Instructions Acc. To Directive 97/23/Ec, Pressure Devices - ABB FMT400-VTS Operating Instruction

2.2.4
2.2.4.1 General
• The thermal mass flowmeters FMT400 -VT, -VTCS and the pipe components:
– wafer flange version,
– flange version with integrated partial measuring section and
– weld-on adapter
have been designed, produced and approved in accordance with Directive 97/23/EC for pressure devices.
• The declaration of conformity can be found in the appendix.
• The "FMT400-VT, -VTCS" measuring systems are intended to be used for flow measurement of gaseous
media, only.
• The device may be used for the specific application and under the conditions specified in the order confirma-
tion, only. Otherwise, the device may be impaired, damaged or even destroyed.
• Only those media (fluids) may be measured which – according to the state of the art or the operator's experi-
ence – do not affect the chemical or physical material properties of process-wetted parts that are essential for
operational reliability.
• The threshold for changing stress reversals has been taken from the AD-2000 Leaflet S1, Section 1.4, and
was neither calculated nor checked by us.
• The device must be included in the routine maintenance procedure of the plant and checked accordingly.
• The used materials must be checked by the user for compatibility with the respective application.
• The max. temperature and pressure specified on the rating plate must not be exceeded.
• Prior to mounting or dismounting the pipe components or transducers always make sure that the pipe is fully
depressurized (except when using an easy-change fitting for mounting/dismounting a transducer).
• Prior to starting any installation work on pipes with aggressive, toxic, irritant or noxious substances always
rinse the pipes carefully. When working on the pipes observe the applicable regulations for the prevention of
accidents.
• Do not use damaged pipe components or transducers. Such units must be withdrawn immediately and re-
turned to the vendor for repair.
• Dismounted pipe components or transducers that have been in contact with aggressive, toxic, irritant or nox-
ious substances must be cleaned thoroughly and wrapped and marked accordingly when they are returned to
the vendor.
• If a leakage should occur at a measuring point, the respective point must be put out of service.
• Immediately replace defective gaskets or O-ring seals. Do not re-use.
• Mechanically marking or making alterations to pipe components or sensors can lead to damage to the
components and is thus prohibited. For weld-on adapters, cutting to length and welding on to the pipe are per-
mitted.
• Damage to hot tap fittings due to external fire must be prevented by the system operator.
2.2.4.2 Mounting/Dismounting the pipe component
• When mounting the pipe components, make sure that the flow direction is in accordance with the marking.
• Observe the respective welding regulations when welding in a weld-on adapter. Do not apply more heat than
absolutely necessary to avoid that the sealing face of the mounting flange gets distorted.
• When mounting a pipe component insert a flat flange gasket between the two pipe flanges. The gasket must
be intact and resistant to the conducted substances.
• Prior to mounting always check the pipe component or transducer incl. the gaskets for possible damage.
• Make sure that the pipe components are not twisted when they are mounted.
• Use the appropriate screws with the required strength and dimensions for screwing the flanges together.
• Fasten the flange screws evenly and with the appropriate torque specified for the built-in gasket.
• After mounting the pipe components, close the insertion pipe with an appropriate blind flange with gasket, or
close the existing stop valve, if applicable.
42/14-36 EN Thermal Mass Flowmeter FMT400-VTS, FMT400-VTCS (Sensyflow VT-S/VT-CS)
Application according to designation, general safety instructions

Instructions acc. to Directive 97/23/EC, pressure Devices

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