Type | Snap clamp, bolt clamp, screw clamp, wedge clamp |
Surface | Painting or Galvanizing |
Technical | Forging, high-temperature 1200 forging and into |
Application | Connection of Concrete pump and pump truck pipeline |
Used for | Schwing, PM, Kyokuto, Sany, Zoomlion,Ihi, Niigata |
Size | 4inch-6inch other sizes and types upon request |
NPT Thread
All fittings on this page are described, are provided with NPT thread, ASME B1.20.1. The American National Pipe Thread Tapered, is the best known and most widely used connection where the pipe thread provides both the mechanical joint and the hydraulic seal. NPT has a tapered male and female thread which seals with Teflon® tape or jointing compound.
Dimensions of American Taper Pipe Thread, with Sealant Compound
| DN NPT | Major Diameter mm | Tapping Drill Size mm | TPI | Pitch mm |
| 1/16" | 7.895 | 6.00 | 27 | 0.941 |
| 1/8" | 10.242 | 8.25 | 27 | 0.941 |
| 1/4" | 13.616 | 10.70 | 18 | 1.411 |
| 3/8" | 17.055 | 14.10 | 18 | 1.411 |
| 1/2" | 21.223 | 17.40 | 14 | 1.814 |
| 3/4" | 26.568 | 22.60 | 14 | 1.814 |
| 1" | 33.228 | 28.50 | 11.5 | 2.209 |
| 1 1/4" | 41.985 | 37.00 | 11.5 | 2.209 |
| 1 1/2" | 48.054 | 43.50 | 11.5 | 2.209 |
| 2" | 60.092 | 55.00 | 11.5 | 2.209 |
| 2 1/2" | 72.699 | 65.50 | 8 | 3.175 |
| 3" | 88.608 | 81.50 | 8 | 3.175 |
| 3 1/2" | 101.316 | 94.30 | 8 | 3.175 |
| 4" | 113.973 | 107.00 | 8 | 3.175 |
| 5" | 141.300 | 134.384 | 8 | 3.175 |
| 6" | 168.275 | 161.191 | 8 | 3.175 |
| 8" | 219.075 | 211.673 | 8 | 3.175 |
| 10" | 273.050 | 265.311 | 8 | 3.175 |
| 12" | 323.850 | 315.793 | 8 | 3.175 |
Types of Threaded Fittings by Class and Size
| Description | Class Designation | ||
| 2000 | 3000 | 6000 | |
| Elbows 45 and 90 degrees Tees, Crosses, Coupling Half-Coupling, Cap | 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 Wall | SCH 80 and XS | SCH 160 | XXS |
