupling is mostly used to join small bore pipes with threaded ends. If the two ends of coupling differ from one another (e.g. one BSP threaded and one NPT threaded), then it is generally referred to as an adapter.

Half Coupling

Half Coupling is mainly used for small-bore branching from a vessel or big bore pipe. It can be threaded or socket type. It has a socket end or thread end on just 1 side.

A socket weld half coupling can be directly welded to a big bore pipe, to make a branch connection. It is utilized to take a small bore pipe branch-off from a big bore pipe where the pipe spec requirement is socket weld in small bore size. A threaded half coupling just has 1 thread end and another end of the coupling should be a butt welding end with either a plain end or a bevel end.

Reducing Coupling

Reducing couplings are used to connect pipes of dissimilar diameters. A reducing coupling has 2 different sizes of threads on every side. Reducing couplings are generally used where small process feeder lines are joined into big supply circuits or where small diameter fittings are installed. Reducing couplings will have commonly feature a simple, stepped down profile and screw onto the 2 lengths of pipe within the same way as a standard pipe joint does. Welded reducing coupling designs are the same as threaded design but feature no threads.

Compression Coupling

A compression coupling connects 2 perfectly aligned pipes in which a slotted tapered sleeve is placed over the junction and 2 flanges are drawn over the sleeve so that they automatically center the pipes and provide enough contact pressure.

Slip Coupling / Repair Coupling

A slip coupling (it is also known as repair coupling) includes 2 pipes, 1 of that slides out of the other pipe to a various length. Slip coupling is intentionally made without any internal stop, to allow it to be slipped into place in tight locations, such as the repair of a pipe that has a small leak due to corrosion or freeze bursting, or which had to be cut temporarily for some purpose. Whereas the alignment stop is missing, the installer has to very carefully measure the final location of the slip coupling to ensure that it is located perfectly and correctly.