Welding Process - WIKA TC59-X Betriebsanleitung

6. Commissioning, operation
6.4 Tests/Checks
Test loop resistance of the thermocouple circuit at ambient temperature prior to welding/
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routing the XTRACTO-PAD
After completing the welding/routing of the XTRACTO-PAD
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resistance at ambient temperature and compare.
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If a deviation of greater than 5 % between readings occurs, please contact WIKA.
Perform any non-destructive examination or heat treatment as required.
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Ensure adequate tube wall thickness at the weld locations. This can be checked by
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thickness testing to customer specifications.

6.5 Welding process

Gas Tungsten Arc Welding (GTAW) is the suggested welding process due to its relatively
clean weld. During welding operation, the requirements of the relevant material data
sheets and the applicable directives and standards must be considered regarding the
heat treatment, filler rods or welding procedures. Proper installation is a major step in the
success of a XTRACTO-PAD
6.6 XTRACTO-PAD
Locate the guide channel at the appropriate location on the tube.
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Weld the guide channel to the tube.
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Use 3.2 mm (1/8") fillet weld to weld 3 sides using one continuous pass (see figure 1).
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WARNING!
Do not weld the end where the sheath leaves the XTRACTO-PAD
6.7 XTRACTO-PAD
Position the heat shield with the closed end approximately 12.5 mm (1/2") from the end
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of the thermocouple.
Use 3.2 mm (1/8") fillet weld to weld the heat shield to the tube on 3 sides using one
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continuous pass (see figure 1).
6.8 XTRACTO-PAD
Insert the sensor into the heat shield opening and ensure it bottoms out inside the guide
channel.
WARNING!
Ensure thermocouple tip is fully inserted into the guide channel prior to attaching
tube clips. Mark the sensor for insertion length, if necessary.
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, record results.
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installation.
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guide channel welding
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shield welding
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sensor
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WIKA operating instructions model TC59-X (XTRACTO-PAD
to the tube, test loop
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.
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