Inch pipe diameter

Pipe diameter inch, What pipe diameters are there? What DN sizes are there? Pipe diameter table, Pipe diameter DN table,
Pipe diameter inch

Historically, the dimensions for inch tubes referred to the inside diameter. A 1 inch pipe had an inner diameter of 25.4mm. In those days, the quality of steel was not as good as it is today, and the outside diameter of a 1 inch pipe was about 33mm. Fittings and tools were also made to this dimension.

 

By improving the materials used, the wall thickness of the pipes could be reduced more and more. As the molded parts and fittings and tools were manufactured for the outer diameter of approx. 33mm, the inner diameter of the pipe became larger. Therefore, the inch pipes no longer correspond to any of today's standard inch dimensions and are now defined metrically. Today, if you have an inch pipe with an outer diameter of about 33mm, it is called a 1 inch pipe. The inner diameter is not defined in any standard and can vary.

As you can see, it is not easy to find the right one for inch pipes.

 

The inch pipe table below should help you to find the right inch pipe.

 

Example: 1 inch pipe outer diameter

 

1 inch pipe outer diameter = min. 32.89mm - max. 33.25mm

 

In the table below you can find all common inch pipe outside diameters.

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Inch pipe outside diameter according to DIN EN ISO 228-1 and DIN 2999

 

Inch pipe outer diameter, Whitworth pipe thread for threaded pipe and fittings, Cylindrical female thread and tapered male thread, thread dimensions. In the table you find hte minimum and maximum Inch pipe outer diameter.

 

Inch thread

Inch pipe outer diameter

minimum

Inch pipe outer diameter

maximum

 1/16 Inch pipe  7,51 mm  7,72 mm
 1/8 Inch pipe  9,51 mm  9,73 mm
 1/4 Inch pipe  12,91 mm  13,12 mm
 3/8 Inch pipe  16,41 mm  16,66 mm
 1/2 Inch pipe  20,67 mm  20,96 mm
 5/8 Inch pipe

 22,63 mm

 22,91 mm
 3/4 Inch pipe  26,16 mm  26,44 mm
 7/8 Inch pipe  29,92 mm  30,20 mm
 1 Inch pipe  32,89 mm  33,25 mm
 1 1/8 Inch pipe  37,54 mm  37,90 mm
 1 1/4 Inch pipe  41,55 mm  41,91 mm
 1 1/2 Inch pipe  47,44 mm  47,80 mm
 1 3/4 Inch pipe  53,39 mm  53,75 mm
 2 Inch pipe  59,25 mm  59,61 mm
 2 1/4 Inch pipe  65,27 mm  65,71 mm
 2 1/2 Inch pipe  74,75 mm  75,18 mm
 2 3/4 Inch pipe  81,10 mm  81,53 mm
 3 Inch pipe  87,45 mm  87,88 mm
 3 1/2 Inch pipe  99,99 mm  100,33 mm
 4 Inch pipe  112,60 mm  113,03 mm
 4 1/2 Inch pipe  125,30 mm  125,73 mm
 5 Inch pipe  138,00 mm  138,43 mm
 5 1/2 Inch pipe  150,70 mm  151,13 mm
 6 Inch pipe  163,40 mm  163,83 mm

* All data without guarantee.

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Inch pipe outside diameter according to DIN EN ISO 6708 and DIN 10255

 

Inch Pipe Outer Diameter for Piping Components - Definition and Selection of DN (Nominal Diameter)

 

Inch thread

DN Diameter Nominal

(Nominal pipe diameter)

 

Inch pipe diameter

 

 1/4 Inch pipe 8 mm 13,5 mm
 3/8 Inch pipe 10 mm 17,2 mm
 1/2 Inch pipe 15 mm 21,3 mm
 3/4 Inch pipe 20 mm 26,9 mm
 1 Inch pipe 25 mm 33,7 mm
 1 1/4 Inch pipe 32 mm 42,4 mm
 1 1/2 Inch pipe 40 mm 48,3 mm
 2 Inch pipe 50 mm 60,3 mm
 2 1/2 Inch pipe 65 mm 76,1 mm
 3 Inch pipe 80 mm 88,9 mm
 4 Inch pipe 100 mm 114,3 mm
 5 Inch pipe 125 mm 139,7 mm
 6 Inch pipe 150 mm 168,3 mm
8 Inch pipe 200 mm 219,1 mm
10 Inch pipe 250 mm 273,0 mm

* All data without guarantee.

Inch pipe inner diameter and outer diameter - table

 

Pipe diameter for plastic pressure pipes (PVC) according to DIN EN ISO 1452-2 and DIN 8062

 

Nominal width

 DN

Inch pipe

Innendurchmesser

Zoll Rohr

Außendurchmesser

Zoll Rohr

Wall thickness

Pipes according to DIN 8062, series 4 (nominal pressure PN 10 at 20°C water temperature)

 DN 50 57,0 mm 63 mm 3,0 mm
 DN 65 67,8 mm 75 mm 3,6 mm
 DN 80 81,4 mm 90 mm 4,3 mm
 DN 100 99,4 mm 110 mm 5,3 mm
 DN 125 126,6 mm 140 mm 6,7 mm
 DN 150 144,6 mm 160 mm 7,7 mm
 DN 200 203,4 mm 225 mm 10,8 mm
Pipes according to DIN 8062, series 5 (nominal pressure PN 16 at 20°C water temperature)
 DN 80 76,6 mm 90 mm 6,7 mm
 DN 100 93,6 mm 110 mm 8,2 mm
 DN 125 119,2 mm 140 mm 10,4 mm
 DN 150 136,2 mm 160 mm 11,9 mm
 DN 200 191,6 mm 225 mm 16,7 mm

* All data without guarantee.

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