Thermowells for thermometers
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Table of contents:
1 Scope and benefits .......................................................................................................................................................... 4
1.1 Scope ....................................................................................................................................................................... 4
1.2 Benefits ................................................................................................................................................................... 4
2 Construction ................................................................................................................................................................... 5
2.1 Genereal information ............................................................................................................................................. 5
2.2 Process temperature range .................................................................................................................................... 7
2.3 Mechanical construction of TA541 ...................................................................................................................... 8
2.4 Mechanical construction of TA414 ...................................................................................................................... 9
2.5 Mechanical construction of TA540 .................................................................................................................... 10
2.6 Mechanical construction of ТА556 .................................................................................................................... 11
2.7 Mechanical construction of ТА560 .................................................................................................................... 12
2.8 Mechanical construction of ТА565 .................................................................................................................... 13
2.9 Mechanical construction of ТА566..................................................................................................................... 14
2.10 Mechanical construction of ТА570, ТА571, ТА572 ....................................................................................... 15
2.11 Mechanical construction of ТА575, ТА576 .................................................................................................... 16
2.12 Mechanical construction of ТА535 .................................................................................................................. 17
2.13 Mechanical construction of ТА550 .................................................................................................................. 18
2.14 Mechanical construction of ТА555 .................................................................................................................. 19
2.15 Mechanical construction of ТА557 .................................................................................................................. 20
2.16 Mechanical construction of ТА562 .................................................................................................................. 21
2.17 Mechanical construction of ТW10 ................................................................................................................... 22
2.18 Mechanical construction of ТW11 ................................................................................................................... 23
2.19 Mechanical construction of ТW12 ................................................................................................................... 24
2.20 Mechanical construction of ТW13 ................................................................................................................... 25
2.21 Mechanical construction of ТW15 ................................................................................................................... 26
2.22 Mechanical construction of ТW45 ................................................................................................................... 27
2.23 Mechanical construction of ТW47 ................................................................................................................... 28
2.24 Mechanical construction of MLTWS01 ............................................................................................................ 29
2.25 Mechanical construction of TW251 ................................................................................................................. 30
2.26 Mechanical construction of TWF11 и TWF16 ................................................................................................ 31
2.27 Mechanical construction of TT411 ................................................................................................................... 32
2.28 Mechanical construction of TT511 ................................................................................................................... 33
2.29 Mechanical construction of TTSP ...................................................................................................................... 34
3 Installation .................................................................................................................................................................... 35
4 Comissioning ................................................................................................................................................................ 36
5 Maintenance and repair .............................................................................................................................................. 36
6 Storage and transport .................................................................................................................................................. 36
7 Conservation ................................................................................................................................................................. 36
8 Assigned indicators ...................................................................................................................................................... 36
9 Limit state criteria ....................................................................................................................................................... 36
10 Occurrence of critical failures ................................................................................................................................... 36
11 Dismantling ................................................................................................................................................................. 36
12 Disposal ....................................................................................................................................................................... 37
13 Marking ...................................................................................................................................................................... 37
14 Manufacturer ............................................................................................................................................................. 37
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Thermowells for thermometers
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1 Scope and benefits
1.1 Scope
Thermowells are used for the following purposes:
• To protect thermometers from mechanical and chemical influences of the processes.
• To protect thermometers from unfluences of pressure in pipelines, reactors and tanks.
1.2 Benefits
Thermowells are made from bar stock and from pipe.
Process connection can be threaded, flanged, welded and clamp.
Thermowells are made of different materials that provide corrosion resistance in any of the process.
Possibility of calibration, repair and maintenance of thermometer without stopping of the process.
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Thermowells for thermometers
max. process
pressure, MPa2
AISI 316, 316L,
A105, 446
AISI 316, 316L,
A105, 446
AISI 304, 316,
316L, 316Ti
AISI 316, 316L,
316Ti, 321
AISI 316, 316L,
316Ti, A105
AISI 316L,
316Ti,
Hastelloy C
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2 Construction
2.1 Genereal information
Endress+Hauser offers a complete range of standardized thermowells. Its construction covers a very large
amount of industrial standards as DIN, Dow Chemical, Du Pont, ENI, etc.
Two different types of thermowell construction are available: from drilled bar stock and from pipe.
Herein you can find general information about thermowells.
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Thermowells for thermometers
AISI 316L,
316Ti,
Hastelloy C276,
Inconel 600,
PTFE, PVDF,
Tantalum
AISI 316Ti,
A182, A105,
Hastelloy C276,
Titanium,
Duplex
SAF2205,
1.5415, 1.7380
Hygienic
adapters up to
2”
Socket weld-in,
Threads ¼”, ½”
AISI 316L, 310,
304, 446,
Inconel 600,
601, Incoloy
800, Hastelloy
X, Kanthal AF,
сплав NiCО,
керамические
материалы:
C610, SiC
сплав, Kanthal
Super, SiN
сплав
Welded extension
pipe / Bar stock
Hygienic
adapters up to
2”
Special version,
any construction
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1
– depends of ordercode, for special version can be different
2
– depends of ordercode
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Thermowells for thermometers
Max. process temperature, С
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2.2 Process temperature range
Process temperature range depends of thermowell material, herein you can find maximum process temperature
ranges:
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Thermowells for thermometers
Diameter protection tube tip
Length of protection tube tip
Thread length for
thread connection
on thermometer
Thread length for
thread connection
on process
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2.3 Mechanical construction of TA541
Pic. 1 – thermowell ТА541 – dimensions in mm (in)
Thermowell ТА541 is made from pipe with bottom thickness 5 mm, outer diameter 13,7mm, 21,34mm or
26,67mm (depends of ordercode), threaded or flanged process connections.
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Thermowells for thermometers
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2.4 Mechanical construction of TA414
Pic.2 – thermowell TA414 – dimensions in mm
L – immersion length
Thermowell ТА414 is made from pipe with bottom thickness 3 mm, outer diameter 4,5mm, threaded process
connections, thermowell is used for thermometers with diameter of measuring insert 3 mm.
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Thermowells for thermometers
Diameter protection tube tip
Length of protection tube tip
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2.5 Mechanical construction of TA540
Pic. 3 – thermowell ТА540 – dimensions in mm (in)
1 without process connection
2 thread NPT
3 thread М20
4 flanged process connection
Thermowell ТА540 is made from pipe with bottom thickness 5 mm, outer diameter 13,7mm, 21,34mm or
26,67mm (depends of ordercode), threaded or flanged process connections.
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Thermowells for thermometers
Diameter protection tube tip
Length of protection tube tip
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2.6 Mechanical construction of ТА556
Pic. 4 – thermowell ТА556 - dimensions in mm (in)
Thermowell ТА556 is made from round bar stock (drilled) with bore diameter 10 mm or 14mm (special version
for other diameters), cylindrical form with straight or tapered bottom shape, threaded or flanged process
connections.
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Thermowells for thermometers
Diameter protection tube tip
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2.7 Mechanical construction of ТА560
Pic. 5 – thermowell ТА560
Thermowell ТА560 is made from round bar stock (drilled) with bore diameter 6.5 mm or 10 mm (special version
for other diameters), cylindrical form with straight or tapered bottom shape, threaded process and thermometer
connections.
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