Full and half coupling, equal and reducing, socket weld or threaded.
| Size range | DN6–DN100 standard; DN150–DN200 on request |
|---|---|
| Types | Full, half, reducing |
| Pressure class | 3000LB, 6000LB, 9000LB |
| Standards | ASME B16.11, MSS SP-97, GB/T 14383, SH/T 3410, JIS B2316 |
| Ends | Socket weld, NPT / BSP threaded |
| Testing | PMI, hardness, hydrostatic on request |
The coupling is the simplest forged fitting and the one most often specified badly. Full coupling for a straight joint, half coupling for a branch or a vessel penetration, reducing coupling to step down a small-bore line — each has a different weld preparation and pressure limit.
Full coupling, half coupling, reducing coupling, and coupling with a specified socket depth.
3000LB, 6000LB and 9000LB; DN6–DN100 standard.
Socket depth and thread engagement to ASME B16.11 so the pipe does not bottom out before the weld is complete.
For vessel penetrations, half couplings can be supplied with a contoured end to fit the shell radius — send the shell diameter with the enquiry.
Quotes within one business day. Send grade, size, pressure class, face type and quantity — a drawing works better than a description.
