WIKA TW61 - Manual (Page 12)

11593963.03 03/2014 GB/D/F/E
12 WIKA operating instructions thermowell, model TW61
GB
5. Transport, packaging and storage
5.1 Transport
Check the thermowell for any damage that may have been caused by transport.
Obvious damage must be reported immediately.
5.2 Packaging
Do not remove packaging until just before mounting.
Keep the packaging as it will provide optimum protection during transport (e.g. change in
installation site, sending for repair).
5.3 Storage
Permissible conditions at the place of storage:
■ Storage temperature: 0 ... 70 °C
■ Humidity: 35 ... 85 % relative humidity (no condensation)
WARNING!
Before storing the thermowell (following operation), remove any residual media. This
is of particular importance if the medium is hazardous to health, e.g. caustic, toxic,
carcinogenic, radioactive, etc.
6. Commissioning, operation
CAUTION!
Before commissioning the thermowell, clean the plant in accordance with the
cleaning specifications.
The thermowell must not be bent or altered in order to mount it. The fitting should be carried
out such that there can be no damage to the thermowell as a result of the plant operation or the
operator. If necessary, one of the thermowell/pipeline mountings mentioned below (e.g. using a
pipe clamp) will be required. In particular, the neck should be secured by appropriate methods
against bending.
Version for orbital welding
In the orbital welding version, the TW61 is directly welded into the pipeline. Weld the thermowell
centered, without axial offset (without irregularities), orbitally in the pipeline.The weld joint should
therefore be made with appropriate care and in line with the applicable and accredited welding
procedures and tested. Likewise, the requirements of the 97/23/EC pressure equipment directive
should be followed.
For general information on the design of a hygienic weld, we recommend the following
documents (among others):
■ EHEDG guideline 35 - Welding of stainless steel tubing in the food industry
■ EHEDG guideline 9 - Welding stainless steel to meet hygienic requirements
■ EHEDG guideline 8 - Hygienic equipment design criteria, 7.5
■ 3-A ® sanitary standard for sensors and sensor fittings, number 74-06, D 6.1.4
5. Transport, packaging and storage / 6. Commissioning, ...