94 FLOWSIC100 Flare · Operating Instructions · 8013344/11L2/V 2-5/2018-10 · © SICK Engineering GmbH
Assembly and Installation
Subject to change without notice
3.3.1.3 Weld on nozzles for retractable sender/receiver units and drill out the pipeline
Weld on the nozzles for retractable sender/receiver units in the same manner as described
previously for non-retractable sender/receiver units and determine the distances D1 and
D2 for cross-duct versions.
For use of retractable sender/receiver units ball valves have to be installed. Ball valves are
installed after finishing nozzle welding. Check and ensure gas tightness of ball valve
installation before you continue.
Drilling holes into the pipeline if plant is out of operation
The pipe wall must be drilled out at the nozzle position so that the sender/receiver unit can
be inserted into the pipeline (
→
pg. 86, § 3.3.1).
● Only once on each nozzle.
● Have this work done by skilled persons specially qualified for this work.
Drilling holes into the pipeline if plant is in operation (hot tap)
● Only once on each nozzle.
● This work requires special tools (e.g. special drilling tool) and special technical
knowledge.
● The hole cutter diameter must be 46 ... 48 mm for 2“ nozzles and 73 ... 75 mm for 3”
nozzles.
● Mount the drilling tool on the ball valve. Check for installation. Open the ball valve and
drill out the holes in the pipeline in the centre of the nozzle position.
● Retract the drilling tool. Dismount drilling tool after ball valve is closed again.
● Mount a blind flange on the ball valve as long as no sender/receiver unit is installed.
WARNING: Hazards through leaks!
Operation in leaky condition is not allowed and possibly dangerous.
Danger by explosive, toxic and hot gas!
NOTICE:
● Any welding and installation work on pipelines may only be carried out by
authorized personnel with a specific qualification.
● Special qualified and approved procedures have to be followed. This proce-
dure requires the written agreement by the plant operator (
→
pg. 11, § 1.2.1).
● Inspection of welded seams and all other installation regarding correctness
and pressure tightness need to be made. The general safety requirements
and all other plant operator instructions have to be followed (see notice
→
pg. 91, § 3.3.1.2).
WARNING: Hazards during hot tapping!
When sender/receiver units are installed on the pipeline when the pipeline is in
operation (hot tapping):
Only have this work done by skilled persons qualified for hot tapping.
Comply with all legal, general and company-internal regulations.
Only start installation work when all planned measures have been checked
and approved by the plant operator.
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