2. Design and function
DIN 11866 row B or ISO pipes
DIN 11866 row A or metric
3) Maximum operating temperature 150 °C
4) All thermowells of this series that are internally pressurised, with a nominal diameter (DN) > 25 mm, are
manufactured and tested to module H of the pressure equipment directive.
Nominal
width of
pipe
Nominal
pressure
in bar
Outer
diameter
of pipe
Pipe
schedule
Pipe
length
Thermowell
insertion
length
Neck tube
length
TR21-B TR22-B
DN (OD) PN 3) 4) Ø D s TL L1U1M M
8 (13.5) 25 13.5 1.6 32 55 14 43 121
10 (17.2) 25 17.2 1.6 34 55 16 41 119
15 (21.3) 25 21.3 1.6 36 58 18 39 117
20 (26.9) 25 26.9 1.6 55 81 30 27 105
25 (33.7) 25 33.7 2.0 60 91 30 27 105
32 (42.4) 25 42.4 2.0 65 102 30 27 105
40 (48.3) 25 48.3 2.0 65 108 30 27 105
50 (60.3) 25 60.3 2.0 90 145 45 12 90
65 (76.1) 16 76.1 2.0 110 173 45 12 90
80 (88.9) 16 88.9 2.3 130 203 45 12 90
Nominal
width of
pipe
Nominal
pressure
in bar
Outer
diameter
of pipe
Pipe
schedule
Pipe
length
Thermowell
insertion
length
Neck tube
length
TR21-B TR22-B
OD PN 3) 4) Ø D s TL L1U1M M
10 25 13 1.5 35 55 14 43 121
15 25 19 1.5 35 55 18 39 117
20 25 23 1.5 40 63 18 39 117
25 25 29 1.5 50 77 30 27 105
32 25 35 1.5 55 87 30 27 105
40 25 41 1.5 60 97 30 27 105
50 25 53 1.5 80 126 30 27 105
65 16 70 2.0 105 165 45 12 90
80 16 85 2.0 130 201 45 12 90
100 12.5 104 2.0 155 241 45 12 90