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SOCKET WELD FITTINGS

Socket Weld fittings general

A Socket Weld is a pipe attachment detail in which a pipe is inserted into a recessed area of a Valve, fitting or flange. In contrast to buttweld fittings, Socket Weld fittings are mainly used for small pipe diameters (Small Bore Piping); generally for piping whose nominal diameter is NPS 2 or smaller.

To join pipe to Valves and fittings or to other sections of pipe, fillet-type seal welds be used. Socket Welded Joints construction is a good choice wherever the benefits of high leakage integrity and great structural strength are important design considerations.

Fatigue resistance is lower than that in butt-welded construction due to the use of fillet welds and abrupt fitting geometry, but it is still better than that of most mechanical joining methods.

Some details of Socket Weld fittings

SW Fittings are family of high pressure fittings are used in various industrial processes.

Types Of Socket Weld Fittings By Class, Size And Wall Thickness

Description
Class Designation
3000
6000
9000
Elbows 45 and 90 degrees,
Tees, Crosses, Couplings,
Half-Couplings,
End or Pipe Caps
1/2 – 4
1/2 – 2
1/2 – 2
1/2 – 4
1/2 – 2
1/2 – 2
1/2 – 4
1/2 – 2
1/2 – 2
Pipe Size by Wall Thickness
SCH 80 / XS
SCH 160
XXS

Plugs and Bushings are not identified. They may be used up through Class 6000 NPS

ADVANTAGES

DISADVANTAGES

Fittings for Socket Weld Pipe systems

FULL-COUPLING

A Full Coupling, joins pipe two pipe or to a nipple etc..

HALF-COUPLING

The Half Coupling can be directly welded to the run pipe, to make a branch connection.

REDUCING COUPLING

The Reducing Coupling joints two different outside diameters of pipe.

REDUCER INSERT

Socket Weld Reducer Inserts are manufactured to MSS SP-79. They enable quick and economic combinations of pipeline reductions to be made using standard Socket Weld fittings.

UNION (MSS SP-83)

It is a screwed joint design and it consists of three interconnected pieces: two internally threads and a centerpiece that draws the ends together when rotated. Unions should be screwed tight before the ends are welded to minimize warping of the seats.

ELBOW 90°

This Elbows make 90° changes of direction in the run of pipe.

ELBOW 90°

This Elbows make 45° changes of direction in the run of pipe.

TEE STRAIGHT

This Tee makes 90° branch from the main run of pipe.

CROSS

Crosses makes 90° branch from the main run of pipe.

CAP (END CAP)

Seals the end of pipe.

REMARK(S) OF THE AUTHOR…

A SIMPLE MANNER TO MAKE A 1/16″ GAP…

For both solutions, ask your customer for permission.

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