Protection Tubes Form 4

Protection tubes form 4 as defined by standard DIN 43 722 are a straight design, reduced at one end, are open at one end and closed at the other end. Typically these protection tubes are made of one piece. The open end has an inner thread, and can be connected to screw-in thermometers.

Further details can be found under the corresponding menu item on our website.

Protection tubes form 4 are equivalent to the weld-in sleeves D1 to D5 resp. DS2 to DS5 listed so far in standard DIN 43 763.

The ordering code of this product is composed of the component name, design type, diameter, extension pipe thread, total length, insertion length and identication letter of the material number or the material number resp. the material description.

Example: Protection tube

For further informations please download our Product Information Protection and neck tubes

Form 4
Form
DIN 43763
Form
DIN 43772
Total length
L in mm
Cone length
U in mm
Inner length
G in mm
Ext. pipe
thread N
Outer diameter
in mm
Inner diameter
d1 in mm
Measuring insert
length for head form B
& 140 mm extension pipe
---



4
110 65 105
M 18 x 1,5




F1 = 24 h7
F3 = 12,5


7

385 / Ø 6 (8)
--- 110 73 105 385 / Ø 6 (8)
D 1 140 65 135 315 / Ø 6 (8)
--- 170 133 165 345 / Ø 6 (8)
D 4 200 65 195
M 20 x 1,5
(G1/2")
F1 = 26 h7
F3 = 12,5
7 375 / Ø 6 (8)
D 2 200 125 195 376 / Ø 6 (8)
D 5 260 125 255 (F1 = 26 h7)
(F3 = 15)
9 435 / Ø 6 (8)
--- 410 275 405 585 / Ø 6 (8)
---


4
110 65 105


M 14 x 1,5



F1 = 18 h7
F3 = 9



3,5
285 / Ø 3
--- 110 73 105 285 / Ø 3
(D1S / DS 3) 140 65 135 315 / Ø 3
--- 170 133 165 345 / Ø 3
(D4S / DS 2) 200 65 195 375 / Ø 3
(D2S / DS 4) 200 25 195 375 / Ø 3
(D5S) 260 125 255 335 / Ø 3