5. Commissioning and operation
5. Commissioning and operation
Personnel: skilled personnel
EN
Check the instrument for any damage that may have been caused.
In the event of any damage, do not commission the instrument and contact the
manufacturer immediately.
5.1 Mounting
Thermowells / Protection tubes are delivered free from oil and grease (exception: carbon
steels). Depending on the application, the end user must check whether additional
cleaning is required before installation.
The thermowell / protection tube 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 /
protection tube as a result of the plant operation or the manager. If necessary, one of the
thermowell/pipeline mountings mentioned below (e.g. with pipe clamps) 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 / protection tube centred, 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 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 - Hygienic Welding of stainless steel tubing in the food
■
processing industry
EHEDG Guideline 9 - Welding stainless steel to meet hygienic requirements
■
EHEDG Guideline 8 - Hygienic design principles, 6.3
■
10
WARNING!
Physical injuries and damage to property and the environment
caused by hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene, flammable
or toxic substances) or harmful media (e.g. corrosive, toxic, carcinogenic,
radioactive), there is a danger of physical injuries and damage to
property and the environment.
Should a failure occur, hazardous media with extreme temperatures
(over 55 °C [131 °F]) may be present at the instrument.
▶
For these media, in addition to all standard regulations, the appropri-
ate existing codes or regulations must also be followed.
WIKA operating instructions protection tube, model TW61