Installing The Valve Into The Pipeline; Testing The Installed Valve - Samson 3349 Mounting And Operating Instructions

Installation
5.4 Installing the valve into the
pipeline
NOTICE
!
Risk of valve damage due to work being
carried out by personnel not qualified for
such tasks.
The plant operator or specialist company
performing the welding is responsible for the
selection of the welding procedure and the
actual welding operations on the valve. This
also applies to any required heat treatment
to be performed on the valve.
Î Only allow qualified welding personnel
to carry out welding operations.
NOTICE
!
Premature wear and leakage due to insuffi-
cient support or suspension.
Î Support or suspend the valve sufficiently
at suitable points.
1. Close the shut-off valves in the pipeline
at the inlet and outlet of the plant section
while the valve is being installed.
2. Prepare the relevant section of the pipe-
line for installing the valve.
3. Remove the protective caps from the
valve ports before installing the valve.
4. Lift the valve using suitable lifting equip-
ment to the site of installation (see sec-
tion 4.3.2). Observe the flow direction
through the valve. The arrow on the
valve indicates the direction of flow.
32
5. Completely retract the actuator stem to
protect the plug from sparks during weld-
ing.
6. Weld the valve free of stress into the
pipeline.
7. Attach a support or suspension on the
valve, if necessary.

5.5 Testing the installed valve

DANGER
!
Risk of bursting due to incorrect opening of
pressurized equipment or components.
Valves and pipelines are pressure equipment
that may burst when handled incorrectly.
Flying projectile fragments or the release of
process medium under pressure can cause
serious injury or even death.
Before working on the control valve:
Î Depressurize all plant sections affected
and the valve (including the actuator).
Release any stored energy.
Î Drain the process medium from all the
plant sections concerned as well as the
valve.
WARNING
!
Risk of personal injury due to pressurized
components and process medium being
discharged.
Î Do not loosen the screw of the test con-
nection while the valve is pressurized.
EB 8048-21 EN