EN 10226 - Pipe Threads where pressure tight joints are made on the threads - Dimensions
EN 10226 threads with 55° angle between the flanks and a connectable root favours sealing.
Note that EN 10226 has replaced BS 21 and ISO 7.
| Pipe Size (inches) | Threads per Inch TPI - Pitch | Pitch (mm) | Major Diameter (mm) | Minor Diameter (mm) |
|---|---|---|---|---|
| 1/16 | 28 | 0.907 | 7.723 | 6.561 |
| 1/8 | 28 | 0.907 | 9.728 | 8.566 |
| 1/4 | 19 | 1.337 | 13.157 | 11.445 |
| 3/8 | 19 | 1.337 | 16.662 | 14.950 |
| 1/2 | 14 | 1.814 | 20.955 | 18.631 |
| 3/4 | 14 | 1.814 | 26.441 | 24.117 |
| 1 | 11 | 2.309 | 33.249 | 30.291 |
| 1 1/4 | 11 | 2.309 | 41.910 | 38.952 |
| 1 1/2 | 11 | 2.309 | 47.803 | 44.845 |
| 2 | 11 | 2.309 | 59.614 | 56.656 |
| 2 1/2 | 11 | 2.309 | 75.189 | 72.226 |
| 3 | 11 | 2.309 | 87.844 | 84.926 |
| 4 | 11 | 2.309 | 113.030 | 110.072 |
| 5 | 11 | 2.309 | 138.430 | 135.472 |
| 6 | 11 | 2.309 | 163.830 | 160.872 |
- 1 inch = 25.4 mm
In order to seal the conical external thread connects with the cylindrical mother screw. The connection don't guarantees sealing - so a sealant should be used.
Symbols used for type of pipe thread
- R - external taper pipe thread
- Rp - parallel internal pipe thread
Example - Designation of Threads
- External taper thread: Pipe thread EN10226 R 3/4
- Internal parallel thread: Pipe thread EN10226 Rp 3/4
Related Topics
• Dimensions
Sizes and dimensions of pipes and tubes, and their fittings - inside and outside diameter, weight and more.
• Threads
Thread data - metric, unified, ACME and others.
Related Documents
ANSI B1.20.1 - NPS - American National Standard Straight Pipe Threads
NPS pressure tight straight pipe threads with lubricant or sealer.
ANSI B1.20.1 - NPT - American National Standard Taper Pipe Threads
NPT and NPTF pipe threads - dimensions according ANSI/ASME B1.20.1/3.
BS 21 - Pressure Tight Pipe Thread Joints
BSPT - British Standard Pipe Taper threads & BSP or BSPF - British Standard Pipe Parallel (Straight) threads.
ISO 228 - Pipe Threads where Pressure Tight Joints are not made on the Threads
Requirements for thread form, dimensions, tolerances and designation for fastening pipe threads, thread sizes.
ISO 7 - Pipe Threads where Pressure-tight Joints are made on the Threads
Pressure-tight joints made on the pipe threads.
ISO 724 - Metric Threads
Dimensions of metric threads according ISO 724.
Standards Applied for Piping Threads
Applied threaded standards used for piping connections.
Threads commonly used in Piping
Piping thread standards.
UNC and UNF - Unified Inch Screw Threads
ANSI/ASME B1.1 Unified National Thread - UNC Coarse series and UNF Fine series.
Whitworth Pipe Threads
BSPP (G) - British Standard Pipe Parallel and BSPT (R/Rp) – British Standard Tapered Pipe for pipes and tapered threads - G/R/Rp.