Simrad SC90, Installation Manual

Page: 92 / 544

90
419050/B
Installing the mounting flange
The mounting flange must be mounted so that its top mating surface is in parallel with
the sea surface during normal operating conditions. The transducer dock on top of the
gate valve must remain vertical during the same conditions.
Prerequisites
This task must take place in dry dock. The
shipyard must provide all necessary tools
and manpower. The following specific
items are required for this task:
• Lifting arrangement
• Welding equipment
Note
The mounting flange is heavy. Always use
appropriate lifting equipment to minimize
risk of personnel injury or equipment
damages. Only certified equipment must
be used.
Context
Only the basic steps of the task are offered. Additional procedures with more information
and/or details must be provided by the installation shipyard to fit the vessel properties.
The top mating surface of the mounting flange must be protected with a wooden cover at
all times until the gate valve is installed. It is very important that this surface is clean and
undamaged, because it must be watertight after the gate valve has been installed.
Note
The quality of the welding is critical to the safety of the vessel. Welding must only be
done by a certified welder. Always wear the personal protective equipment. Observe
and obey the relevant safety instructions.
The final installation work must be approved by the vessel’s national registry, the
corresponding maritime authority and/or classification society.
Procedure
1 Define the physical location of the mounting flange.
This location must be carefully selected. The decision must be based on the general
principles outlined in chapter
Preparations and all relevant knowledge about the
vessel construction.
Simrad SC90 Installation Manual