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 of Pipes and Tubes
Pipe, tube and fittings sizes and dimensions. Inside and outside diameters, weights 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.
Piping Thread Standards
Applied threaded standards used for piping connections.
Threads commonly used in Piping
Piping thread standards.
UNC and UNF - Unified Coarce and Unified Fine Inch 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.