Commissioning and Startup Training Curriculum

Mod 2 - MC & Punch Lists

Module from the Commissioning and Startup Training Curriculum curriculum.

Module 2 — Mechanical Completion & Punch Lists · Learning Objectives · 1. Execute system-by-system mechanical completion walkdowns. · 2. Classify punch list items per A/B/C severity and assign closure responsibility. · 3. Manage the punch list database through clearance, transfer, and closeout. · 4. Sign off MC certificates with correct supporting documentation. · 5. Recognize common MC delays and apply mitigation strategies. · Punch List Categorization

Category	Definition	Impact	Timing
A	Must correct before system energization/pressurization	Safety / Operability	Before Pre-Comm start
B	Must correct before startup but not blocking pre-comm	Startup readiness	Before feed-in
C	Cosmetic / non-critical	Aesthetic / minor	After startup, in 90 days
MC Walkdown Checklist — Piping
Item	Check	Reference
Line class conformance	Spec-break tagged, correct material	P&ID / line list
Slope / pocket	Gravity drains, no pockets where spec requires	Isometric
Supports / shoes	Installed, correct offset	Support drawing
Spring hangers	Pin in travel stop	Spring table
Blinds / spades	Correct orientation, per P&ID	P&ID
Vents / drains	Present, capped, tagged	P&ID
Insulation	Correct thickness, jacket intact	Spec
PWHT records	Hardness surveys done for CrMo	WPS / PQR
MC Walkdown Checklist — Vessels / Columns
Item	Check
Internals installed	Trays, packing, demister per internals drawing
Manway closure	All bolts torqued, gaskets correct
Relief valves	Tag, set pressure, seal, inlet/outlet orientation
Nozzle projection	Within tolerance, no interference
Ladder / platform	Welded, grated, toe-boards in place
Nameplate	Installed, legible
NDE records	Final UT/RT per code stamp
Common MC Delays
Cause	Mitigation
Missing vendor data books	Require MDR at 90% progress
Instrument cabling not dressed	Schedule electrical finish trails pipe
Late arrival of small-bore piping	Expedite with second source
Insulation not complete	Split-box insulation to commissioning scope
Relief valve bench test delayed	Use spare certified valves
MC Certificate — Required Attachments
Document	Source
Redlined P&ID	Construction markup
Punch list with signoffs	Punch list database export
NDE summary	QC records
Hydrotest package	Ready for Mod 4
PWHT / heat-treat records	QC
Weld map / heat number traceability	QC
Vendor data books	EPC document control
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Source: Commissioning_and_Startup_Training_Curriculum_v1.xlsx · Sheet: Mod 2 - MC & Punch Lists

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