A lock on a disconnect means nothing without a documented procedure, a verified zero-energy check, a signed name on the tag and a record the OSHA inspector can find in under two minutes. Clipboards lose all four. LOTO software holds them automatically against the asset, the energy sources and the authorized employee — so the lock on the deck matches the record in the audit book. OXMAINT AI is the AI-powered CMMS and maintenance management software that runs the full 29 CFR 1910.147 chain — procedure library, isolation point register, group-lockout box, verification record and annual audit — on one platform.
LOCKOUT TAGOUT · INDUSTRIAL SAFETY SOFTWARE · OSHA 1910.147 · 2026
Lockout Tagout (LOTO) Software for Industrial Safety
The hard part of LOTO isn't buying locks — it's keeping the written procedure, the energy-source list, the verification record and the named employee all pointing at the same equipment on the same shift. The OXMAINT AI software holds every procedure per asset, every lock per authorized employee, and every verification timestamped to OSHA 1910.147.
EElectrical
MMechanical
HHydraulic
PPneumatic
CChemical
TThermal
GGravity
7
hazardous energy sources must be isolated under OSHA 29 CFR 1910.147
Annual
periodic inspection of each procedure required by 1910.147(c)(6)
Top-10
LOTO consistently ranks top-10 in annual OSHA citations — mostly for missing procedures
1
zero-energy verification step is the one most often skipped and most often cited
The Seven Hazardous Energy Sources
1910.147 doesn't allow "we locked out the electrical" to count as full isolation. Every energy source that could reasonably reactivate the equipment must be identified, isolated and verified. OXMAINT AI holds the energy-source list per asset — so the procedure is complete, not just electrical — schedule a walkthrough of the energy-source register in OXMAINT AI.
ELECTRICAL
Line power, backup power, UPS, battery banks, PV inverters. Isolate at disconnect; verify with meter.
MECHANICAL
Flywheels, rotating shafts, springs under compression. Block, chock or pin to a known safe position.
HYDRAULIC
Accumulators, cylinders, pressurized lines. Isolate, bleed to zero, verify at gauge.
PNEUMATIC
Compressed air supply, receivers, cylinders. Isolate, bleed, verify at gauge.
CHEMICAL
Process lines, steam-driven chemistry, storage pressure. Isolate with blinds; drain and flush.
THERMAL
Hot surfaces, steam lines, cryogenic. Allow cool-down or warm-up to safe range before entry.
GRAVITY
Suspended loads, raised platforms, counterweights. Block, pin or lower to grade before work.
The Six-Step LOTO Sequence — Every Time, Every Asset
OSHA 1910.147(d) prescribes the shutdown and lockout sequence. OXMAINT AI holds the sequence as the actual workflow — the next step cannot start until the previous one has a timestamped signoff from the authorized employee.
01
Prepare for shutdown
Identify the equipment, the authorized employee, the specific energy sources, and the correct isolation points per the written procedure.
02
Notify affected employees
Operators and anyone in the area are informed before isolation begins. Operator sign-off captured on the record.
03
Shutdown by normal means
Equipment is stopped using its normal operating controls before any isolation device is operated.
04
Isolate every energy source
Each isolation point on the procedure is operated — electrical disconnect open, valves closed, lines blinded, accumulators bled.
05
Apply lock and tag
The authorized employee applies their personal lock and tag to every isolation device. One employee, one key, one record.
06
Verify zero-energy state
Try-to-start, meter, gauge or physical check that the equipment cannot operate. Verification result recorded against the procedure.
Group Lockout — The Lock Box That Keeps Everyone Honest
When several crew members work under one isolation, the group-lockout box is how accountability stays with each person. Every authorized employee applies their personal lock to the box; the box key holds the isolation locks. Nobody re-energizes while any personal lock is still on the box. OXMAINT AI mirrors the box in software, so the "who still has their lock on" question is one query, not a shift walkaround.
GROUP LOCKOUT BOX · LINE 3 OVERHAUL · LIVE
Isolation locks (held by key)
Main disconnect DS-301
Hydraulic valve V-14 (bled)
Steam block V-22 (blind)
Mech brake pin applied
Personal locks on box
R. Patellead mechanicapplied 06:14
A. Martínezelectricianapplied 06:18
J. Okaforpipefitterapplied 06:21
T. Nguyenhelperremoved 11:42
A Lock on a Disconnect Is Not a Procedure.
OSHA cites plants not because the lock is missing but because the procedure, the verification, the periodic audit or the energy-source list is. The OXMAINT AI software holds all four as the actual workflow — so the lock on the deck is backed by the record in the book.
The Compliance Evidence Locker
1910.147 doesn't ask whether you did LOTO — it asks for the evidence. Five records per asset per event. If any one is missing, the citation is written. OXMAINT AI retains all five automatically against the asset and the authorized employee.
01 · WRITTEN PROCEDURE
Equipment-specific written LOTO procedure listing every energy source, isolation point, device and verification step. 1910.147(c)(4).
02 · AUTHORIZED EMPLOYEE
Name of the trained, authorized employee who performed the lockout, with current training records attached. 1910.147(c)(7).
03 · ISOLATION & VERIFICATION
Timestamped record of each isolation point operated and the zero-energy verification method and result. 1910.147(d).
04 · GROUP LOCKOUT ROSTER
Full list of authorized employees whose personal locks were applied and removed, with timestamps. 1910.147(f)(3).
05 · ANNUAL AUDIT RECORD
Documented periodic inspection of each procedure by an authorized employee not involved in that lockout. 1910.147(c)(6).
The Three Procedure States That Decide an Audit
On an OSHA audit, every procedure is in one of three states — and only one of them is a clean finding. OXMAINT AI holds the state per procedure in the register, so the gap is visible before the inspector finds it.
COMPLIANT
Written procedure current; authorized employee trained; isolation list complete; annual audit on file within the last 12 months.
AUDIT DUE
Procedure in place but annual audit older than 12 months — schedule the periodic inspection this cycle.
GAP
No written procedure, missing authorized employee, or incomplete energy-source list — the citation shape.
How OXMAINT AI Runs LOTO
The procedure library, energy-source register, authorized-employee list, group-lockout mirror and annual-audit scheduler all live natively in the OXMAINT AI maintenance management software — spin up a free account and set up your first LOTO procedure in OXMAINT AI.
Procedure Library
Written LOTO procedures per asset with every energy source, isolation point and verification step — the 1910.147(c)(4) record.
Authorized Employee Roster
Trained-and-authorized employees held with training dates — lockout cannot be issued to a lapsed employee.
Mobile Lockout Execution
The six-step sequence filed from a phone next to the asset — each step signed and timestamped on the record.
Group-Lockout Box Mirror
Every personal lock on the physical box has a digital twin in the software — "who is still on" is one query.
Verification Record
Try-to-start, meter and gauge results captured with the authorized employee's signature — the most-cited gap, closed.
Annual Audit Scheduler
Periodic inspection auto-scheduled per procedure under 1910.147(c)(6) — nothing drifts past 12 months unnoticed.
Frequently Asked Questions
What is the most common OSHA LOTO citation?
Does the software replace the physical lock?
No. The physical lock, hasp, and tag still go on the equipment — the software holds the written procedure, the authorized-employee signoff and the verification record that make the lock legally valid.
How does group lockout work in the software?
Every authorized employee's personal lock on the physical group-lockout box has a digital counterpart in OXMAINT AI. Isolation locks cannot be released from the record until every personal lock has been removed and signed off.
How fast can we have LOTO procedures digitized?
Most plants have 50-100 priority asset procedures loaded in two to three weeks. Energy-source lists and verification steps come straight from the existing written procedures — no re-writing.
Match the Lock on the Deck to the Record in the Book.
Put every LOTO procedure, every authorized employee and every verification on the OXMAINT AI maintenance management software — 1910.147 chain in full, annual audits auto-scheduled, group-lockout box mirrored, evidence locker ready for the inspector who walks in Thursday.
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