Continental Trade Sp. z o. o.

Technical glass

Precision bore glass tubes

Standard pipes usually have industrial precision. Accuracy are of the order of 0.1% - 1%. This accuracy is sufficient for typical applications, eg. as gauge glass tubes. This type of pipes are discussed on pages: Tubes and cylinders and Gauge glass tubes.

However in some applications (eg. mechatronics, viscosity measurement, control and measuring equipment, etc.) is required far greater accuracy, especially when it comes to the inner diameter of the tube or capillary. In this case, the precision tubes should be used, but they are much more expensive than standard tubes.

High dimensional accuracy is obtained in the heat shrink process of a conventional glass tube at high precision mandrel. In addition, the process may also include precision machining of the ends of the tube; both, mechanical and/or flame. Tube with a precision bore may be the final product but also an intermediate product, which can be used to build the apparatus according to customer requirements.

For the precision tubes (or tubes with high accuracy) the primary dimension is inner diameter ID available in the range of 0,15 mm to 240 mm. Its manufacturing accuracy (depending on the inner diameter) may be up to 0,003 mm. Outer diameter are available in ranges from 2 to 260 mm and an accuracy of 0,002 mm (depending on size). Length of the tubes usually does not exceed 1 000 mm, and the greatest accuracy can reach 0,05 mm.

Below shows the typical dimensions and typical tolerances of precision tubes. On request, we can also supply different dimensions tubes and accuracies, as well as with various methods of surface finish (eg. grounded tube) and the ends of the type (ie. cut, broken, ground, rounded mechanically or thermally, etc.). 

Note: In most applications it is not necessary to use precision tubes, sufficient precision is ensured by typical borosilicate tubes & cylinders or gauge glass tubes. Precision pipes are only used when the inner tube diameter is critical for the application. Remember - precision tubes are custom made and are more expensive than standard tubes.

Inner diameter
ID [mm]
Inner diameter [mm]
Outer diameter
OD [mm]
Outer diameter [mm]
Maximum length 
L [mm]
Maximum length
0,15 ± 0,01 4,0 ± 0,5 350
5,0 ± 0,5
6,0 ± 1,0
7,0 ± 1,0
0,20 ± 0,01 4,0 ± 0,5 350
5,0 ± 0,5
6,0 ± 1,0
7,0 ± 1,0
0,30 ± 0,01 4,0 ± 0,5 1 000
5,0 ± 0,5
6,0 ± 1,0
7,0 ± 1,0
0,40 ± 0,01 4,0 ± 0,5 1 000
5,0 ± 0,5
6,0 ± 1,0
7,0 ± 1,0
8,0 ± 1,0
9,0 ± 1,0
0,50 ± 0,01 4,0 ± 0,5 1 000
5,0 ± 0,5
6,0 ± 1,0
7,0 ± 1,0
8,0 ± 1,0
9,0 ± 1,0
0,60 ± 0,01 5,0 ± 0,5 1 000
6,0 ± 1,0
7,0 ± 1,0
8,0 ± 1,0
9,0 ± 1,0
0,70 ± 0,01 5,0 ± 0,5 1 000
6,0 ± 1,0
7,0 ± 1,0
8,0 ± 1,0
9,0 ± 1,0
0,80 ± 0,01 6,0 ± 1,0 1 000
7,0 ± 1,0
8,0 ± 1,0
9,0 ± 1,0

 

Inner diameter
ID [mm]
Inner diameter [mm]
Outer diameter
OD [mm]
Outer diameter [mm]
Maximum length 
L [mm]
Maximum length
0,90 ± 0,01 5,0 ± 0,5 1 000
6,0 ± 1,0
7,0 ± 1,0
8,0 ± 1,0
9,0 ± 1,0
1,00 ± 0,01 5,0 ± 0,5 1 000
6,0 ± 1,0
7,0 ± 1,0
8,0 ± 1,0
9,0 ± 1,0
1,50 ± 0,01 6,0 ± 1,0 1 000
7,0 ± 1,0
8,0 ± 1,0
9,0 ± 1,0
2,00 ± 0,01 6,0 ± 1,0 1 000
7,0 ± 1,0
8,0 ± 1,0
9,0 ± 1,0
2,50 ± 0,01 6,0 ± 1,0 1 000
7,0 ± 1,0
8,0 ± 1,0
9,0 ± 1,0
3,00 ± 0,01 1,3 ± 0,1 1 000
1,7 ± 0,2
3,5 ± 0,3
3,50 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
3,3 ± 0,3
4,00 ± 0,01 1,2 ± 0,1 1 000
1,7 ± 0,2
2,6 ± 0,3
3,1 ± 0,3
4,0 ± 0,3
4,50 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,5 ± 0,3
4,2 ± 0,3

 

Inner diameter
ID [mm]
Inner diameter [mm]
Wall thickness
s [mm]
Wall thickness [mm]
Maximum length
L [mm]
Maximum length
5,00 ± 0,01 1,1 ± 0,1 1 000
1,7 ± 0,2
2,3 ± 0,3
3,7 ± 0,3
5,20 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,5 ± 0,3
5,40 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,5 ± 0,3
5,60 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,4 ± 0,3
5,80 ± 0,01 1,2 ± 0,1 1 000
1,7 ± 0,2
2,4 ± 0,3
6,00 ± 0,01 1,1 ± 0,1 1 000
1,7 ± 0,2
2,3 ± 0,3
6,20 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,5 ± 0,3
6,40 ± 0,01 1,2 ± 0,1 1 000
2,4 ± 0,2
6,60 ± 0,01 1,0 ± 0,1 1 000
1,7 ± 0,2
2,4 ± 0,3
6,80 ± 0,01 1,0 ± 0,1 1 000
1,7 ± 0,2
2,4 ± 0,3
7,00 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,5 ± 0,3
7,20 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,5 ± 0,3
7,40 ± 0,01 1,1 ± 0,1 1 000
1,7 ± 0,2
2,4 ± 0,3
7,60 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,4 ± 0,3
7,80 ± 0,01 1,1 ± 0,1 1 000
1,7 ± 0,2
2,3 ± 0,3

 

Inner diameter
ID [mm]
Inner diameter [mm]
Wall thickness
s [mm]
Wall thickness [mm]
Maximum length
L [mm]
Maximum length
8,00 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,3 ± 0,3
8,20 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,4 ± 0,3
8,40 ± 0,01 1,2 ± 0,1 1 000
1,7 ± 0,2
2,0 ± 0,2
2,4 ± 0,3
2,8 ± 0,3
8,60 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,0 ± 0,2
2,4 ± 0,3
2,8 ± 0,3
8,80 ± 0,01 1,1 ± 0,1 1 000
1,7 ± 0,2
1,9 ± 0,2
2,3 ± 0,3
2,7 ± 0,3
9,00 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
1,9 ± 0,2
2,3 ± 0,3
2,7 ± 0,3
3,8 ± 0,3
9,20 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,4 ± 0,3
2,6 ± 0,3
3,7 ± 0,3
9,40 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,2 ± 0,3
3,7 ± 0,3
9,60 ± 0,01 1,1 ± 0,1 1 000
1,7 ± 0,2
2,5 ± 0,3
3,6 ± 0,3
9,80 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,4 ± 0,3
4,8 ± 0,5

 

Inner diameter
ID [mm]
Inner diameter [mm]
Wall thickness
s [mm]
Wall thickness [mm]
Maximum length
L [mm]
Maximum length
10,00 ± 0,01 1,1 ± 0,1 1 000
1,6 ± 0,2
2,0 ± 0,2
2,7 ± 0,3
3,5 ± 0,3
10,50 ± 0,01 1,1 ± 0,1 1 000
1,9 ± 0,2
2,7 ± 0,3
3,4 ± 0,3
11,00 ± 0,01 1,1 ± 0,1 1 000
1,3 ± 0,2
2,0 ± 0,2
2,7 ± 0,3
11,50 ± 0,01 1,3 ± 0,2 1 000
1,9 ± 0,2
2,6 ± 0,3
12,00 ± 0,01 1,3 ± 0,2 1 000
2,0 ± 0,2
2,6 ± 0,3
12,50 ± 0,01 1,3 ± 0,2 1 000
1,9 ± 0,2
2,6 ± 0,3
2,7 ± 0,3
13,00 ± 0,01 1,2 ± 0,2 1 000
2.0 ± 0,2
2,6 ± 0,3
13,50 ± 0,01 1,3 ± 0,2 1 000
1,9 ± 0,2
2,4 ± 0,3
2,7 ± 0,3
14,00 ± 0,01 1,2 ± 0,2 1 000
1,9 ± 0,2
2,4 ± 0,3
2,6 ± 0,3

 

Inner diameter
ID [mm]
Inner diameter [mm]
Wall thickness
s [mm]
Wall thickness [mm]
Maximum length
L [mm]
Maximum length
14,50 ± 0,01 1,3 ± 0,2 1 000
1,9 ± 0,2
2,8 ± 0,3
15,00 ± 0,01 1,3 ± 0,2 1 000
1,9 ± 0,2
2,6 ± 0,3
15,50 ± 0,01 1,3 ± 0,2 1 000
1,9 ± 0,2
2,7 ± 0,3
16,00 ± 0,01 1,3 ± 0,2 1 000
1,9 ± 0,3
2,6 ± 0,3
16,50 ± 0,01 1,3 ± 0,2 1 000
2,0 ± 0,2
2,8 ± 0,3
17,00 ± 0,01 1,2 ± 0,2 1 000
1,9 ± 0,2
2,7 ± 0,3
17,50 ± 0,01 1,3 ± 0,2 1 000
1,9 ± 0,2
2,6 ± 0,3
18,00 ± 0,01 1,3 ± 0,2 1 000
1,9 ± 0,2
2,6 ± 0,3
18,50 ± 0,01 1,3 ± 0,2 1 000
2,0 ± 0,2
3,0 ± 0,3
19,00 ± 0,01 1,3 ± 0,2 1 000
1,9 ± 0,2
2,9 ± 0,3
19,50 ± 0,01 1,2 ± 0,2 1 000
1,9 ± 0,2
2,9 ± 0,3

 

Inner diameter
ID [mm]
Inner diameter [mm]
Wall thickness
s [mm]
Wall thickness [mm]
Maximum length
L [mm]
Maximum length
20,00 ± 0,01 1,3 ± 0,2 1 000
2,2 ± 0,2
3,1 ± 0,3
21,00 ± 0,01 1,2 ± 0,2 1 000
1,5 ± 0,2
2,1 ± 0,2
2,9 ± 0,3
22,00 ± 0,01 1,5 ± 0,2 1 000
2,2 ± 0,2
3,0 ± 0,3
23,00 ± 0,01 1,5 ± 0,2 1 000
2,1 ± 0,2
2,9 ± 0,3
24,00 ± 0,01 1,5 ± 0,2 1 000
2,1 ± 0,2
3,0 ± 0,3
25,00 ± 0,01 1,5 ± 0,3 1 000
2,1 ± 0,2
2,9 ± 0,3
5,1 ± 0,5
26,00 ± 0,01 1,5 ± 0,3 1 000
2,1 ± 0,3
3,0 ± 0,3
5,5 ± 0,5
27,00 ± 0,01 1,5 ± 0,3 1 000
2,1 ± 0,3
2,9 ± 0,3
5,4 ± 0,5
28,00 ± 0,01 1,5 ± 0,3 1 000
2,1 ± 0,3
3,0 ± 0,3
5,3 ± 0,5
8,3 ± 0,7
9,8 ± 0,8

 

Inner diameter
ID [mm]
Inner diameter [mm]
Wall thickness
s [mm]
Wall thickness [mm]
Maximum length
L [mm]
Maximum length
29,00 ± 0,01 1,5 ± 0,3 1 000
2,1 ± 0,3
2,9 ± 0,3
5,1 ± 0,5
8,1 ± 0,7
9,6 ± 0,8
30,00 ± 0,01 1,5 ± 0,3 1 000
2,1 ± 0,3
3,0 ± 0,3
5,6 ± 0,5
7,9 ± 0,7
9,4 ± 0,8
35,00 ± 0,01 1,7 ± 0,3 1 000
2,4 ± 0,3
3,4 ± 0,4
5,5 ± 0,5
7,1 ± 0,7
10,2 ± 0,8
40,00 ± 0,01 1,7 ± 0,3 1 000
2,4 ± 0,3
3,3 ± 0,4
3,7 ± 0,4
5,5 ± 0,5
7,8 ± 0,7
9,3 ± 0,8
45,00 ± 0,02 1,9 ± 0,3 1 000
2,6 ± 0,3
3,6 ± 0,4
5,5 ± 0,5
7,1 ± 0,7
10,0 ± 0,8

 

Inner diameter
ID [mm]
Inner diameter [mm]
Wall thickness
s [mm]
Wall thickness [mm]
Maximum length
L [mm]
Maximum length
50,00 ± 0,02 2,6 ± 0,3 1 000
3,4 ± 0,4
4,3 ± 0,5
5,4 ± 0,5
7,6 ± 0,7
9,3 ± 0,9
55,00 ± 0,03 2,4 ± 0,3 1 000
3,4 ± 0,4
4,3 ± 0,5
5,4 ± 0,5
9,8 ± 0,9
60,00 ± 0,03 2,4 ± 0,3 1 000
3,4 ± 0,4
4,3 ± 0,5
5,4 ± 0,5
9,2 ± 0,9
65,00 ± 0,03 2,6 ± 0,3 1 000
3,4 ± 0,4
5,3 ± 0,6
9,7 ± 0,9
70,00 ± 0,03 2,7 ± 0,3 1 000
3,6 ± 0,4
5,3 ± 0,6
7,5 ± 0,8
9,2 ± 0,9
75,00 ± 0,03 2,7 ± 0,3 1 000
3,6 ± 0,4
5,3 ± 0,6
7,9 ± 0,8
9,7 ± 0,9
80,00 ± 0,03 2,6 ± 0,3 1 000
3,6 ± 0,4
5,3 ± 0,6
7,4 ± 0,8
9,2 ± 1,0
85,00 ± 0,03 2,8 ± 0,3 1 000
3,6 ± 0,3
5,3 ± 0,6
7,8 ± 0,9
9,6 ± 1,0

 

Inner diameter
ID [mm]
Inner diameter [mm]
Wall thickness
s [mm]
Wall thickness [mm]
Maximum length
L [mm]
Maximum length
90,00 ± 0,03 2,6 ± 0,3 1 000
3,1 ± 0,3
3,6 ± 0,4
5,3 ± 0,8
7,4 ± 0,9
10,0 ± 1,0
95,00 ± 0,03 3,1 ± 0,5 1 000
5,2 ± 0,8
7,4 ± 0,9
9,6 ± 1,0
100,00 ± 0,04 3,1 ± 0,6 1 000
5,2 ± 0,8
7,4 ± 0,9
9,5 ± 1,0
110,00 ± 0,04 3,1 ± 0,6 1 000
5,2 ± 0,8
7,3 ± 1,0
120,00 ± 0,04 3,1 ± 0,7 1 000
5,2 ± 0,8
7,3 ± 1,0
9,8 ± 1,1
140,00 ± 0,04 3,1 ± 0,7 1 000
5,2 ± 0,8
7,3 ± 1,1
9,7 ± 1,2
150,00 ± 0,05 5,2 ± 0,8 1 000
7,3 ± 1,1
9,6 ± 1,3
160,00 ± 0,05 5,3 ± 0,8 1 000
7,2 ± 1,1
200,00 ± 0,07 7,4 ± 1,2 1 000
9,3 ± 1,4
210,00 ± 0,07 9,5 ± 1,4 1 000
225,00 ± 0,08 7,3 ± 2,0 1 000
9,3 ± 2,0
240,00 ± 0,60 9,4 ± 2,0 1 000

 

  • 0.15 mm ≥ ID < 5.00 mm
  • 5.00 mm ≥ ID < 10.00 mm
  • 10.00 mm ≥ ID < 20.00 mm
  • 20.00 mm ≥ ID < 50.00 mm
  • 50.00 mm ≥ ID < 240.00 mm

The above information has been collected in the form of the PDF below. In this document there are also information on finishing, additional treatment and basic properties of DURAN®  precision bore tubes. We encourage you to download and read.

If you need special dimensions or special finish - please contact us.

While every attempt has been made to verify the source of the information, no responsibility is accepted for accuracy of data.

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