
Technical Information
TI153T/02/en
No. 71108021
Industrial protecting tube
omnigrad TA550
Heavy duty - General purpose
From round bar stock - Ø 30 mm
3/4" NPT threaded or flanged weld type
Also ME U 819.02 - type 2
Threaded
process connection
Description
TA550 is an industry standard
thermowell, manufactured from round bar
stock (drilled).
The process connection can be threaded
or flanged weld.
The thermowell stem shape can be
straight or conical.
The extension and the immersion lengths
as well as the bar dimensions can be
chosen according to process
requirements.
A wide choice of standard materials and
process connections is available; other
versions can be ordered according to
specification.
Different grades of surface finishing are
also available.
Flanged
process connection
Application
TA550 is designed for use with resistance
and thermocouple thermometers mainly
in heavy duty applications.

Technical data
Round bar Standard reference: ME U 819.02 - type 2
Extension O.D.: 30 mm
Immersion O.D.: <
Standard ext. length: 70 mm
Standard bore diameter: 7 or 8 mm
Standard material: AISI316/W.1.4401, AISI316L/W.1.4404
22 mm
omnigrad TA550
Connection to
thermometer
Process connection Type: threaded or flanged weld
Tip Bottom shape: straight or conical
Surface Finishing: refer to the order key
Threaded: 1/2" NPT - female
Thread: 3/4" NPT
Flange type: ANSI slip-on
Flange material: AISI 316 or A 105
Flange mounting: threaded and back welded - 3x3 mm wide
Std. bottom thickness: 6 mm
2 Endress+Hauser

omnigrad TA550
Notes:
(1) Wall thickness 3 mm minimum
(Q2 - F) / 2 ≥ 3 mm
(2) Nominal length A: 130 ÷ 1000 mm
Ø 30
½ NPT
”
T
¾ NPT
”
A
U
Ø Q1
Ø F
Ø Q2
Ø 30
½ NPT
”
T
A
Order key
TA550- HEAVY DUTY THERMOWELL - General purpose - From round bar stock
Ø 30 mm - 3/4" NPT threaded or flanged weld type - Also ME U 819.02 - type 2
Extension, thermowell shape and type (2)
A 70 mm T, Q1/Q2=20/14mm tapered, MEU2
Y mm T, Q1=mm, Q2=mm special taper (1)
Immersion Length U (60-930mm) (2)
TC 100 mm immersion length U
XX mm immersion length to specific.
YY mm special immersion length
Thermowell type, price per mm A (U+T)
C Thermowell material: SS316 / 1.4401
D Thermowell material: SS316L / 1.4404
Y Special version
Finishing of immersion length
4 1,6 micron finishing immersion length
1 0,8 micron finishing immersion length
Process connection type
AA Process connection: none (3/4 NPT)
CD Slip-on 1" ANSI 300 RF SS316
CH Slip-on 1 1/2" ANSI 150 RF SS316
CK Slip-on 1 1/2" ANSI 300 RF SS316
CP Slip-on 1 1/2" ANSI 600 RTJ SS316
CV Slip-on 2" ANSI 300 RF SS316
CX Slip-on 2" ANSI 300 RTJ SS316
YY Special version
Flange finishing
1 No flanges finishing (no flange)
2 Flange finishing standard for ASME/ANSI
9 Flange finishing as specified
Thermowell bore diameter F
1 7 mm thermowell bore F
2 8 mm thermowell bore F
9 Special version (1)
Plug and chain
A Safety plug not selected
B Safety plug: SS 304 with chain
Markings
0No marking
1 Punched on markings as specified
U
Ø Q1
Ø F
Ø Q2
TA550- Complete Order Code
Endress+Hauser 3

71108021Supplementary
Documentation
• Technical Information Industrial Protecting Tubes (TI138T/02/en)
TI153T/02/en/05.01
M+SGML 6.0 No. 71108021
F
Endress+Hauser
Gmbh+Co.
Instruments International
P.O. Box 2222
D-79574 Weil am Rhein
Germany
Tel. (07621) 975-02
Tx 773926
Fax (07621) 975 345
http://www.endress.com
info@ii.endress.com