Forged coupling joining two pipes in line. Produced as full coupling and half coupling; the half coupling is also used as a branch connection.
| Standard | ASME B16.11 |
|---|---|
| Size range | 1/8" – 4" |
| Type | Full coupling, half coupling, reducing coupling |
| Pressure class | 3000#, 6000#, 9000# |
| End connection | Socket weld (SW) or NPT threaded |
| Material | ASTM A105, A350 LF2, A182 F304/F316, F11, F22 |
Selection and ordering notes
Socket weld and threaded fittings are used on drains, vents, instrument and utility lines of 2" and below. The socket weld type allows higher pressure, while the threaded type is the answer where welding is not possible.
Threading reduces the section, so SCH 80 pipe is normally required. Classes are given as 3000#, 6000# and 9000#. See five rules for fitting a flange for the details.
Forged coupling joining two pipes in line. Produced as full coupling and half coupling; the half coupling is also used as a branch connection.
Dimensions and tolerances are given in the original drawing and table on the technical document tab. Material certificates (EN 10204 3.1 / 3.2) and inspection reports are supplied with the order file.
