American Threaded Half-Coupling
- NPS: 1/8“ to 4” (DN 6 to 100 mm)
- Class: 1500/2000/3000/6000/9000 lb
- Wall thickness: 1.73 mm (NPS 1/8) to 17.12 mm (NPS 4)
- Thread standard: NPT thread
Firemins offers quality pipes and fittings, please contact us for a detailed quotation.
The American Threaded Half-Coupling is a transition fitting used to connect pipes via a single-end tapered pipe thread (NPT) connection, with the non-threaded end typically connected via butt welding or socket welding. This fitting is suitable for pipeline systems with DN ≤ 100 mm. The Class 6000 NPS 2″ version has a wall thickness of up to 11.13 mm (SCH160). The duplex steel material can withstand H₂S acidic environments and is primarily used in applications such as instrumentation pressure lines and fire protection branch pipes that require a combination of threaded and welded connections.
American Threaded Half-Coupling
American Threaded Half-Coupling ASME B16.11 vs GB/T14626
| Comparison Dimension | ASME B16.11 Standard13 | GB/T14626 Standard6 |
| Scope | NPS 1/8″~4″ forged socket weld/threaded fittings | DN15~DN100 forged fittings |
| Pressure Ratings | Threaded: 2000/3000/6000LB | Unified: 2000/3000/6000PSI (No 9000 class) |
| Socket weld: 3000/6000/9000LB | ||
| Material System | ASTM standards (A105/A182) | CF/AF/LF/SF material grades |
| Manufacturing | Forging + machining; socket bore tolerance ±0.13mm | Socket coaxiality ≤0.8mm; bore straightness ≤1mm/200mm |
| Thread Standard | Mandatory NPT (ASME B1.20.1) | GB/T 12716 thread taper6 |
| Inspection | Visual + dimensional + hardness checks | Includes NDT (RT/UT) |