Thermowells / protection tubes

Name: Thermowells / protection tubes
Brand: WIKA

Thermowells or protection tubes from WIKA are used with demanding operating conditions both in solid-machined versions from bar stock material and in fabricated versions with tubular design. The variants offered differ mainly in their designs; with flanges, threaded or for welding in. The connection of the protection tubes by flange is universal and is used in many processes. The compact form of the threaded connection saves space and mounting is also very easy. If the process safety and robustness is important, the thermowells can be welded into the process directly. Furthermore, all connections for sanitary applications and also thermowells in Vanstone design are available without weld seams. The selection of materials and the manufacturing of the thermowells or protection tubes in accordance with global standards or to customer specifications ensure optimal protection for the sensor.

Price

On request

Depends on configuration

Request a quote

+38 (067) 285-77-70·info@avigan.com.uaViberTelegram

Description

The wake frequency calculation in accordance with ASME PTC 19.3 TW-2016 is applicable for thermowells in tapered, straight or stepped design.

Protection tubes in accordance with DIN 43772 or comparable designs are calculated in accordance with Dittrich/Klotter.

All calculations are valid for non-corrosive or non-abrasive media, unless otherwise specified. The end users are responsible for the conformity of the process data with the calculation bases.

FEM representation of a thermowell within a flow with stress representation at the tip and in the root

As a result of the pipeline design, a vibration excitation is also possible, which is not the subject of the wake frequency calculation.

A warranty by WIKA cannot be given.

Special features

Calculation of thermowells per ASME PTC 19.3 TW-2016
Calculation of thermowells and protection tubes in accordance with Dittrich/Klotter
If the permissible calculated load limits are exceeded, WIKA can, as an engineering service (subject to a charge), provide suggestions for modification of the thermowell design.

Identification

Model	TW10
Product family	TW
Subcategory	ScrutonWell® design

Process conditions

Process connection	flangeVanstoneweldedscrewed
Process temperature	+220…+400 °C

Materials

Probe material	1.4435, 1.4571
Thermowell material	1.4435, 1.4571

Additional details

Probe length	250 mm
Probe diameter	8.5 mm
Thermowell	Yes
Thermowell form	ScrutonWell®
Datasheet languages	EN, DE

Tables from datasheet

Process data	SI unit	Imperial	Others
Flow rate	m/s	ft/s	-
Medium density	kg/m³	lb/ft³	-
Temperature	°C	°F	-
Pressure	bar	psi	-
Dynamic viscosity 1)	mm²/s	ft/1000s	cP

NPS	UOM	Outer diameter of the support collar
		SCH.10	SCH.40	SCH.STD	SCH.80	SCH.XS	SCH.160	SCH.XXS
1"	in	1.107	1.059	1.059	0.967	0.967	0.825	0.609
	mm	28.1	26.9	26.9	24.6	24.6	21.0	15.5
1 ½"	in	1.692	1.620	1.620	1.510	1.510	1.348	1.110
	mm	43.0	41.1	41.1	38.4	38.4	34.2	28.2
2"	in	2.167	2.077	2.077	1.949	1.949	1.697	1.513
	mm	55.0	52.8	52.8	49.5	49.5	43.1	38.4

NPS	UOM	Suggested root diameter at the support collar
		SCH.10	SCH.40	SCH.STD	SCH.80	SCH.XS	SCH.160	SCH.XXS
1"	in	0.938	0.875	0.875	0.813	0.813	0.688	0.500
	mm	23.8	22.2	22.2	20.6	20.6	17.5	12.7
1 ½"	in	1.500	1.375	1.375	1.250	1.250	1.125	1.000
	mm	38.1	34.9	34.9	31.8	31.8	28.6	25.4
2"	in	1.875	1.750	1.750	1.625	1.625	1.500	1.250
	mm	47.6	44.5	44.5	41.3	41.3	38.1	31.8

Description	Tapered and straight designs	Stepped design
	Minimum	Maximum	Minimum	Maximum
Insertion length L	63.5 mm[2.5 in]	609.6 mm[24 in] 1)	127 mm[5 in]	609.6 mm[24 in]
Bore diameter d	3.175 mm[0.125 in]	20.9 mm[0.825 in]	6.1 mm[0.24 in]	6.7 mm[0.265 in]
Tip diameter B	9.2 mm[0.36 in]	46.5 mm[1.83 in]	-	-
Taper ratio B/A	0.58	1	-	-
Step ratio B/A for B = 12.7mm	-	-	0.5	0.8
Step ratio B/A for B = 22.2mm	-	-	0.583	0.875
Bore ratio d/B	0.16	0.71	-	-
Aspect ratio L/B	2	-	2	-
Length ratio Ls/L	-	-	0	0.6
Min. wall thickness (B-d)/2	3 mm[0.12 in]	-	3 mm[0.12 in]	-

View all (9)

Marking	per ASME PTC 19.3 TW-2016	in WIKA data sheets
Insertion length	L	U
Bore diameter	d	B
Tip diameter	B	V
Root diameter	A	Q

Tag no.	T	P	v	rho	Dyn. viscosi-	Mod-	Dimensions in mm[in]	Mate- rial
in °C [°F]	in bar [psi]	in m/s	in kg/ m³	ty in cP	el	U	Ø d	Ø Q	ØV	Tt	NID	NL
TW-0301	220 [428]	1.5 [21.76]	23.6	2.4	0.013	TW10	250 [10.04]	8.5 [0.34]	25 [0.98]	19 [0.75]	6.4 [0.25]	38.3 [1.51]	220 [8.66]	1.4435
TW-0303	220 [428]	1.5 [21.76]	25.7	2.0	0.017	TW10	250 [10.04]	8.5 [0.34]	25 [0.98]	19 [0.75]	6.4 [0.25]	38.3 [1.51]	220 [8.66]	1.4435
TW-0305	235 [455]	10 [145.04]	19.6	6.1	0.015	TW10	250 [10.04]	8.5 [0.34]	25 [0.98]	19 [0.75]	6.4 [0.25]	38.3 [1.51]	220 [8.66]	1.4435
TW-0307	220 [428]	10 [145.04]	13	8.9	0.014	TW10	250 [10.04]	8.5 [0.34]	25 [0.98]	19 [0.75]	6.4 [0.25]	38.3 [1.51]	220 [8.66]	1.4571
TW-0309	235 [455]	30 [435.12]	8.9	28.3	0.013	TW10	250 [10.04]	8.5 [0.34]	25 [0.98]	19 [0.75]	6.4 [0.25]	38.3 [1.51]	220 [8.66]	1.4571
TW-0311	400 [752]	31.5 [456.88]	31.9	10.1	0.017	TW10	250 [10.04]	8.5 [0.34]	25 [0.98]	19 [0.75]	6.4 [0.25]	38.3 [1.51]	220 [8.66]	1.4571

Model	Data sheet
TW10	TW95.10 TW95.11 TW95.12
TW15	TW95.15
TW20	TW95.20
TW25	TW95.25
TW30	TW95.30

Ø d 1	Ø d x
≤ 7	8.5
≤ 8.5	9.5

Tolerances of lengths

L	DIN ISO 27 68-C
L U > 5,000mm	DIN ISO 27 68-V