4.6 COMMISSIONING AND START-UP
4.6.1 GENERAL RECOMMENDATIONS
Before proceeding with the commissioning of equipment is important:
1) Verify if the equipment is correctly installed according to recommendations of this manual.
2) Close the inlet, outlet, by-pass valves, when applicable, of each stream.
3) Open the downstream vent valve of last regulator installed in the respective stream.
4) Certify that the Skid is depressurized.
ATTENTION:
* Under no hypotheses proceed with stream pressurization where the equipment is installed by
downstream valve.
* Under no hypotheses proceed with depressurization of stream where the equipment is installed
by the last valve located upstream the equipment, as filter drain, for example.
5) Verify if all connectors are properly installed before proceed with stream pressurization.
6) Verify if all equipment are installed adequate to the process conditions, through information provided in the
equipment nameplate.
7) Verify if the SSV (slam shut valve) is closed.
The SSV are released to the field calibrated, however, because of transport conditions and handling of
equipment its set point can be changed.
Then, it Gascat recommends to check the using external pneumatic source connected directly in
the actuator, before proceeding the stream pressurization.
The regulator model Argos is not supplied adjusted. It tends to preserve the life time of internal
parts. So that it is necessary to adjust the regulator prior to operation.
The configuration of Pressure Regulating Skid shall be according to DIN EN 12186 / NBR 12712 and other
standards where it will be installed.
4.6.2 COMMISSIONING (SINGLE REGULATOR - STREAM)
Utilizing as reference the scheme showed in item 4.5.1, proceed with the descriptive indicate for commissioning of
pressure regulator model ARGOS in a single stream, considering that all recommendations of item 4.6.1 were
already observed.
The procedure considers the utilization of slam shut valve model GIPS-FC GASCAT as safety device.
1) Close the vent valve.
As the slam shut valve is closed it is necessary to utilize the vent to simulate a low flow and then proceed with
regulator adjustment before align the stream.
2) Verify if the regulating spring of pilot is with no charge (with no charge).
Releasing the spring the valve will stay closed during pressurization.
3) Verify if the restrictor installed in the pilot inlet, loading sensing line, is opened between 30%~70%.
4) Open SLOWL AND GRADUALLY the inlet ball valve of Skid, or when the skid is adopted of by-pass in the
ball valve utilize it to pressurize the stream.
5) As there is no pressure upstream the regulator the slam shut valve is blocked (fail close type). Keep the by-
pass or push button (located in the SSV body) to pressurize the line between the slam shut valve and the
pressure regulator.
To Next Page
Loading...