EN 10255 — Pipe Dimensions
WELDED & SEAMLESS WROUGHT STEEL PIPE

Threaded Pipe Size Chart

EN 10255 · Medium & Heavy Series, mm & kg/m

TECHNICAL REFERENCE

Non-Alloy Steel Tubes for Welding & Threading

WT in mm  ·  mass in kg/m  ·  red = Heavy series
IDENTIFICATIONMEDIUM SERIESHEAVY SERIES
Thread SizeDNOD max (mm)OD min (mm)WT (mm)Mass (kg/m)WT (mm)Mass (kg/m)
1/8610.69.820.4042.60.487
1/481413.22.30.6412.90.765
3/81017.516.72.30.8392.91.02
1/21521.8212.61.213.21.44
3/42027.326.52.61.563.21.87
12534.233.33.22.4142.93
1-1/43242.9423.23.143.79
1-1/24048.847.93.23.5644.37
25060.859.73.65.034.56.19
2-1/26576.675.33.66.424.57.93
38089.58848.36510.3
4100115113.14.512.25.414.5
5125140.8138.5516.65.417.9
6150166.5163.9519.85.421.3
Source: public reference data based on EN 10255 (Medium & Heavy series). A lighter Light series (L, L1, L2) also exists under this standard but isn't shown here. Purchase the official EN 10255 standard for tolerances and full engineering details.

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