TUBESKIN TEMPERATUREMEASUREMENT TECHNICAL REFERENCE

TUBESKIN TEMPERATUREMEASUREMENT TECHNICAL REFERENCE

8000W1000F1000S

KN4-A BSZ-HBSZ

Weld Pad V-Pad Shroud Sensor

Part of Your Business

TC59 Tubeskin Thermocouple Assembly

TC59 tubeskin assemblies are designed to measure surface

temperature of pipes and tubes typically located within boilers, cokers,

furnaces, heat exchangers, and reactors. This model of thermocouple

is typically used within industrial high temperature and/or corrosive

environments where fast and accurate temperature measurement is

critical. Three common designs are available including the patented

V-Pad, Shroud sensor and Weld Pad.

The most important considerations for effective tubeskin design are

repeatability, durability and accuracy. To achieve these functions the

thermocouple must incorporate within its design excellent insulation

properties, material compatibility and good physical contact with the

tube. It must also have the ability to withstand high radiant temperatures

and stresses, and in some cases harsh combustion chemistry.

With all tubeskin designs the correct installation is of prime importance.

Incorrect attachment can ultimately lead to inaccurate temperature

readings.

Applications:TC59 series tubeskin assembly applications include:

Chemical and petrochemical industries �

Energy and power plant technology �

Furnaces, kilns, ovens and boilers �

Oil and gas industries �

Power and utilities �

Pulp and paper �

Connection HeadsImperial Grid 1” x 1”

Tubeskin Types:

TC59 - Tubeskin Thermocouple Assembly

Tubeskin type: V-pad, weld pad or shroud

Mounting method:Longitudinal �

Longitudinal or � right angle (weld pad only)

Sensor Element:

Type K (NiCr-NiAl), �

Type J (Fe-CuNi), �

Type E (NiCr-CuNi), �

Type N (NiCrSi-NiSi) �

Temperature range:0 °C to +1260 °C (depending upon element)

Number of sensors:2-wire single circuit �

4-wire dual circuit �

Classification tolerance:

Class 2 and class 1 �per DIN EN 60584

ISA standard and special �to ANSI MC96.1-1982

Measuring point: Grounded

Electrical approvals: CSA, FM.

Options:

Lengths and diameters to �suit service conditions.

Transmitter mounted �directly within connection head

Calibration - single point �and multiple points

Traceability of the �thermocouple alloys, metal sheath, pad material and mineral insulation (Mill Test Reports standard)

Selectable accuracy �tolerance

Special designs �and materials

Explosion protection: �CSA, FM

Thermocouple �transmitter matching

Close coupled or �remote mounted

Shield for V-Pad �or Weld Pad

Pipe clamp attachment �

Mi-cable weld clamps �

FMAPPROVED

Create your product part number by selecting the appropriate assembly items from each of the categories below. Enter the item code into the applicable box to generate the part number.

TC59Part

NumberTC59-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

1 Tubeskin typeCode

V V-Pad sensor

1 V-Pad sensor with shield [Stainless steel 316 / 316 L (1.4401 / 1.4435)]

2 V-Pad sensor with shield [Inconel® 600 (2.4816)]

3 V-Pad sensor with shield [Stainless steel 310 (1.4841)]

4 V-Pad sensor with shield [Hastelloy® X (2.4665)]

W Weld pad sensor

5 Weld pad sensor with shield [Stainless steel 316 / 316 L (1.4401 / 1.4435)]

6 Weld pad sensor with shield [Inconel® 600 (2.4816)]

7 Weld pad sensor with shield [Stainless steel 310 (1.4841)]

8 Weld pad sensor with shield [Hastelloy® X (2.4665)]

S Shroud sensor

2 Mounting Method

L Longitudinal

R Right angle (weld pad only)

3 Unit of measure

I Imperial

M Metric

4 Electrical approval

C CSA Ex-proof

L CSA Ex-proof Class 1 Division II

M FM Ex-proof Class 1 Division II

F FM Ex-proof

I Ex manufacturers declaration

Z Without

5 Flame path fitting

1 Yes

Z Without

6 Connection head

5 1000 F (Aluminum)

6 1000 S (Stainless steel)

4 8000 W (Aluminum)

7 KN4-A (Aluminum)

B BSZ (Aluminum)

D BSZ-H (Aluminum)

Z Without

7 Cable entry

S 1/2 NPT

F 3/4 NPT

T M20 x 1.5

Z Without

8 Head instrument connection

S 1/2 NPT

F 3/4 NPT

A M24 x 1.5

Z Without

9 Terminal block / Transmitter

1 Crastin terminal block

2 Ceramic terminal block

3 T12 (Programmable Digital Transmitter)

8 T19 (Analogue Transmitter)

6 T32 (HART® Transmitter)

9 T53 (Fieldbus Foundation / PROFIBUS PA Transmitter)

B T91.10 (Analogue Transmitter, DIN form B)

X Without / prepared for transmitter

Y Without / flying leads

10 Neck extension

N Nipple-Union-Gas seal

F Nipple-Union-Nipple

2 Remote mount with electrical cord grip

3 Instrument compression fitting with stainless steel ferrule

4 Instrument compression fitting with Teflon® ferrule

Q Neck tube male threaded, diam. 14 x 2.5 mm (DIN 43772)

Z Without

11 Neck material

G Galvanized steel

S Stainless steel 316 (1.4401)

Z Without

12 Fitting style

B Compression fitting with stainless steel ferrule

P Spring process cover

Z Without

13 Fitting material

A Stainless steel 316 (1.4401)

B Stainless steel 316 Ti (1.4571)

Z Without

6 7 8 9 10 11 12 1354321

Note: Some configurations are unavailable. Your WIKA sales person will notify you if you have made an incorrect selection

14 N-Dimension (N)

Imp

eria

l

010 1.0 inch

030 3.0 inch

040 4.0 inch

045 4.5 inch

050 5.0 inch

055 5.5 inch

060 6.0 inch

080 8.0 inch

100 10.0 inch

120 12.0 inch

140 14.0 inch

Met

ric

025 25 mm

075 75 mm

100 100 mm

112 112 mm

125 125 mm

138 138 mm

150 150 mm

200 200 mm

250 250 mm

300 300 mm

350 350 mm

ZZZ Without

15 Furnace fitting size

1 1/2 NPT

3 3/4 NPT

4 1 NPT

5 1 1/4 NPT

6 1 1/2 NPT

8 2 NPT

F G 1/2 B

Z Without

16 Element

1 Type K (NiCr-Ni) / 0...+1260 °C

5 Type N (NiCrSi-NiSi) / 0...+1260 °C

7 Type E (NiCr-CuNi) / 0...+870 °C

3 Type J (Fe-CuNi) / 0...+760 °C

17 Number of sensors

1 Single

2 Dual

18 Classification tolerance

8 ISA standard to ANSI MC96.1-1982

9 ISA special to ANSI MC96.1-1982

2 Class 2 per DIN EN 60584

1 Class 1 per DIN EN 60584

19 Measuring point

2 Grounded

1 Ungrounded

20 Sensor diameter

1 1/4 inch / 0.250 inch (6.35 mm)

8 3/8 inch / 0.375 inch (9.53 mm)

4 3/16 inch / 0.188 inch (4.75 mm)

D 6.0 mm

E 8.0 mm

R 10.0 mm

21 Sheath material

P Stainless steel 316 / 316 L (1.4401 / 1.4435)

O Stainless steel 310 (1.4841)

J Inconel® 600 (2.4816)

T Stainless steel 446 (1.4762)

I Hastelloy® X (2.4665)

U Pyrosil® D

22 Pad material

P Stainless steel 316 / 316 L (1.4401 / 1.4435)

O Stainless steel 310 (1.4841)

J Inconel® 600 (2.4816)

T Stainless steel 446 (1.4762)

I Hastelloy® X (2.4665)

U Pyrosil® D

23 Lead wire insulation

B Armoured Teflon®

A Armoured fibreglass

G Teflon® armour over Teflon®

D PVC armour over Teflon®

E Teflon® armour over fibreglass

T Teflon® jacket

H Fibreglass jacket

Z Without

24 W-Dimension (W)

***** Please specify (e.g. 84 mm = 00084) (e.g. 9.5 inch = 00095)

ZZZZZ Without

25 A-Dimension (A)

***** Please specify (e.g. 84 mm = 00084) (e.g. 9.5 inch = 00950)

26 Pipe / Tube diameter

**** Please specify (e.g. 84 mm = 0084) (e.g. 9.5 inch = 9500)

ZZZZ Without

27 Weld clamp bracket

** Quantity (specify 01 to 99)

ZZ Without

28 Weld clamp bracket material

P Stainless steel 316 / 316 L (1.4401 / 1.4435)

O Stainless steel 310 (1.4841)

J Inconel® 600 (2.4816)

T Stainless steel 446 (1.4762)

I Hastelloy® X (2.4665)

U Pyrosil® D

29 Certificates

1 Quality certificates

Z Without

30 Additional order details

T Additional text

Z Without

Note: For materials not listed,

a drawing with the specified

material alloys can be provided.

16 18 20 22 25 2614 15 17 19 23 24 27 28 29 3021

Tubeskin Result ComparisonBelow are the results of a computer simulated comparison between a Weld Pad, V-Pad and Shroud sensor.

Features: The patented V-Pad design includes a machined v-shaped block that is welded to the mineral insulated cable. Features of the V-Pad include:

Material compatibility for various service conditions. �

Compaction of the mineral insulation inside �of the v-pad protects the measuring junction from radiant temperature influences.

No special machining of the contact block �is required to match the tube profile.

Thermocouple junction welded into the base of the v-pad. �

The narrow v-shaped block allows a full penetration weld �between the junction and tube surface. This eliminates potential air gaps and substantial measurement inaccuracies.

V-pad block is designed to minimize the conducted �heat influence from the mi-cable.

Fast temperature response behaviour combined with reliability. �

Designed to limit the influence of high radiant �temperature at the measuring point.

Higher accuracy can be achieved with the �addition of an optimized shield.

The Shroud Sensor has a shield incorporated into its design. Features of the Shroud Sensor include:

The shroud sensor is filled with ceramic cement �creating a large insulation factor.

The shroud sensor is contoured to match the tube geometry. �

The shroud sensor is designed to minimize any air space �between the ceramic surface of the shroud and tube surface.

Thermocouple junction has an interference fit with the �tube surface when the shroud is welded in place.

Only single pass welding is required during installation. �

A clamp attachment is available when welding is not an option. �

The Weld Pad is an inexpensive design with the following features:

Less accurate than the Shroud and V-Pad designs �while maintaining similar repeatability.

Designed for flat or curved surfaces. �

The pad is notched to match the mi-cable diameter. �This allows the thermocouple junction to be in close proximity to the measuring surface.

A shield option is available for greater accuracy. �

Compact design allows for ease of installation �when there are space limitations.

Pad can incorporate any mi-cable diameter. �

A continuous single-pass weld from the pad to �the tube surface is sufficient for attachment.

Weld pads can be mounted longitudinal or �right angled to the pipe surface.

We encourage our customers to discuss the items included in the design criteria with our technical sales people. We can advise our customers on each of the items, based on our experiences with other customers. Unfortunately, we are not able to give specific recommendations on these topics since each application is unique.

Tubeskin Application Data SheetThis enables WIKA specialists to assist the customers in specifying their tubeskin sensors.

This helps us to maintain a database of the type of applications where we are supplying tubeskin sensors worldwide

*Shield must be filled / compacted with ceramic fiber insulation.

**These results are based on specific furnace conditions. Each Application must be evaluated independently.

Design Criteria:This list is presented to customers to help formulate an installation plan for V-Pad temperature sensors. We feel the items listed below must be considered at the planning stage by the end user to ensure a functional and reliable final product.

V-Pad (or Block)

Material Compatibility with Furnace Tube �

Welding Procedure [GTAW (Prefered)] �

Heat Transfer (radiation, convection, conduction) �

Mounting Block (location, orientation) �

Junction (Grounded Standard)

Contamination of Thermocouple Wire �

Temperature Cycling �

Operating vs. Design Temperatures �

Sheath

Wall Thickness and Diameter (flexibility vs. durability) �

Bending Radius �

Expansion Loop (location and design) �

Path to Furnace Wall (flame impingement) �

Weld Clips �

Cutting and Sealing �

Gas Seal

Feed-Through Design at Furnace Wall �

Strain Relief (on lead connections) �

Transition

Connecting flexible wire �

Instrument Connection

Heat Transfer to Connection Head �

Bending Stress (When head supported by MI Cable only) �

Connection Head

Material �

Temperature Limits �

Terminal Strip �

Tubeskin Result ComparisonBelow are the results of a computer simulated comparison between a Weld Pad, V-Pad and Shroud sensor.

Features: The patented V-Pad design includes a machined v-shaped block that is welded to the mineral insulated cable. Features of the V-Pad include:

Material compatibility for various service conditions. �

Compaction of the mineral insulation inside �of the v-pad protects the measuring junction from radiant temperature influences.

No special machining of the contact block �is required to match the tube profile.

Thermocouple junction welded into the base of the v-pad. �

The narrow v-shaped block allows a full penetration weld �between the junction and tube surface. This eliminates potential air gaps and substantial measurement inaccuracies.

V-pad block is designed to minimize the conducted �heat influence from the mi-cable.

Fast temperature response behaviour combined with reliability. �

Designed to limit the influence of high radiant �temperature at the measuring point.

Higher accuracy can be achieved with the �addition of an optimized shield.

The Shroud Sensor has a shield incorporated into its design. Features of the Shroud Sensor include:

The shroud sensor is filled with ceramic cement �creating a large insulation factor.

The shroud sensor is contoured to match the tube geometry. �

The shroud sensor is designed to minimize any air space �between the ceramic surface of the shroud and tube surface.

Thermocouple junction has an interference fit with the �tube surface when the shroud is welded in place.

Only single pass welding is required during installation. �

A clamp attachment is available when welding is not an option. �

The Weld Pad is an inexpensive design with the following features:

Less accurate than the Shroud and V-Pad designs �while maintaining similar repeatability.

Designed for flat or curved surfaces. �

The pad is notched to match the mi-cable diameter. �This allows the thermocouple junction to be in close proximity to the measuring surface.

A shield option is available for greater accuracy. �

Compact design allows for ease of installation �when there are space limitations.

Pad can incorporate any mi-cable diameter. �

A continuous single-pass weld from the pad to �the tube surface is sufficient for attachment.

Weld pads can be mounted longitudinal or �right angled to the pipe surface.

We encourage our customers to discuss the items included in the design criteria with our technical sales people. We can advise our customers on each of the items, based on our experiences with other customers. Unfortunately, we are not able to give specific recommendations on these topics since each application is unique.

Tubeskin Application Data SheetThis enables WIKA specialists to assist the customers in specifying their tubeskin sensors.

This helps us to maintain a database of the type of applications where we are supplying tubeskin sensors worldwide

*Shield must be filled / compacted with ceramic fiber insulation.

**These results are based on specific furnace conditions. Each Application must be evaluated independently.

Design Criteria:This list is presented to customers to help formulate an installation plan for V-Pad temperature sensors. We feel the items listed below must be considered at the planning stage by the end user to ensure a functional and reliable final product.

V-Pad (or Block)

Material Compatibility with Furnace Tube �

Welding Procedure [GTAW (Prefered), SMAW] �

Heat Transfer (radiation, convection, conduction) �

Mounting Block (location, orientation) �

Junction (Grounded Standard)

Contamination of Thermocouple Wire �

Temperature Cycling �

Operating vs. Design Temperatures �

Sheath

Wall Thickness and Diameter (flexibility vs. durability) �

Bending Radius �

Expansion Loop (location and design) �

Path to Furnace Wall (flame impingement) �

Weld Clips �

Cutting and Sealing �

Gas Seal

Feed-Through Design at Furnace Wall �

Strain Relief (on lead connections) �

Transition

Connecting flexible wire �

Instrument Connection

Heat Transfer to Connection Head �

Bending Stress (When head supported by MI Cable only) �

Connection Head

Material �

Temperature Limits �

Terminal Strip �

INSTALLATION INSTRUCTIONS FORV-PAD THERMOCOUPLES AND SHIELDS

IntroductionThe following is a guide for installation of V-Pad thermocouples. It gives guidelines and suggestions for preparation, installation, welding, and shielding V-Pad thermocouples. Due to the variety of applications some of the suggestions made here may not be appropriate. The end user must determine if these instructions are suitable for their unique application.

Welding ProcessGas Tungsten Arc Welding (GTAW) is the suggested welding process due to its relatively clean weld. Small diameter filler rod and tungsten (1/16" [1.5 mm], 3/32” [2.4mm] OD) gives the best penetration, especially for the root pass. Always use good basic welding practice. Proper installation is a major step in the success of a V-Pad installation. Although the V-Pad is one of the most rugged sensors available it can be destroyed by improper welding. WIKA can supply V-Pad test thermocouples on request for practice welding if required.

Before You StartCheck to ensure there is enough mineral insulated cable to reach the termination box for each V-Pad, especially if on-site bending is required. Avoid passing mineral insulated cable through hot zones. Route the mineral insulated cable thermocouple close to cool surfaces. This will substantially increase the life expectancy. Ensure all surfaces to be welded are cleaned by appropriate methods. When grinding always use clean abrasive materials that have not been used on other materials. Test fit the V-Pad thermocouple at the desired location to ensure adequate length of mineral insulated cable was provided. Ensure all bending is correct and sufficient allowance is provided for tube expansion.

Always use an appropriate tube bender for the corresponding diameter of mineral insulated cable. If bending by another means then use bends with radius equal to or greater than those on a tube bender.

Based on the customer’s weld procedure, determine the appropriate preheat, interpass and weld filler metal composition for the parent materials. Also determine if controlled cooling or post weld heat treatment is required.

V-Pad WeldingClamp the V-Pad (using a chain clamp or similar) to the appropriate location on the pipe. Ensure there is good line contact with the pipe (see Figure 1). Avoid tilting the V-Pad and ensure the edge makes good contact with the pipe (see Figure 2).

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Continued on page 2...

00132, Rev1, 02/2009

Page 2

Ensure good axial alignment with the pipe axis (see Figure 4). This will ensure any differential expansion of the mineral insulated cable is smooth and does not bind with the weld clips. Preheat the area to be welded (including the V-Pad) as appropriate for the materials. Tack weld one end of the V-Pad. Visually check alignment before proceeding with the root pass. Watch for tilt, gap, line contact, etc.

Apply the root pass on both sides. Melt into the first root pass for complete penetration (see Figure 3). Note that the maximum wall thickness of the V-Pad is 0.06" [1.5mm]. Avoid melting through the V-Pad wall. Check interpass temperatures and add additional passes as required to fill the joint. Usually three passes per side are required. Control cooling rate of the weld area if required.

Clip WeldingAttach clips at predetermined locations. Preheat area before welding if required. Weld clip ends only and ensure there is a loose fit (no friction) between the mineral insulated cable and the clip (see Figure 5). The clip should allow axial expansion of the mineral insulated cable. Weld clips on the same plane as the sensor approximately 6” [150mm] to 12” [300mm] from the shield then every 6’ [1.5m] of run (see figure 6).

TestingTest the thermocouple circuit. See ASTM E-1350 for a complete procedure for testing thermocouples. Perform any nondestructive examination or heat treatment at this time if required.

ShieldingShielding has been shown to significantly improve the sensor accuracy. For applications where only trending of the tube skin temperatures is required, shields are not necessary and have no significant benefit. For measuring actual tube skin temperatures shields are a must.

Shields are installed after the V-Pad is fully welded. Fill the shield with an appropriate fibrous ceramic material suitable for the temperatures to be expected on the shield surface (see Figure 6). The temperature of the insulation material will be several hundred degrees Celsius higher than the tube skin temperature. Do not compress the insulation in the shield.

Preheat the area for welding if appropriate for the materials. Place the shield over the V-Pad sensor and locate as shown and tack weld to hold the shield in place. Place a 1/16" [1.5mm] fillet weld on all sides of the shield as shown (see figure 6). Do not weld over sensor opening.

NOTE: If any spaces are present, the ceramic fiber will eventually deteriorate and migrate through the gaps thus leaving a lower insulation factor and a greater error in the temperature measurement.

See Pages 3 and 4 for Figures 1 to 6.

00132, Rev1, 02/2009

Page 3

FIGURE 1 - LINE CONTACT

FILLETWELD

POOR LINE CONTACT POOR LINE CONTACT GOOD LINE CONTACT

POOR ALIGNMENT GOOD ALIGNMENT

FIGURE 2 - TILT

GAP

FIGURE 3 - WELD PENETRATIONPOOR (GAP TOO LARGE) GOOD

FIGURE 4 - AXIAL ALIGNMENT

POOR ALIGNMENT GOOD ALIGNMENT

FIGURE 5 - CLIP WELDING

00132, Rev1, 02/2009

MI CABLE

WELD

Page 4

FIGURE 6 - SHIELD INSTALLATION

FILLET WELD(2 SIDES)

FILLETWELD

HEAT SHIELD REMOVED HEAT SHIELD INSTALLED

V-PADWELD CLIP 6“ [150mm] to 12" [300mm] (max)

HEAT SHIELD

1 1/2"[38mm]

MI CABLE

SECTION VIEW

CERAMIC FIBERINSULATION

CERAMIC FIBERINSULATION

00132, Rev1, 02/2009

INSTALLATION INSTRUCTIONS FORWELD PAD THERMOCOUPLES AND SHIELDS

1.0 Prepare furnace tube or pipe by grinding surface to remove all oxidation and foreign matter (at any area of attachment of weld pad, heat shield, or weld clips).

2.0 Place thermocouple pad in position ensuring the contour of the weld pad conforms with the pipe/tube contour. Positive contact between the weld pad and pipe/tube will achieve best temperature measurement results. Clamp weld pad to pipe/tube using a chain clamp.

3.0 Weld thermocouple pad to pipe/tube using 1/8” [3.2mm] fillet weld on all three uninterrupted sides (See Figure 1). Route thermocouple to cooler (opposite) side of pipe/tube (See Figure 4).

4.0 Before welding the heat shield, make sure the shield void is tightly packed with ceramic fiber (Kaowool) (See Figure 3). Place the heat shield over the thermocouple weld pad ensuring it is centered with the pad, and the shield does not touch the sides of the weld pad. Tack weld in position, then continuously fillet weld all areas where shield is in contact with pipe/tube (See Figure 2).

NOTE: If any spaces are present, the ceramic fiber will eventually deteriorate and migrate through the gaps thus leaving a lower insulation factor and a greater error in the temperature measurement.

5.0 Weld supporting clips on the same plane as the sensor approximately 6“ [150mm] 12” [300mm] from the shield then every 6’ [1.8m] of run (See Figure 3).

NOTE: For alternate surface temperature measurement, using single step installation (no shield required), please request WIKA Instruments patented V-Pad Tube Skin Style Thermocouple information.

See Page 2 for Figures 1 to 4.

Page 100131, Rev1, 02/2009

6“ [150mm] to12” [300mm] (max)

FIGURE 1 FIGURE 2

FILLETWELD(3 SIDES)

FILLETWELD

FIGURE 3

FIGURE 4

CERAMIC FIBERINSULATION

WELD CLIP

HOTJUNCTION

COOLSIDE

FILLETWELD

Page 200131, Rev1, 02/2009

INSTALLATION INSTRUCTIONS FORSHROUD SENSOR THERMOCOUPLES

IntroductionThe following is a guide for installation of the Shroud Sensor. It gives guidelines for preparation, installation, and welding. Some of the suggestions made here may not be appropriate. The end user must determine if these instructions are suitable for their particular application.

Welding ProcessGas Tungsten Arc Welding (GTAW) is the suggested welding process due to its relatively clean weld. Small diameter filler rod and tungsten (1/16" [1.5mm] or 3/32” [2.4mm] OD) gives the best penetration, especially for the root pass. Limit the electrode size to 3/32” [2.4mm] maximum.

Before You StartCheck to ensure there is enough mineral insulated cable to reach the termination box for each Shroud Sensor, especially if on-site bending is required.

Avoid passing mineral insulated cable through zones with excessive heat or flame. Keep the mineral insulated cable thermocouple close to cool surfaces. This will substantially increase the life expectancy.

Ensure all surfaces to be welded are cleaned. When grinding always use clean abrasive materials.Test fit the Shroud Sensor at the desired location to ensure adequate length of mineral insulated cable is available.

Ensure all bending is correct and allowance is provided for expansion. Use expansion loops where appropriate. Always use an appropriate tube bender for the corresponding diameter of mineral insulated cable. Avoid bends with a radius less than a standard tube bender. Use the largest possible bend radius.

WeldingDetermine the appropriate preheat, interpass and weld filler metal composition for the parent materials. Determine if controlled cooling or post weld heat treatment is required.

Clamp the Shroud Sensor to the pipe. A chain clamp should be used to temporarily secure the Shroud Sensor before welding. Check axial alignment with the pipe axis (see Figure 2).

Preheat the area to be welded when required. Check alignment before proceeding with the weld. Watch for gaps, line contact, alignment, etc. Perform the weld all around the shroud (Figure 1). Note that the wall thickness of the shroud is about 3/32" [2.4mm]. Avoid melting through the shroud wall. Only one fillet weld pass is required. Control the cooling rate of the weld area if required.

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00133, Rev1, 02/2009

Page 2

NOTE: Clamp brackets can be used as an alternate method of mounting. Please contact your sales representative for more information.

Clip WeldingAttach saddle clips at appropriate locations to support the MI cable. Preheat area before welding ifrequired.

Weld the clip ends only and ensure there is a loose fit (no friction) between the mineral insulated cable and the clip (see Figure 3). The saddle clip should allow for axial expansion of the mineral insulated cable.

TestingSee ASTM E-1350 for a complete procedure for testing thermocouples. Perform any nondestructive examination or heat treatment, if required.

See Page 3 for Figures 2 & 3.

00133, Rev1, 02/2009

FILLETWELD

SHROUD SENSOR (WELDED) SHROUD SENSOR (CLAMPED)

FIGURE 1: INSTALLATION

Page 3

FILLETWELD

FIGURE 2 - AXIAL ALIGNMENT

POOR ALIGNMENT GOOD ALIGNMENT

FIGURE 3 - CLIP WELDING

00133, Rev1, 02/2009

MI CABLE

WIKA INSTRUMENTS LTD.

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As the world’s leader for pressure and temperature instrumentation, WIKA Instruments Ltd. combines Canadian manufacturing with WIKA’s global network of production sites, subsidiaries and distributors to deliver the most extensive product line in the industry. Other WIKA manufacturing facilities are in Germany (head office), Switzerland, Brazil, South Africa, Poland, China, India and the US.

For more than 50 years WIKA has been recognized for being innovative and supplying quality products. Annually, WIKA produces more than 30 million instruments worldwide. Currently, there are more than 300 million WIKA measuring devices in use.

WIKA’s dedication to improving products and services is seen in continuous product engineering and development. The results are the highest quality, longest lasting instruments available designed to meet our customers’ requirements.

To find out more aboutWIKA Instruments

and our productscall us at

(780) 463-7035 or visit ourwebsite at

www.wika.ca

WIKA Instruments Ltd.1, 885 Memorial DriveFort McMurray, AB T9K 0K4Tel: (780) 791-9995Fax: (780) 743-2296

WIKA Instruments Ltd.#1, 2679 Bristol CircleOakville, ON L6H 6Z8Tel: (905) 337-1611Fax: (905) 337-2716

WIKA Instruments Ltd.4932 - 52nd Street, SECalgary, AB T2B 3R2Tel: (403) 237-5960Fax: (403) 264-0095

WIKA Instruments Ltd.#3, 1355 Confederation St.Sarnia, ON N7S 4T2Tel: (519) 344-1339Fax: (519) 344-3824

WIKA Instruments Ltd.2366 Avenue C NorthSaskatoon, SK S7L 5X5Tel: (306) 664-1105Fax: (306) 244-4084

WIKA Instruments Ltd.#204, 9804 - 100 AvenueGrande Prairie, AB T8V 0T8Tel: (780) 357-0386Fax: (780) 357-0389

WIKA Instruments Ltd.9912 Lougheed HwyBurnaby, BC V3J 1N3Tel: (604) 299-3855Fax: (604) 299-4566

WIKA Instruments Ltd.9335 Rte TranscanadienneSt.Laurent, QC H4S 1V3Tel: (514) 332-0330Fax: (514) 332-4292

WIKA Instruments Ltd.3018, Du HibouQuebec City, QC G1C 8E2Tel: (418) 952-7779Fax: (418) 666-7272

WIKA Instruments Ltd.Head Office3103 Parsons RoadEdmonton, AB T6N 1C8Tel: (780) 463-7035Fax: (780) 462-0017

WIKA Instruments Corp.Electrical Temperature Division950 Hall CourtDeer Park, TX 77536Tel: (713) 475-0022Fax: (713) 475-0011