I&C “project packages” confused me a lot when I started.
They’re actually simple once you see how they fit into the plant. 
In detail engineering, an I&C project package is basically:
A piece of equipment (often skid-mounted) 
+ all its instruments 
and control logic 
that come as one “mini-system” from a vendor.
Examples: compressor packages 
, pump skids 
, boilers 
, water treatment units 
, etc.
Most of these packages originate in other disciplines (Process 
, Mechanical 
, Electrical 
).
But they still need I&C input for:
Control philosophy
Instrument selection and ranges
Signals to DCS/PLC and safety systems 
Read Full Article HEre: 
Instrumentation and Control Project Packages - Detail Engineering
Why it matters: INTERFACES. 
If we don’t define who does what, gaps show up during installation or commissioning 
.
That’s where “battery limits” 
and “scope of supply” come in:
Scope of supply = what the vendor must deliver (instruments , junction box , local panel , cables 
on skid…)
Battery limits = the physical boundary of that scope. Inside: vendor’s responsibility. Outside: project’s responsibility (power , instrument air 
, cables to main panels, etc.).
For beginners, a quick checklist to clarify early with the vendor:
Which instruments are in the package? Which are by others?
Where are the battery limits for cables , tubing 
, power , air , signals 
?
What signals go to DCS/PLC and to safety (ESD/PSD) systems ?
Who provides and programs the local control panel/PLC ?
If you’re working on a package right now, drop it in the comments 
. Curious what you’re dealing with.
#Instrumentation #ControlSystems #ICEngineering #ProcessAutomation #EngineeringProjects