Mechanical completion checklist: free MC walkdown template (Excel and PDF)
Deskely Completions team Singapore
Before a subsystem is certified mechanically complete, construction, commissioning and usually the client walk it together and check that it is built, inspected and documented to the design. The mechanical completion checklist is the record of that walkdown.
This page gives you a free MC checklist in Excel and PDF, with checks by discipline, a punch sheet that counts A and B items, and the sign-off.
- One checklist per subsystem, walked against the subsystem boundary drawings.
- Check the documents first: A ITRs signed, test packs closed, redlines up to date.
- Every finding is a punch item. MC is signed with zero category A items open.
- Construction, commissioning and the client sign; exceptions are listed, not hidden.
What the MC walkdown checks
| Section | Typical checks |
|---|---|
| Attendance | Construction, commissioning, QC, HSE and the client or owner's representative present, with the subsystem boundary drawings and tag list. |
| Documentation | All A ITRs signed, test packs closed and reinstated, flushing records, vendor installation records, redlines marked up, preservation up to date. |
| Piping and mechanical | Installed to isometrics, supports complete, spring hanger stops removed, insulation and coating complete or punched, equipment aligned and grouted, guards fitted. |
| Electrical | Cables glanded, terminated and labelled, IR tested, earthing and bonding complete, Ex equipment inspected, enclosures sealed. |
| Instrumentation | Instruments installed to hook-up drawings, tubing complete and leak tested, tags fitted, cables terminated. |
| Safety | Access and escape routes clear, handrails and gratings complete, safety equipment installed, signs and labelling in place. |
The criteria come from your project completions procedure and the ITP. On the Norwegian shelf, NORSOK Z-007 (Mechanical completion and commissioning) is a common reference. See the mechanical completion guide for MC criteria by discipline.
The template
Each check has a status (yes, no or not applicable) and a punch reference where it fails. The punch sheet logs each item with its category, discipline and owner, and the summary counts open A and B items, so the sign-off block shows at a glance whether MC can be signed.
Punch and the MC decision
| Category | Effect |
|---|---|
| A | Must be closed before MC is signed. |
| B | Does not stop MC; carried into commissioning and closed before start-up or handover. |
Projects use their own letters and rules, and some add C. Agree the categories before the walkdown starts, so the argument is about the item and not about the category. See the punch list template.
From checklist to certificate
When the A punch is closed, the mechanical completion certificate is signed with the checklist, the punch list and the document register attached. Care of the subsystem then passes to commissioning, and pre-commissioning begins with the pre-commissioning checklist.
In Deskely, every ITR, test pack and punch item is held against its tag and subsystem, so what still blocks MC is visible live and the certificate is checked against the records before it is signed.
The Deskely products for this
Frequently asked questions
What is a mechanical completion checklist?
The record of the MC walkdown for one subsystem: checks on documentation, piping and mechanical, electrical, instrumentation and safety, with the punch items found and the sign-off.
Who attends an MC walkdown?
Construction, commissioning, quality and usually the client or owner's representative, often with HSE and discipline specialists.
Can MC be signed with open punch items?
With category B or C items, yes, if they are listed and agreed. Not with open category A items.
What documents are needed for mechanical completion?
The signed A ITRs, closed and reinstated test packs, flushing and IR records, vendor installation records, redlines and the punch list for the subsystem.
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