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Pipe per. Threads EN 10226-1 Calculator

Pipe Threads for Pressure Joints per. EN 10226-1 Calculator

EN 10226 specifies the requirements for thread form, dimensions, tolerances and designation for jointing pipe threads, sizes 1/6 to 6 inclusive, for joints made pressure-tight by the mating of the threads. These threads are taper external and parallel internal and are intended for use with pipes suitable for threading and for valves, fittings's or other pipeline equipment interconnected by threaded joints.

Note:

The main dimensions were covered into millimetres on the basis of 1 inch = 25,4 mm, beginning with the number of threads per inc, which determines the pitch P, the formula h (the height of thread) = 0,640327 P and the major diameter at the gauge plane. Pitch diameter and minor diameter then compiled by subtracting once or twice respectively the height of thread h from the major diameter. The nominal gauge length, the tolerances and the assembly length were directly computed. The remaining lengths given in table 1 were obtained by subtracting or adding the tolerances or assembly length respectively to the nominal gauge length. Tolerance and assembly lengths are expressed in millimetres and in number of turns of thread.

^a For parallel internally threaded parts the diametral tolerances are derived from the tolerances in the calculator denoted with ^d by multiplying with the corresponding pitch in the calculator denoted by ^e and with 1/16, the amount to taper.

^b informative tolerances, in millimetres, are obtained from the mandatory values in turns of threads by multiplying with the corresponding pitch denoted as ^e and rounding to the nearest 0,1 mm.

Parallel Thread (Internal)

Where:

P = pitch
H = 0,960491 P
h = 0,640327 P
r = 0,137329 P

Taper thread (external)

Where:

1 = gauge plane
2 = taper
P = Pitch
H = 0,960237 P
h = 0,640327 P
r = 0,137278 P

Source:

EN 10226-1

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