Texas Thermowell

Texas Thermowell
Thermowells, Protection Tubes, Sample Probes
December 2007
Thermowells are recommended for temperature
instruments in process systems where pressure, velocity,
or viscous, abrasive, and corrosive materials are present
individually or in combination. A properly selected
thermowell will protect the temperature instrument from
damage resulting from these process variables.
Additionally, a thermowell enables removal of the
temperature instrument for replacement, repair, or testing
without affecting the process system.
Texas Thermowell Industries (TTI) specializes in the
design and manufacture of all types of thermowells. The
2100 Series thermowell designs shown in this guide are
styles that are popular throughout industry. Special
designs, as well as modifications of our standard offerings,
are also available.
Table of Contents
2100 Series
Thermowells …………………………………
2
2200 Series
Protection Tubes …………………………... 14
2300 Series
Sample Probes ……………………………… 18
TTI is dedicated to unsurpassed quality, on-time delivery,
and competitive pricing. This commitment has been
recognized by the International Standards Organization
(ISO) – our ISO 9001:2000 certification is additional
assurance to our customers that their buying decisions can
be made every day with a higher level of supplier
confidence, and affirms our ongoing commitment to our
quality policy –
“TTI will deliver products, services and information
that meet or exceed customer requirements and
expectations every time.”
This product guide is intended to provide technical data to
deal with most applications. For severe applications not
adequately covered here, please contact the factory for
assistance.
Page 1
2100 Series – Thermowells
SPECIFICATIONS
MANUFACTURING STANDARDS
Materials
TTI thermowells are available in virtually any material to fit
your application. Contact the factory regarding availability
of materials not listed in the “Ordering Information” guide
on page 5.
Bar Stock
Mill Standard +0.000” / -1/32”
Strength
The strength of a thermowell depends on several
parameters that relate thermowell construction to the
installation environment. For most industrial applications,
standard TTI thermowells provide the necessary strength if
the material, style, and length are correctly specified for
the application parameters: fluid type, temperature,
pressure, and fluid velocity. It is important to note that most
thermowell failures are caused by vibration that is induced
by fluid flow.
“U” Dimension
±0.050”
In addition to providing this selection guide, TTI offers
assistance in correctly selecting thermowells, given the
application parameters. This service is available for a
nominal charge. Contact the factory for more information.
Shank O.D.
±0.010”
Overall Length
±0.050”
Tip Thickness
¼” ±0.050” (unless otherwise specified)
Shank Surface Finish
Polished to 16 RMS
Bore
±0.003”
Construction
All 2100 Series thermowell bodies are machined from solid
bar stock. Flange mounts are welded to the thermowell
body. The serial number and material are etched on each
thermowell. Additional tagging for specific customer
requirements is available.
Page 2
THERMOWELL TERMINOLOGY
Process Connection
External means to connect thermowell to process system. Wells can be threaded, bolted (to
matching flange), clamped, or welded in place.
Instrument Connection
Internal threads to connect temperature instrument to thermowell.
“U” Dimension
Length of thermowell immersed into process system. Measured from the base of the process
connection to the end tip of the well.
“T” Dimension
Also called “lag length” or “lagging extension”. Extends length between the instrument and
process connections to accommodate vessel or piping insulation.
“A” Dimension
Instrument insertion length into thermowell. Equal to bore length.
“D” Dimension
Also called “tip diameter”. Diameter of thermowell shank at the end tip of the thermowell. This
dimension may vary with process connection and/or shank design.
“Q” Dimension
Also called “root diameter”. Diameter of thermowell shank below the process connection.
This dimension may vary with process connection and/or shank design.
Bore Diameter
Dimension of internal bore to match the diameter of the instrument inserted into the
thermowell.
Stepped Shank
Also called “reduced tip”. The shank O.D. is reduced over the last 2½” of the “U” dimension
from the standard root diameter to ½” O.D. The stepped shank is available with a 0.260” bore
diameter only.
Straight Shank
Shank O.D. is the same from the root diameter (“Q” dimension) to the tip diameter (“D”
dimension). The straight shank is generally used with a 0.385” or larger bore diameter, but is
also available with a 0.260” bore.
Tapered Shank
Shank O.D. is gradually reduced from the root diameter (“Q” dimension) to the tip diameter
(“D” dimension). The tapered shank is recommended for heavy duty applications
characterized by high vibration, pressure, temperature, and/or velocity.
SELECTION CONSIDERATIONS
Immersion Length (“U” Dimension)
For best temperature measurement accuracy, the “U”
dimension should be long enough to permit the entire
temperature-sensitive part of the measuring instrument to
project into the medium being measured.
Liquid temperature measurement: A properly designed
thermowell will extend into the fluid an amount equal to the
length of the temperature-sensitive zone plus one inch or
greater.
Gas temperature measurement: A properly designed
thermowell will extend into the fluid an amount equal to the
length of the temperature-sensitive zone plus three inches
or greater.
The temperature-sensitive zone for thermocouples and
thermistors is short (right at the tip of the device), enabling
measurement accuracy with limited immersion into the
process fluid.
Bi-metal thermometers, resistance temperature detectors
(RTDs), and liquid-in-glass thermometers have bulbs with
temperature-sensitive zones between one and two inches
long.
Filled-system thermometer bulbs may have temperaturesensitive zones from one to several inches in length.
Bore Diameter
While TTI offers thermowells with bore diameters up to
0.718”, the most common are as follows:
0.260” bore:
Bi-metal Thermometers (¼” stem)
Thermocouples (¼” sheath)
RTDs (¼” sheath)
Liquid-in-glass Test Thermometers (unarmored)
Other elements having 0.252” maximum diameter
0.385” bore:
Bi-metal Thermometers (⅜” stem)
Thermocouples (8 and 14 gage)
Liquid-in-glass Test Thermometers (armored)
Other elements having 0.377” maximum diameter
Shank Style
Page 3
Table 1 provides recommended maximum velocity ratings
for common well length and material combinations. To
reduce the complexity of presenting this information, the
ratings given are based on operating temperatures of
1000°F for carbon steel, 304 SST, and 316 SST wells.
Ratings for brass wells are based on 350°F service.
Ratings for Monel wells are based on 900°F service.
Slightly higher velocity is possible at lower temperatures.
Tapered shank wells provide greater stiffness for the same
sensitivity. The higher strength to weight ratio gives these
wells higher natural frequency than for equivalent straight
shank wells, thus permitting operation at higher fluid
velocities.
Velocity Ratings
In most cases, thermowell failures are not due to the
effects of pressure and temperature. The calculations
necessary to provide adequate strength under given
conditions are familiar enough to permit proper choice of
wall thickness and material.
The velocity ratings provided are extremely conservative
and intended primarily as a guide. Wells are safe from
vibrational destruction if the resonant frequency is well
below the wake frequency, or if the fluid velocity is
constantly fluctuating through the critical velocity point.
Nevertheless, if the installation is not hampered by a
sufficiently stiff well, it is recommended that the values
given not be exceeded.
Less familiar are the vibrational effects to which
thermowells are subjected. Fluid flowing past the well
forms a turbulent wake (the Von Karman Trail), which has
a definite frequency based on the diameter of the well and
the velocity of the fluid. The thermowell must have
sufficient stiffness so that the wake frequency will never
equal the natural frequency of the thermowell itself. If the
natural frequency of the well were to coincide with the
wake frequency, the well would vibrate to destruction and
break off.
Table 1. Maximum Fluid Velocity Ratings (ft/sec)
Shank
Style
Root Dia.
“Q” Dim.
Material
Brass
Carbon Steel
3/4"
304, 316 SST
Monel
Stepped
Brass
Carbon Steel
7/8”
304, 316 SST
Monel
Brass
Carbon Steel
Straight
Any
304, 316 SST
Monel
Carbon Steel
Tapered
Any
304, 316 SST
Monel
Page 4
Process
Fluid
Liquid
Gas
Liquid
Gas
Liquid
Gas
Liquid
Gas
Liquid
Gas
Liquid
Gas
Liquid
Gas
Liquid
Gas
Liquid
Gas
Liquid
Gas
Liquid
Gas
Liquid
Gas
Liquid
Gas
Liquid
Gas
Liquid
Gas
2½”
59.3
207
106
290
148
300
118
261
59.3
207
106
290
148
300
118
261
145
290
260
326
360
349
316
320
270
410
350
483
300
396
4½”
39.8
89.1
71.2
123
99.3
128
79.8
112
47.6
102
84.3
143
117
148
93.3
128
80
150
144
192
199
178
189
150
249
208
272
167
214
Immersion Length – “U” Dimension
7½”
10½”
13½”
16½”
23.9
16.4
9.9
6.6
32.3
42.7
22.8
13.8
9.3
44.9
19½”
22½”
4.8
3.6
6.7
4.9
46.4
23.6
14.3
9.6
6.9
5.1
40.6
20.7
12.4
8.3
6.1
4.5
18.8
11.4
7.6
5.5
4.1
26.2
15.9
10.6
7.6
5.7
53.5
27.2
16.5
11.0
7.9
5.9
46.7
23.7
14.4
9.5
6.9
5.1
48.0
54.1
27.6
16.7
11.1
8.0
6.0
69.5
35.4
20.5
14.3
10.3
7.7
71.9
36.6
21.2
14.8
10.7
8.0
68.1
34.8
20.8
14.0
10.0
7.5
90.3
45.6
27.8
18.5
13.2
9.8
97.3
49.7
30.4
20.3
14.5
10.7
77.5
39.2
23.8
16.0
10.3
7.7
37.0
28.0
51.6
50.6
ORDERING INFORMATION
Example
Model
Number
Series
Material
Immersion
Length
“U” Dim.
Style
Bore
Diameter
Lag
Length
“T” Dim.
Instrument
Connection
Root
Diameter
“Q” Dim.
Tip
Diameter
“D” Dim.
2100
A
105
F43
A
030
A
R
E
Options
-04
-07
-11
Written as: 2100A105F43A030ARE-04-07-11
Material
Material
304 SST
310 SST
316 SST
321 SST
Alloy 20
Code
A
C
D
F
G
Material
Carbon Steel
Hastelloy C
Hastelloy B
Inconel 600
Monel
Code
H
J
K
M
P
Material
Nickel 200
Titanium
Brass
Other (please specify)
Code
T
W
Y
X
Length (“U”) in inches
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
20.5
21.0
21.5
22.0
22.5
23.0
24.0
25.0
Code
130
135
140
145
150
155
160
165
170
175
180
185
190
195
200
205
210
215
220
225
230
240
250
Length (“U”) in inches
26.0
27.0
28.0
29.0
30.0
31.0
32.0
33.0
34.0
35.0
36.0
37.0
38.0
39.0
40.0
41.0
42.0
43.0
44.0
45.0
46.0
47.0
48.0
Code
260
270
280
290
300
310
320
330
340
350
360
370
380
390
400
410
420
430
440
450
460
470
480
Immersion Length (“U” Dimension)
Length (“U”) in inches
1.625
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
Code
016
020
025
030
035
040
045
050
055
060
065
070
075
080
085
090
095
100
105
110
115
120
125
Style
Mounting
Style
Shank Style
Stepped
Threaded
Straight
Tapered
Flanged
Stepped
Process Connection
Code
½” NPT
¾” NPT
1” NPT
1½” NPT
½” NPT
¾” NPT
1” NPT
1½” NPT
½” NPT
¾” NPT
1” NPT
1½” NPT
1”, Class 150
1½”, Class 150
2”, Class 150
1”, Class 300
1½”, Class 300
2”, Class 300
1”, Class 600
1½”, Class 600
2”, Class 600
T21
T22
T23
T24
T31
T32
T33
T34
T41
T42
T43
T44
F21
F22
F23
F24
F25
F26
F27
F28
F29
Mounting
Style
Shank Style
Straight
Flanged
Tapered
Process Connection
Code
1”, Class 150
1½”, Class 150
2”, Class 150
1”, Class 300
1½”, Class 300
2”, Class 300
1”, Class 600
1½”, Class 600
2”, Class 600
1”, Class 150
1½”, Class 150
2”, Class 150
1”, Class 300
1½”, Class 300
2”, Class 300
1”, Class 600
1½”, Class 600
2”, Class 600
1”, Class 900/1500
1½”, Class 900/1500
2”, Class 900/1500
1”, Class 2500
1½”, Class 2500
2”, Class 2500
F31
F32
F33
F34
F35
F36
F37
F38
F39
F41
F42
F43
F44
F45
F46
F47
F48
F49
F51
F52
F53
F54
F55
F56
Page 5
Page 6
Mounting
Style
Shank Style
Stepped
Van Stone
Straight
Tapered
Stepped
Socket
Weld
Straight
Tapered
Process Connection
Code
1”
1½”
2”
1”
1½”
2”
1”
1½”
2”
¾” pipe
1” pipe
¾” pipe
1” pipe
¾” pipe
1” pipe
1½” pipe
V21
V22
V23
V31
V32
V33
V41
V42
V43
K21
K22
K31
K32
K41
K42
K43
Mounting
Style
Shank Style
Weld-In
Tapered
Stepped
Sanitary
Straight
Tapered
Other
(please specify)
Process Connection
Code
¾” pipe (1.05” O.D.)
1” pipe (1.32” O.D.)
1½” pipe (1.9” O.D.)
1½” Tri-Clamp
2” Tri-Clamp
2½” Tri-Clamp
3” Tri-Clamp
1½” Tri-Clamp
2” Tri-Clamp
2½” Tri-Clamp
3” Tri-Clamp
1½” Tri-Clamp
2” Tri-Clamp
2½” Tri-Clamp
3” Tri-Clamp
(please specify)
W41
W42
W43
S21
S22
S23
S24
S31
S32
S33
S34
S41
S42
S43
S44
XXX
Bore Diameter
Bore Diameter
0.260”
0.385”
0.437”
0.515”
Code
A
B
C
D
Bore Diameter
0.656”
0.718”
Other (please specify)
Code
E
F
X
Lag Length (“T” Dimension)
Length (“T”) in inches
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Code
000
005
010
015
020
025
030
Length (“T”) in inches
3.5
4.0
4.5
5.0
5.5
6.0
6.5
Code
035
040
045
050
055
060
065
Length (“T”) in inches
7.0
7.5
8.0
8.5
9.0
9.5
Other (please specify)
Code
070
075
080
085
090
095
XXX
Instrument Connection
Instrument Connection Thread
½” NPT
½” NPSM
¼” NPT
¾” NPT
¾” NPSM
Code
A
B
C
D
E
Instrument Connection Thread
1” NPT
1” NPSM
Other (please specify)
Code
F
G
X
Root Diameter (“Q” Dimension)
Diameter (“Q”) in inches
0.375
0.400
0.500
0.562
0.625
0.680
0.735
0.750
Code
A
B
C
D
E
F
G
H
Diameter (“Q”) in inches
0.766
0.781
0.860
0.875
0.900
1.000
1.050
1.063
Code
J
K
L
M
N
P
Q
R
Diameter (“Q”) in inches
1.125
1.250
1.315
1.375
1.500
1.625
1.900
Other
Code
S
T
U
V
W
Y
Z
X
Diameter (“D”) in inches
0.766
0.781
0.860
0.875
0.900
1.000
1.050
1.063
Code
J
K
L
M
N
P
Q
R
Diameter (“D”) in inches
1.125
1.250
1.315
1.375
1.500
1.625
1.900
Other
Code
S
T
U
V
W
Y
Z
X
Tip Diameter (“D” Dimension)
Diameter (“D”) in inches
0.375
0.400
0.500
0.562
0.625
0.680
0.735
0.750
Code
A
B
C
D
E
F
G
H
Page 7
Options
Option
Thermowell material certificate
Thermowell Wake Frequency Calculation (Configuration Data Sheet Required)
Thermowell special internal pressure testing
Thermowell special external pressure testing
Thermowell dye penetration testing
Special cleaning for oxygen service
NACE MR-01-75 approval
Electropolishing
Stellite overlay
Chrome plating
Full penetration weld
Concentric serrations of thermowell flange face
Flat face flange
Ring Joint flange
Thermowell special surface finish (12Ra Max)
Special stamping
Plug and chain – stainless steel
Plug and chain – brass
Teflon coating
Weldment X-Ray
Tantalum sheath
Titantium sheath
Positive Material Identification (PMI) test
(1)
Code
-01
-02
-03
-04(1)
-05
-06
-07
-08
-09
-10
-11(1)
-12(1)
-13(1)
-14(1)
-15
-17
-18
-19
-20
-21
-22(1)
-23(1)
-24
Available on flanged thermowells only. Only one flange face option allowed.
Example Model Number
Series
2100
Material
A
Immersion
Length
“U” Dim.
Style
105
F43
Written as: 2100A105F43A030ARE-04-07-11
Page 8
Bore
Diameter
Lag Length
A
030
“T” Dim.
Instrument
Connection
Root
Diameter
“Q” Dim.
Tip
Diameter
“D” Dim.
A
R
E
Options
-04
-07
-11
Figure 1. Threaded Thermowells
Stepped
Straight
Tapered
Limited Space Thermowell
Page 9
Figure 2. Flanged Thermowells
Stepped
Straight
Tapered
Page 8
Figure 3. Van Stone Thermowells
Stepped
Straight
Tapered
Page 9
Figure 4. Socket Weld Thermowells
Stepped
Straight
Tapered
Page 10
Figure 5. Sanitary Thermowells
Stepped
Straight
Tapered
Page 13
Figure 6. Weld-In Thermowells
Tapered
Page 12
2200 Series – Protection Tubes
MANUFACTURING STANDARDS
Material
In compliance with ASTM specifications or other applicable
national standard (i.e., ASME, AWS, etc.)
Process Connection
• Flange:
In compliance with ANSI B16.5 prior to
fabrication
• Bushing: Welded in place
• Welded: Bare tube
Instrument Connection
Male pipe thread in compliance with ANSI B1.20.1-92
(1)
“U” Dimension
±0.50” for immersion lengths <60”
±0.75” for immersion lengths 60” to 96”
±1.00” for immersion lengths >96”
Tip Thickness
¼” ±0.050” (unless otherwise specified)
Welding
Flange to Base Metal:
Bushing to Base Metal:
Barstock for Closed-end:
Pipe Cap for Closed-end:
per TTI Dwg. TX-A1
Fillet weld
(1)
per TTI dwg no. TX-FP-TIP
per TTI dwg no. TX-B(1)
Full penetration weld locations are subject to minor distortion and internal filler metal slag.
TERMINOLOGY
Process Connection
External means to connect protection tube to process system. Tubes can be threaded, bolted
(to matching flange), or welded in place.
Instrument Connection
Means to connect temperature instrument to protection tube. Typically male pipe threaded.
“U” Dimension
Length of protection tube immersed into process system. Measured from the base of the
process connection to the end tip of the tube.
“H” Dimension
Also called “head length”. Measured from the base of the process connection to the face of
the instrument connection.
“A” Dimension
Instrument insertion length into protection tube.
Page 13
ORDERING INFORMATION
Example
Model
Number
Series
Material
Immersion
Length
“U” Dim.
Tube Style
Process
Connection
Bore
Diameter
Head
Length
“H” Dim.
Instrument
Connection
2200
A
240
E
09
A
030
A
Options
-01
-07
-11
Written as: 2200A240E09A030A-01-07-11
Material
Material
304 SST
310 SST
316 SST
321 SST
Alloy 20
Code
A
C
D
F
G
Material
Carbon Steel
Hastelloy C
Hastelloy B
Inconel 600
Monel
Code
H
J
K
M
P
Material
Nickel 200
Titanium
Brass
Other (please specify)
Code
T
W
Y
X
Immersion Length (“U” Dimension)
Length (“U”) in inches
12
15
18
21
24
27
30
32
34
36
38
40
42
44
Code
120
150
180
210
240
270
300
320
340
360
380
400
420
440
Length (“U”) in inches
46
48
50
52
54
56
58
60
62
64
66
68
70
72
Code
460
480
500
520
540
560
580
600
620
640
660
680
700
720
Length (“U”) in inches
74
76
78
80
82
84
86
88
90
92
94
96
98
Other (please specify)
Code
740
760
780
800
820
840
860
880
900
920
940
960
980
XXX
Tube Style
Style
Drilled Barstock
Size
½” O.D.
⅝” O.D.
¾” O.D.
⅞” O.D.
1” O.D.
1⅛” O.D.
1¼” O.D.
Code
A
B
C
D
E
F
G
Style
Size
¼”
½”
Pipe
¾”
1”
Schedule
40
80
160
XX Heavy
40
80
160
XX Heavy
40
80
160
XX Heavy
40
80
160
XX Heavy
Code
H
J
K
L
M
N
P
Q
R
T
U
V
W
X
Y
Z
Process Connection
Process Connection
¾” NPT
1” NPT
1½” NPT
2” NPT
Welded
1”, Class 150
1½”, Class 150
Page 14
Code
01
02
03
04
05
06
07
Process Connection
2”, Class 150
3”, Class 150
4”, Class 150
1”, Class 300
1½”, Class 300
2”, Class 300
3”, Class 300
Code
08
09
10
11
12
13
14
Process Connection
4”, Class 300
1”, Class 600
1½”, Class 600
2”, Class 600
3”, Class 600
4”, Class 600
Other (please specify)
Code
15
16
17
18
19
20
XX
Bore Diameter
Bore Diameter
0.260”
0.385”
N/A (Pipe construction)
Other (please specify)
Code
A
B
P
X
Head Length (“H” Dimension)
Length (“H”) in inches(1)
2.0
2.5
3.0
3.5
4.0
4.5
Length (“H”) in inches(1)
5.0
5.5
6.0
6.5
7.0
7.5
Code
020
025
030
035
040
045
Code
050
055
060
065
070
075
Length (“H”) in inches(1)
8.0
8.5
9.0
9.5
Code
080
085
090
095
Other (please specify)
XXX
Instrument Connection
Instrument Connection Thread
½-14 ANPT
½-14 NPSM
Other (please specify)
Code
A
B
X
Options
Option
Material certificate
Wake Frequency Calculation (Configuration Data Sheet
Required)
Special internal pressure testing
Special external pressure testing
Dye penetration testing
Special cleaning for oxygen service
NACE MR-01-75 approval
Electropolishing
Stellite overlay
Chrome plating
Full penetration weld
Concentric serrations of flange face
Flat faced flange
Ring Joint Flange
Special surface finish (12Ra Max)
Special stamping
Plug and chain – stainless steel
Plug and chain – brass
Weldment X-Ray
Positive Material Identification (PMI) test
(1)
Code
-01
-02
-03
-04(1)
-05
-06
-07
-08
-09
-10
-11(1)
-12(1)
-13(1)
-14(1)
-15
-17
-18
-19
-21
-24
Available on flanged thermowells only. Only one flange face option allowed.
Example Model Number
Series
2200
Material
A
Immersion
Length
“U” Dim.
Tube Style
240
E
Process
Connection
Bore
Diameter
Head Length
09
A
030
“H” Dim.
Instrument
Connection
A
Options
-01
-07
-11
Written as: 2200A240E09A030A-01-07-11
Page 15
Figure 7. Drilled Barstock Protection Tubes
Threaded (Bushing)
Flanged
Weld-In
Page 16
2300 Series – Sample Probes
MANUFACTURING STANDARDS
Bar Stock
Mill Standard +0.000” / -1/32”
Overall Length
±0.050”
Shank O.D.
±0.010”
Shank Surface Finish
Polished to 16 RMS
“U” Dimension
±0.050”
Bore
±0.003”
ORDERING INFORMATION
Example
Model
Number
Series
2300
Material
A
Immersion
Length
“U” Dim.
Process
Connection
Bore
Diameter
Lag Length
070
T21
A
000
“T” Dim.
Sampler
Connection
Shank
Diameter
“D” Dim.
A
H
Options
-01
-08
Written as: 2300A070T21A000AH-01-08
Material
Material
304 SST
310 SST
316 SST
321 SST
Alloy 20
Code
A
C
D
F
G
Material
Carbon Steel
Hastelloy C
Hastelloy B
Inconel 600
Monel
Code
H
J
K
M
P
Material
Nickel 200
Titanium
Brass
Other (please specify)
Code
T
W
Y
X
Length (“U”) in inches
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
20.5
21.0
21.5
22.0
22.5
23.0
24.0
25.0
Code
130
135
140
145
150
155
160
165
170
175
180
185
190
195
200
205
210
215
220
225
230
240
250
Length (“U”) in inches
26.0
27.0
28.0
29.0
30.0
31.0
32.0
33.0
34.0
35.0
36.0
37.0
38.0
39.0
40.0
41.0
42.0
43.0
44.0
45.0
46.0
47.0
48.0
Code
260
270
280
290
300
310
320
330
340
350
360
370
380
390
400
410
420
430
440
450
460
470
480
Immersion Length (“U” Dimension)
Length (“U”) in inches
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
Code
015
020
025
030
035
040
045
050
055
060
065
070
075
080
085
090
095
100
105
110
115
120
125
Page 17
Process Connection
Mounting Style
Threaded
Flanged
Other
Bore Diameter
Process Connection
Code
½” NPT
¾” NPT
1” NPT
1”, Class 150
1½”, Class 150
2”, Class 150
1”, Class 300
1½”, Class 300
2”, Class 300
1”, Class 600
1½”, Class 600
2”, Class 600
(please specify)
T31
T32
T33
F31
F32
F33
F34
F35
F36
F37
F38
F39
XXX
Bore Diameter
0.260”
0.385”
Other (please specify)
Code
A
B
X
Lag Length (“T” Dimension)
Length (“T”) in inches
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Code
000
005
010
015
020
025
030
Length (“T”) in inches
3.5
4.0
4.5
5.0
5.5
6.0
6.5
Code
035
040
045
050
055
060
065
Length (“T”) in inches
7.0
7.5
8.0
8.5
9.0
9.5
Other (please specify)
Code
070
075
080
085
090
095
XXX
Sampler Connection
Instrument Connection Thread
½-14 ANPT
½-14 NPSM
Other (please specify)
Code
A
B
X
Shank Diameter (“D” Dimension)
Diameter (“D”) in inches
0.375
0.400
0.500
0.562
0.625
0.680
0.735
0.750
Code
A
B
C
D
E
F
G
H
Diameter (“D”) in inches
0.766
0.781
0.860
0.875
0.900
1.000
1.050
1.063
Code
J
K
L
M
N
P
Q
R
Diameter (“D”) in inches
1.125
1.250
1.315
1.375
1.500
1.625
1.900
Other
Code
S
T
U
V
W
Y
Z
X
Options
Option
Material certificate
Wake Frequency Calculation (Configuration Data Sheet Required)
NACE MR-01-75 approval
Electropolishing
Full penetration weld
Concentric serrations of thermowell flange face
Flat face flange
Ring Joint flange
Special surface finish (12Ra Max)
Special stamping
Weldment X-Ray
Positive Material Identification (PMI) test
(1)
Code
-01
-02
-07
-08
-11(1)
-12(1)
-13(1)
-14(1)
-15
-17
-21
-24
Available on flanged thermowells only. Only one flange face option allowed.
Example Model Number
Series
2300
Material
A
Immersion
Length
“U” Dim.
Process
Connection
Bore
Diameter
Lag Length
070
T21
A
000
Written as: 2300A070T21A000AH-01-08
Page 18
“T” Dim.
Sampler
Connection
Shank
Diameter
“D” Dim.
A
H
Options
-01
-08
Figure 8. Sample Probe
Threaded
Flanged
Page 19
Page 20