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Technical Manual MT 188-E
WARNINGS
GENERAL WARNINGS
The equipment described in this manual is a device subject to pressure
installed in systems under pressure.
The involved equipment is usually embedded in systems conveying
flammable gases (e.g. natural gas).
WARNINGS FOR THE OPERATORS
Before performing the installation, commissioning or maintenance, the
operators must:
go through the safety provisions applicable to the installation
where they have to operate;
obtain the necessary authorizations to operate, when required;
be equipped with the necessary personal protective
equipment (helmet, goggles, etc.)
make sure that the area in which they have to operate is
equipped with the required collective protections as well as
with the necessary safety signs.
PACKAGING
The packaging materials used for transporting the equipment and the
related spare parts have been designed and manufactured to avoid
damages during normal transport, storage, and related handling.
Therefore, the equipment and spare parts must be kept in their
respective original packages till their installation in the final destination
site. When the packages are opened, it is necessary to verify the
integrity of the materials therein contained. In case of damages, report
the detected damages to the suppliers preserving the original package
to allow the performance of necessary inspections.
HANDLING
The handling of the equipment and its components must be performed
after having established that the lifting means are suitable for the loads
to be lifted (lifting capacity and functionality).
When necessary, the handling of the equipment must be performed
using the lifting points foreseen on the equipment itself. The use of
motorized means is reserved to authorized personnel only.
INSTALLATION
The installation of the device must occur in compliance with the
provisions (laws or regulations) in force in the place of installation.
In detail, natural gas plants must show features complying with the law
provisions or regulations in force in the place of installation or at least
complying with the standards EN 12186 or EN 12279 - more
specifically, the paragraphs 6.2, 7.5.2, 7.7, and 9.3 of the standard EN
12186 and 6.2, 7.4, 7.6, and 9.3 of the standard EN 12279 must be
observed. The installation in compliance with such standards
minimizes the risk of fire and the formation of potentially hazardous
atmospheres.
The equipment is not provided with internal pressure limitation devices;
therefore, it must be installed making sure that the operating pressure
of the assembly in which it is installed does never exceed the value of
maximum allowable pressure (PS).
Therefore, the user, when he deems it necessary, shall provide for the
installation of suitable pressure limitation systems on the assembly.
Moreover, the user shall equip the plant with suitable relief or drain
systems in order to be able to discharge the pressure and the fluid
contained in the plant before proceeding with any inspection and
maintenance activity.
Should the installation of the equipment require the installation on site
of compression fittings, these latter have to be installed following the
instructions provided by the manufacturer of the fittings. The selection
of the fittings must be compatible with the use specified for the
equipment and with the plant specifications, when available.
COMMISSIONING
The commissioning must be carried out by suitably trained
personnel.
During the commissioning, the personnel not strictly necessary must
be kept away and the limited access area must be properly marked
(signs, barriers, etc.).
Verify that the equipment calibrations are the ones required. If
necessary, restore the required values for the same as provided for
later on in this manual.
During the commissioning, the risks determined by any discharges to
the atmosphere of flammable or noxious gases must be assessed.
In case of installation on natural gas distribution networks, it is
necessary to consider the risk of formation of a (gas/air) explosive
mixture inside the piping.
COMPLIANCE WITH DIRECTIVE 97/23/EC (PED)
The slam-shut valve SBC 187 is classified as pressure accessory
pursuant to Directive 97/23/EC (PED).
The slam-shut valve SBC 187 with pressure switch tripping in case of
maximum pressure is classified as safety accessory pursuant to the
PED Directive and, therefore, it can be used as both a pressure
accessory and a safety accessory, always pursuant to the PED
Directive.
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