American Threaded Square Head Plug
- Size range: NPS 1/8“-4” (DN 6-100mm)
- Pressure rating: 3000LB/6000LB
- Wall thickness range: 1.73mm (1/8“ 3000LB) ~ 8.56mm (4” 6000LB)
- Standards: ASTM A105, A182 F304/316/L, F11/F22
- Thread Standard: ASME B1.20.1 NPT thread, sealing taper 1:16
- Surface Treatment: Galvanized, blackened, or mechanically polished
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The American Threaded Square Head Plug is a type of pipe end cap primarily sealed via threads, suitable for pipe ends requiring frequent inspection and maintenance. This fitting is easy to install, with a square head design facilitating wrench installation and removal. The American Threaded Square Head Plug is manufactured using forging processes, capable of withstanding environmental temperatures ranging from -29°C to 425°C. Threads can be extended according to standards to meet high-pressure scenarios.
American Threaded Square Head Plug
American Threaded Square Head Plug Core Functions
Based on ASME B16.11 standard
1. Pressure Sealing: Achieves sealing at the pipeline end through metal plastic deformation sealing using NPT thread taper 1:16. Typical application scenarios include installation at the ends of oil and gas pipelines.
2. Convenient Maintenance: Its square head design facilitates quick disassembly, typically used in pipeline maintenance sections of chemical plants.
3. Medium Guidance: The internal thread structure facilitates connection to valves, etc.
In addition to square head plugs, hexagonal head plugs are also available. Hexagonal head plugs possess the advantages of square plugs and are not restricted by space or tools, making them easier to opera
American Threaded Square Head Plug Size
| NPS | DN | O.D.(mm) | Thread | square head size(mm) | W.T.(mm) | pressure | Torque limit(N·m) |
| 1/8 | 6 | 10.29±0.13 | NPT 1/8 | 8.0×8.0 | 2.24↑ | 3000/6000 | 15-20 |
| 1/4 | 8 | 13.72±0.15 | NPT 1/4 | 10.0×10.0 | 2.59↑ | 3000/6000 | 25-35 |
| 3/8 | 10 | 17.15±0.18 | NPT 3/8 | 12.0×12.0 | 2.92↑ | 3000/6000 | 40-50 |
| 1/2 | 15 | 21.34±0.20 | NPT 1/2 | 14.0×14.0 | 3.02↑ | 3000/6000 | 60-75 |
| 3/4 | 20 | 26.67±0.22 | NPT 3/4 | 17.0×17.0 | 3.38↑ | 3000/6000 | 80-100 |
| 1 | 25 | 33.40±0.25 | NPT 1 | 19.0×19.0 | 3.56↑ | 3000/6000 | 120-150 |
| 1 1/2 | 40 | 48.26±0.30 | NPT 1½ | 24.0×24.0 | 4.78↑ | 3000 | 200-240 |
| 2 | 50 | 60.33±0.35 | NPT 2 | 29.0×29.0 | 5.54↑ | 3000 | 300-350 |