Introduction
IS 17893:2023 Work Permit System is India’s national standard for implementing a safe and effective Permit to Work (PTW) system in industrial workplaces. This guide explains every permit type, roles, responsibilities, gas testing requirements, PPE, permit validity, and practical implementation.
If you have ever worked in a refinery, chemical plant, power station, or any industrial facility in India, you have almost certainly come across a “work permit” before touching a valve, lighting a torch, or climbing a ladder. That small piece of paper — or these days, a digital form — stands between a routine maintenance job and a catastrophic accident.
In June 2023, the Bureau of Indian Standards (BIS) released IS 17893:2023 — Work Permit System: Code of Practice, prepared by the Chemical Hazards Sectional Committee (CHD 07). For the first time, India has a single, unified national standard that lays down exactly how a Permit to Work (PTW) system should be designed, issued, executed, audited, and closed. Before this standard, most plants relied on internal company procedures, checklists borrowed from other organizations, or guidance from bodies like the Atomic Energy Regulatory Board (AERB) and various state Factories Act directorates. IS 17893:2023 pulls all of that experience together into one code of practice.
This article is a complete, easy-to-understand walkthrough of the standard — written for EHS professionals, safety officers, plant engineers, shift supervisors, contractors, and students who want to understand not just what the standard says, but why each requirement exists and how it plays out on the shop floor. We will cover every major clause, explain technical jargon in plain language, add real-world examples, and finish with practical FAQs.
What Is a Work Permit and Why Does It Matter?
A work permit is a formal, written authorization that allows a specific person or team to carry out a specific job, at a specific location, during a specific time window, under a defined set of safety precautions. Think of it as a safety contract between the person who controls the area (the issuer) and the person who will actually do the work (the acceptor or executor).
According to IS 17893:2023, a work permit serves several purposes at once:
- It gives a structured risk assessment checklist so nothing gets forgotten.
- It highlights residual hazards — the dangers that remain even after precautions are taken.
- It spells out the precautions needed to do the job safely.
- It fixes accountability — who authorized the work and who is responsible for keeping the workplace safe.
- It becomes an official record once the job is closed, useful for audits and incident investigations.
In short, a work permit converts an unwritten “go ahead, it’s fine” into a documented, accountable, and auditable process.
Scope of IS 17893:2023
The standard covers seven categories of work permits:
| Sl No. | Permit Type | Typical Use Case |
|---|---|---|
| 1 | Cold Work Permit | Painting, scaffolding erection, insulation work |
| 2 | Hot Work Permit | Welding, grinding, gas cutting, open flames |
| 3 | Confined Space / Vessel Entry Permit | Entering tanks, reactors, sewers, pits |
| 4 | Excavation Permit | Digging trenches, road cutting, pit digging |
| 5 | Electrical Work Permit | Work on power-driven equipment requiring isolation |
| 6 | Work at Height Permit | Any work at or above 1.8 m |
| 7 | Radiography Permit | Industrial radiography using X-ray/gamma sources |
The permit system is meant to apply to all restricted areas of a plant or unit. However, the standard also lists specific activities where a work permit is not required, provided the facility in-charge has demarcated or approved the area/activity. Understanding these exemptions is just as important as understanding when a permit is needed, because over-issuing permits for trivial activities can dilute the seriousness of the system.
Activities That Do NOT Require a Work Permit
- Routine welding/cutting done inside designated workshop areas approved by the facility in-charge.
- Routine sampling for laboratory analysis.
- Canteen cooking and food preparation activities.
- Torches, furnaces, and sparking equipment already located in approved laboratory zones.
- Garbage collection from specified safe locations.
- Cold jobs inside office or control room buildings (but electrical isolation, height work, or excavation in these same areas does need a permit).
- Visual inspection of rotary or static equipment by maintenance/inspection staff.
- Replacement of indoor tube lights (verbal permission from shift in-charge is enough) — though replacing bulbs on poles inside plant areas or on roads still needs a permit.
- Manual gardening activities like grass cutting with hand tools (but powered lawnmowers, hacksaw machines, or tree climbing above height/excavation limits still need permits).
- Any other routine activity specifically exempted by the facility in-charge through a formal notification.
Practical tip: Keep a written, approved list of these exemptions displayed at the site. This avoids confusion among new contractors or transferred employees about what genuinely needs a permit.
Downloadable Work Permit Formats (Editable Word Templates)
All seven work permit formats given in IS 17893:2023 are available below as ready-to-use, editable Word (.docx) templates. Click “Download” against any permit to get the Google Drive link.
| Sl No. | Work Permit Name | Annexure Reference (IS 17893:2023) | Download Link (Word Format) |
|---|---|---|---|
| 1 | Cold Work Permit | Annex A | Download (.docx) |
| 2 | Hot Work Permit | Annex B | Download (.docx) |
| 3 | Confined Space / Vessel Entry Permit | Annex C | Download (.docx) |
| 4 | Excavation Permit | Annex D | Download (.docx) |
| 5 | Electrical Work Permit | Annex E | Download (.docx) |
| 6 | Work at Height Permit | Annex F | Download (.docx) |
| 7 | Radiography Permit | Annex G | Download (.docx) |
The General Procedure for Work Permits
Step-by-Step Flow
- Risk assessment first. Before any paperwork begins, the issuer and acceptor jointly walk the job location and assess the hazards.
- Request initiation. Either the issuer (usually the shift in-charge of the operating area) or the acceptor (the person who will actually execute the job) can request the permit.
- Filling the permit. The issuer and acceptor decide together on the specific procedures, preparations, and PPE needed.
- Approval. The permit is signed by the issuer, and — depending on the type of work — a plant Head of Department (HOD) or area in-charge.
- Execution. The acceptor carries out the job strictly within the conditions written on the permit.
- Monitoring. Area operators and shift in-charges keep watch and can stop work if conditions change.
- Closure. Once the job is done, the permit is signed off by all responsible parties, and the area is restored to a safe condition.
The Triplicate Copy System
A key administrative feature of the standard is that every work permit must be made in triplicate:
| Copy | Who Holds It | Purpose |
|---|---|---|
| 1st Copy | Acceptor/Executor | Displayed at the job site so everyone knows work is in progress; available for audit |
| 2nd Copy | Issuer | Retained for control of ongoing work activities and record-keeping |
| 3rd Copy | Safety Department | Retained for the safety department’s records |
This three-way distribution ensures transparency: anyone walking through the plant can see a permit posted at a job site, the issuer maintains oversight of everything happening in their area, and the safety department has an independent record for audits.
Key People Involved
The standard defines several roles, each with distinct responsibilities:
- Issuer — usually the shift in-charge; controls the entire permit process and is an employee of the company (never a contractor). No one can issue a permit to themselves.
- Acceptor / Executor — the person or contractor supervisor who carries out the work and is accountable for safe execution.
- Area In-charge / Plant HOD — provides higher-level authorization, particularly for hot work, confined space, and excavation permits.
- Area Operator / Technician — verifies conditions at the equipment level, signs the permit before work starts, and again before closing.
- Gas Tester / Gas Safety Inspector (GSI) — conducts and certifies atmospheric testing.
- Maintenance Technician / Contractor Supervisor — receives the permit from the executor and directly supervises workers on the ground.
Risk Assessment Before Filling the Permit
Before any details are written on the form, IS 17893:2023 requires the issuer and acceptor to jointly agree on:
- Specific procedures to be followed while doing the job.
- Preparations required before the job actually starts (isolation, draining, ventilation, etc.).
- Special needs, such as personal protective equipment (PPE).
If work needs to continue beyond the approved hours, it must be renewed or extended by the appropriate authority based on job type. And critically — work can be stopped at any moment if conditions become unsafe or deviate from what the permit specifies. This “stop work authority” is one of the most powerful safety tools in the whole system, and every worker, not just supervisors, should feel empowered to use it.
Understanding Each Type of Work Permit
1. Cold Work Permit (Annex A)
Cold work is any activity unlikely to generate enough heat to ignite flammable gases. It sounds low-risk, but the standard still treats it seriously because “cold” doesn’t mean “harmless” — a scaffolding collapse or an unisolated line can hurt just as badly as a fire.
Typical cold work examples: – Erecting or removing scaffolding – Insulating pipelines or equipment – Painting below 50°C (note: pressure spray painting is reclassified as hot work because of static/spark risk) – Instrument troubleshooting that doesn’t touch process isolation – Equipment greasing and lubrication – Condition monitoring of rotating machinery – Tests performed by maintenance or external agencies
Key checklist items before issuing (Table 1 of Annex A):
| Item | Purpose |
|---|---|
| Equipment/work area inspected | Confirms the job site is genuinely ready |
| Surrounding area checked, cleaned, covered | Prevents secondary hazards |
| Equipment blinded/disconnected/isolated | Ensures energy sources are cut off |
| Equipment drained and depressurized | Prevents unexpected release |
| Equipment electrically isolated and tagged | Cross-references the electrical permit number |
Residual hazards checklist includes: lack of oxygen, combustible gases, toxic gases, steam condensate, pyrophoric iron, corrosive chemicals, and any other identified hazard.
Validity: A cold work permit is valid for 8 hours (one shift) unless renewed, and can be extended up to a maximum of 7 calendar days before a fresh permit is required.
2. Hot Work Permit (Annex B)
Hot work is any activity that produces heat or sparks capable of igniting flammable or combustible material.
Typical hot work examples: – Welding, grinding, soldering, brazing, gas cutting, chipping with spark-producing tools – Hacksaw cutting on hydrocarbon-service equipment – Equipment that once contained explosive, corrosive, or toxic material being moved to a hot-work-approved area – Using non-flameproof electronics (cameras, mobile phones) in hazardous areas – Power-driven tools like pneumatic breakers or internal combustion engines inside hazardous zones – Online leak sealing involving drilling or welding – Work near radioactive sources or uninsulated high/low tension power cables within 3 m
Permit Types under Hot Work:
| Permit Type | Use Case |
|---|---|
| Normal | Routine day-to-day hot work |
| Shut Down | Work carried out during planned plant shutdowns |
| Blanket | Covers multiple related activities over a longer duration (up to 30 days) |
Gas testing requirements are central to hot work safety:
| Parameter | Permissible Limit |
|---|---|
| Oxygen content | Minimum 19.5% (above 23% indicates dangerous oxygen enrichment) |
| Hydrocarbon content | Zero % LEL (Lower Explosive Limit) |
| Toxic content | Below the Threshold Limit Value (TLV) of the relevant chemical |
Gas tests must be conducted before issuing the permit and repeated just before starting the hot job, and again at every renewal.
Special conditions for confined space hot work / vessel entry: – Minimum two trained attendants must be present at the manhole. – Continuous inert gas monitoring, adequate ventilation, and a trained rescue attendant with SCBA (self-contained breathing apparatus) are mandatory. – Vessel entry with no hot work is allowed only if combustible gas levels stay below 5% LEL (or 20% LEL if entry is with an air-supplied mask), oxygen is at least 19.5%, and toxic gases are below threshold limits.
Validity: Normally 7 calendar days; up to 15 days during plant shutdown; blanket permits up to 30 days.
3. Confined Space / Vessel Entry Permit (Annex C)
A confined space is an area not designed for continuous human occupancy, large enough for a person to physically enter, but with limited or restricted means of entry/exit. It may or may not be fully enclosed.
Examples of confined spaces: tanks, columns, reactors, oil/water sewer pits, coolers, condensers, storage tanks, sumps, trenches, furnaces, flare stacks, boiler drums, HVAC ducts, false ceilings, and floating roof tank decks.
Why confined spaces are dangerous: – Accumulation of toxic or flammable gas/vapour – Presence of inert gas displacing breathable air – Oxygen deficiency (below 20% by volume) – Flooding by liquid or steam – Difficult access, making rescue harder
Pre-entry checklist highlights (Annex C):
| Category | Requirement |
|---|---|
| Energy isolation | Pumps/lines blinded, disconnected, or blocked; electrical LOTO (Lockout-Tagout) applied |
| Ventilation | Mechanical (air eductor/flameproof type) or natural, as applicable |
| Gas testing | Portable gas tester checked for health; continuous monitoring where needed |
| PPE | Full body harness with lifeline, SCBA/airline, retrieval equipment, dust respirator |
| Standby | Trained standby attendant always present at the entry point |
| Illumination | Only 24V flameproof hand lamps allowed inside confined spaces; 230V lamps strictly prohibited |
Attendance and gas testing records: The standard mandates a formal attendance sheet tracking every person’s entry and exit time, and a subsequent gas test log recorded until conditions are confirmed safe (Table 11 and Table 13 of Annex C).
Golden rule: No confined space permit shall be issued until the pre-entry checklist requirements are fully complied with, and “OK to Enter” tags are displayed only after preparation is verified.
4. Excavation Permit (Annex D)
Any excavation of ground or soil below 30 cm requires a dedicated excavation permit.
Permit types: Normal, Shutdown, and Construction.
Key data captured on the form: – Exact location (in-plant area, tank dyke, along pipeway/cable way, across road, open ground, drainage flume, etc.) – Size of excavation (depth, width, length in metres) – Purpose, commencing and expiry date/time – Executing department and contractor details
Associated permits/safety requirements checklist (Table 14): cold work permit, hot work permit, confined space permit (if depth exceeds 1.2 m), hand excavation only, warning signs, flashing lights, barricading, shoring, battering sides to 45° or less, fire extinguishers, access provisions, keeping excavated soil at least 1 m from the edge, body harness/lifeline, and gumboots/safety suits.
Underground services clearance: Before excavation, the standard requires a systematic check (D-17 to D-24) confirming the presence or absence of underground power cables, telecommunication cables, firewater lines, oil/sewer lines, drinking water lines, computer cables, product/utility lines, instrument cables, and cathodic protection cables — with separate permission and precautions recorded for each.
Key numeric safety rules:
| Depth | Requirement |
|---|---|
| 1 m or more | Sides must be sloped or braced to prevent collapse |
| 1.2 m or more | Confined space entry permit required; ladders needed at least every 30.48 m of trench length |
| 1.5 m or more | Barricading with red/white bands or self-glowing boards required |
| Up to 1.5 m in operating areas | Mechanical excavation prohibited — manual excavation only |
Validity: Normally 7 days with shift-wise renewal; up to 15 days for shutdown units; up to 30 days for construction activities. The excavation clearance (a prerequisite document, not the permit itself) is valid for 15 days generally, or 1 month at construction sites.
5. Electrical Work Permit (Annex E)
Electrical work requires positive isolation of electrical energy before anyone touches power-driven equipment. This permit format is structured differently from the others — built around de-energization and re-energization clearance certificates.
Three-part certificate structure:
| Part | Purpose |
|---|---|
| Part I | De-energization — filled when equipment is being isolated |
| Part II | Re-energization — filled when equipment is restored to service |
| Part III | Office copy retained by the operation-in-charge department |
De-energization checklist highlights: – Confirm equipment is not in operation – Isolate all back-feeding circuits – Switch off control supply and space heater supply – Perform LOTO (Lock Out Tag Out) on the breaker/MCC – Physically rack out the breaker
Re-energization checklist highlights: – Check IR (insulation resistance) value of cable/equipment – Ensure all temporary safety grounds are removed – Confirm breaker internals are undamaged – Rack the breaker back into service position – Switch control and space heater supplies back on
Numbering convention: Clearance certificates follow the format “XXX/ZZZZ/YY” — a three-digit book number, a four-digit clearance number, and the last two digits of the year — ensuring every certificate is traceable.
Important safety instruction: Switching off and isolating the space heater circuit is mandatory alongside de-energizing a motor, unless Electrical Maintenance specifically requests in writing to keep it ON (this protects windings from moisture damage in some designs, so the exception is deliberate, not accidental).
6. Work at Height Permit (Annex F)
Required for any work at or above 1.8 m. This is one of the most detailed annexes in the standard because falls from height remain a leading cause of industrial fatalities.
What this permit authorizes: Provision of safe access, platform, or working arrangement at height for the job — essentially certifying that the means of reaching and standing at height is safe, separate from the job itself.
Pre-permit compliance checklist (F-8) covers: – Scaffold checked and certified by a scaffold supervisor, tagged with a green card – Weekly re-certification of scaffolds – Erection on firm ground with sole and base plates – Hanging baskets tested and certified – Cat ladders/crawling boards for sloped roofs – Edge protection against falls
Risk assessment checklist (F-9) covers: – Toe boards and guardrails with barricaded area below – Safety harness and lifeline arrangements – Illumination of the raised work surface – Proximity to unguarded shafts, excavations, or hot lines – Collective fall protection (safety nets) – Standard aluminium ladder access
Fall protection thresholds:
| Height | Requirement |
|---|---|
| 1.8 m and above | Work at height permit mandatory |
| 2.0 m and above | Full body safety harness with lifeline mandatory; medical fitness certificate required |
Medical fitness certificate: Uniquely, this annex requires a registered medical practitioner’s certificate confirming the worker is free from vertigo, epilepsy, fits, giddiness, and other height-related medical risks before they are allowed to work at 2.0 m or above.
Key terminology clarified by the standard:
| Term | Meaning |
|---|---|
| TRAP | A gap of 1 inch or more in the scaffold platform |
| TRIP | A projecting object on the work platform (e.g., overlapping boards) |
| SLIP | An oily or slippery scaffold floor |
| FALL | Absence of fall prevention measures like guardrails/toe guards |
Pre-erection scaffold checklist (Table 21) requires inspection of foundation, standards (vertical posts), ledgers, transoms, bracing ties, fittings, ladders, guardrails, and toe-boards — with re-inspection every seven days by the contractor.
7. Radiography Permit (Annex G)
Used specifically for industrial radiography on pipelines and equipment using X-ray or gamma-ray sources (Ir-192 or Co-60 are named explicitly).
Unique features of this permit: – Must be issued by the area in-charge and registered at the Fire Station. – Only a supervisory employee under whom the radiography contractor works can issue it — an added layer of control given the radiation hazard. – Validity is for single use only, with the specific duration mentioned on the permit itself — unlike other permits that allow multi-day renewal.
Radiation exposure control instruments checklist:
| Instrument | Purpose |
|---|---|
| Collimator | Restricts and directs the radiation beam |
| Radiation survey meter | Measures radiation levels in real time |
| Film badge | Records cumulative worker exposure |
| Concrete wall barrier | Physical shielding |
| Pocket dosimeter | Personal real-time exposure tracking |
| Alarm/Lamp | Warns personnel when the source is active |
Cordon-off distance is decided by the Radiological Safety Officer (RSO) based on source strength, occupancy factor, and workload — there’s no fixed universal number because it depends on the specific job.
Regulatory link: The standard references the Atomic Energy (Radiation Protection) Rules, 2004, and defines a “Level-2 holder” as the Radiological Safety Officer qualified under Rule 22 of those rules.
Best practice noted in the standard: Radiography should preferably be carried out when occupancy is lowest — typically night shifts or planned downtime — to minimize the number of people near the radiation source.
Isolation and Blinding — The Backbone of Safe Work
Section 4 of the standard (clause 4.1.4) goes into significant depth on how process isolation should be achieved, because incomplete isolation is one of the most common root causes of industrial accidents.
Five recognized isolation methods:
- Closing the isolation valve tight and keeping the drain/vent valve open between the equipment and the isolation valve.
- Closing double block valves with the bleed system in between kept open.
- Closing the isolation valve tight and inserting a blind of matching classification (this is called positive isolation).
- Physically disconnecting the pipeline and blinding the open (live) end.
- Closing the motor-operated valve (MOV) and isolating power supply to its drive motor.
Important distinction: Methods 1 and 2 (simple valve closure) are considered unreliable and must never be used alone for hot work, confined space entry, or hazardous chemical services. For these higher-risk jobs, positive isolation by slip blinding or physical disconnection is mandatory.
Every isolation point must carry a “DO NOT OPERATE” tag, and a proper log of tagging and de-tagging must be maintained. Removing these tags is only permitted after the job is fully complete and the permit is closed.
PPE Requirements Under the Standard
Section 5 lists a baseline of mandatory PPE for all employees in work areas:
- Safety helmet
- Safety goggles
- Hand gloves
- Safety shoes
On top of this baseline, the issuer specifies additional PPE depending on the specific hazards of the job:
| PPE | When Required |
|---|---|
| Face shield | Protection against chemical/hazardous substance splash |
| Ear protection | High-noise work areas |
| Full body double-lifeline safety harness | Working at 1.8 m+ on unprotected structures or fragile roofs |
| PVC suit (with/without hood) | Protection from chemical splash |
| Aluminized glass fibre suit | Protection from excessive heat/fire |
| PVC suit/hood with airline | Contaminated atmosphere work |
| Cold suit | Work in cryogenic or very low-temperature areas |
| Online air breathing apparatus | Chemical vapour/dust exposure |
| Airline mask / SCBA / cartridge gas mask | Toxic gas, oxygen-deficient, or inert atmospheres |
| Dust mask | Hazardous dust/fibrous particle exposure |
Important caution the standard raises: cartridge gas masks are not suitable in oxygen-deficient or inert-gas environments — they only filter contaminants, they don’t supply oxygen. Using the wrong respirator type in the wrong environment is a common and dangerous mistake.
Gas Testing — Getting the Numbers Right
Gas testing is referenced throughout the standard, but Section 6 consolidates the requirements.
| Test Parameter | Permissible Value |
|---|---|
| Oxygen content | Minimum 19.5% (readings above 23% signal dangerous oxygen enrichment) |
| Hydrocarbon content | 0% LEL |
| Toxic content | Below the Threshold Limit Value (TLV) |
When to test: – Prior to issuing the permit – Immediately before starting hot work or confined space/vessel entry – At regular intervals during the job (frequency decided by the issuer based on job risk) – At every renewal and revalidation
Who tests: Results must be reported by plant personnel specifically authorized by the plant HOD or area in-charge — not just anyone with a gas meter.
Welding-specific rule: For welding jobs, hydrocarbon testing must additionally cover a 5-metre radius around the work location, including nearby drain channels and adjacent flange joints/valve glands.
Approvals, Roles, and Responsibilities — Who Signs What
The Issuer’s Responsibilities (Clause 7.2.3)
- Controls the entire work permit process from start to finish.
- Confirms equipment preparation and safety measures are genuinely complete — not just ticked on paper.
- Issues separate permits for preparatory work (blinding, disconnection, scaffold erection) before issuing the permit for the actual job.
- Ensures relevant checklists have been identified and completed.
- Can stop ongoing work if conditions become unsafe (this authority extends to the incoming shift engineer as well).
- Obtains necessary approvals from plant/area in-charge before handing the permit to the acceptor.
- Signs closed permits after job completion.
The Executor’s Responsibilities (Clause 7.3)
- Jointly inspects the job location with the issuer before the permit is issued.
- Bears primary responsibility for safe execution of the job.
- Conducts a toolbox talk (safety briefing) with contract workers before starting.
- Ensures contractors understand permit conditions and PPE requirements throughout execution.
- Restores housekeeping before signing the permit as complete.
- For confined space work, confirms all personnel and materials are removed before the vessel is boxed up.
Plant/Area In-Charge
Required to authorize hot work, confined space, and excavation permits specifically. Employees above shift in-charge level, authorized by the plant HOD, can serve in this role — or the HOD can sign directly.
The Area Operator
- Verifies conditions before signing the permit to allow work to start.
- Inspects housekeeping before closing the permit.
- Keeps continuous awareness of ongoing jobs in their area and can suspend work if hazards develop.
Inter-Plant Clearances
When work involves pipelines or equipment that cross plant or facility boundaries, additional coordination is required:
- Shift in-charges of both connected plants must endorse the permit if safety depends on isolations outside the control of the executing plant.
- The owner of an outside-battery-limit pipeline authorizes and issues the permit for maintenance on their line.
- Where multiple pipelines run adjacent to the work area, the specific pipeline must be clearly identified with markings before the permit is issued — this prevents the classic mistake of accidentally working on the wrong, still-live line.
Revalidation, Renewal, and Closure
Validity Periods at a Glance
| Permit Type | Standard Validity | Maximum Extension |
|---|---|---|
| Cold work, hot work, vessel entry, excavation | 7 calendar days | New permit required after 7 days |
| Hot work (plant shutdown) | — | Up to 15 days |
| Blanket hot work permit | — | Up to 30 days |
| Radiography permit | Single use, duration stated on permit | Not renewable |
Renewal vs Revalidation — What’s the Difference?
- Revalidation applies when work continues without interruption beyond the originally approved time.
- Renewal applies when work was suspended for the rest of the day and is being restarted the next day.
Both require a joint site inspection by the issuer and acceptor, fresh gas testing where applicable, and endorsement by the area operator.
Closure and Cancellation
A permit is automatically or manually cancelled under these conditions:
| Trigger | Who Cancels |
|---|---|
| Plant/site emergency (e.g., fire) | Acceptor stops work and cancels automatically |
| Accident at the work area | Acceptor stops work and cancels automatically |
| Permit conditions violated | Any signatory or an auditor |
A permit can also be temporarily suspended (rather than fully cancelled) if conditions aren’t currently being met but can be corrected — this is done by any signatory or an authorized auditor.
On job completion, the agency must remove all tools, tackle, personnel, and material, and restore guards, gratings, and railings before the permit is signed as closed.
Audits — Keeping the System Honest
A written permit system is only as good as its enforcement. IS 17893:2023 mandates regular audits (Section 11):
- Auditors are authorized by the plant HOD or the HOD Safety.
- Audit frequency should be random but at least once a week.
- Auditors check whether permits are filled correctly, whether precautions match actual site conditions, and whether procedures were genuinely followed — not just documented.
- Auditors have the authority to cancel a permit on the spot if conditions are unsatisfactory.
- Findings are reported to the sector chief/HOD, and corrective actions are tracked.
Records Retention
The standard requires that the original/acceptor copy of every closed permit be retained by the issuer for at least 30 days after closure — useful for incident investigation, insurance queries, and regulatory inspection.
Best Practices for a Strong Work Permit System
- Never let the acceptor and issuer be the same person. Independent verification is the entire point of the system.
- Treat the checklist as a real inspection, not a formality. Ticking boxes without physically verifying conditions defeats the purpose.
- Always re-test gas levels before restarting after a break — atmospheric conditions inside a vessel or trench can change within minutes.
- Display the acceptor’s copy prominently at the job site so any passerby, auditor, or emergency responder immediately knows a job is in progress.
- Conduct a genuine toolbox talk, not a rushed signature exercise — workers should be able to repeat back the key hazards and precautions.
- Cross-reference associated permits. A hot work job inside a confined space needs both a hot work permit and a confined space permit — check the “associated permits” boxes carefully.
- Keep isolation tag logs meticulously. A missing or prematurely removed tag is one of the most common causes of serious incidents.
- Empower every worker with stop-work authority, not just supervisors.
- Retrain personnel periodically — the standard requires plant authorities to train employees in permit roles, and skills can decay if not refreshed.
- Use the excavation “underground services checklist” religiously — striking a live cable or gas line is entirely preventable with proper checking (D-17 to D-24 of Annex D).
Common Mistakes to Avoid
- Issuing a permit without a genuine site walk-down. Signing a form from the office without inspecting the actual location defeats the purpose.
- Using simple valve closure as isolation for hot work or confined space entry. The standard is explicit that this is unreliable — positive isolation (blinding or disconnection) is required.
- Allowing more than 230V lamps inside confined spaces. Only 24V flameproof hand lamps are permitted.
- Forgetting to close out preparatory permits (like scaffold erection or blinding permits) separately before starting the main job permit.
- Skipping medical fitness checks for height work above 2 m. This is a specific, non-negotiable requirement.
- Ignoring inter-plant coordination when equipment spans two plants’ boundaries — a permit issued by only one plant’s shift in-charge is insufficient.
- Letting permits run beyond their validity without renewal, especially across shift changes.
- Failing to physically remove isolation tags after job closure — leaving “DO NOT OPERATE” tags in place can itself become a hazard when the equipment is genuinely needed.
- Treating cartridge gas masks as universal respiratory protection — they don’t work in oxygen-deficient or inert atmospheres.
- Not maintaining the confined space attendance sheet properly, making it impossible to confirm everyone has exited before closing the space.
Frequently Asked Questions (FAQ)
Q1. What is IS 17893:2023?
It is an Indian Standard published by the Bureau of Indian Standards in June 2023, titled “Work Permit System — Code of Practice.” It provides a unified national framework for issuing, executing, and closing work permits across seven categories of industrial work.
Q2. Who issues a work permit?
Normally the shift in-charge of the operating area, who must be a company employee — permits can never be issued to a contractor directly, and no one can issue a permit to themselves.
Q3. How long is a work permit valid?
Cold work, hot work, vessel entry, and excavation permits are typically valid for a single shift and can be extended up to a maximum of 7 calendar days. Shutdown hot work permits can run up to 15 days, and blanket permits up to 30 days. Radiography permits are valid for single use only.
Q4. What’s the difference between renewal and revalidation of a permit?
Revalidation is for work continuing without a break beyond the approved time. Renewal is required if work was suspended for a full day or more and is being restarted afterward.
Q5. Why does hot work need gas testing but cold work doesn’t always?
Hot work introduces an ignition source (sparks, flame, heat), so any flammable vapour present becomes an immediate explosion risk. Cold work is tested only where residual hazards like confined space entry are also involved.
Q6. Can a permit be cancelled once issued?
Yes. It is automatically cancelled if there’s a site emergency or an accident at the work location, and it can be cancelled by any signatory or an auditor if permit conditions are violated.
Q7. What depth of excavation requires a confined space permit in addition to an excavation permit?
Any excavation of 1.2 m or more in depth is treated as a confined space and needs an additional confined space entry permit.
Q8. Who can issue a radiography permit?
Only a supervisory employee under whom the radiography contractor is working can issue it, and it must be registered at the fire station.
Q9. What is “positive isolation” and why does it matter?
Positive isolation means physically blinding a line or disconnecting it, rather than just closing a valve. Valve closure alone can leak or fail, so for high-risk work like hot work or confined space entry, positive isolation is mandatory.
Q10. What PPE is mandatory for everyone, regardless of the job?
Safety helmet, safety goggles, hand gloves, and safety shoes are the baseline PPE requirements for all employees in work areas, with additional PPE specified based on job-specific hazards.
Conclusion
IS 17893:2023 is more than a bureaucratic form-filling exercise — it is a structured way of thinking about hazard, accountability, and communication before a job begins. By codifying seven distinct permit types, defining clear roles for issuers, executors, area operators, and auditors, and insisting on real gas testing, positive isolation, and proper PPE, the standard gives Indian industry a common language for workplace safety.
For EHS professionals and safety officers, the real value of this standard lies not in memorizing clause numbers but in embedding its logic into daily plant culture: never skip the site walk-down, never treat isolation as a formality, always empower workers to stop unsafe work, and always close the loop with proper audits and record-keeping. Done right, a work permit system quietly prevents the accidents that never make the news — which is exactly the point.
Download All Work Permit Formats (Word Templates)
For quick access, here are all seven IS 17893:2023 work permit formats again as editable Word (.docx) downloads.
| Sl No. | Work Permit Name | Annexure Reference (IS 17893:2023) | Download Link (Word Format) |
|---|---|---|---|
| 1 | Cold Work Permit | Annex A | Download (.docx) |
| 2 | Hot Work Permit | Annex B | Download (.docx) |
| 3 | Confined Space / Vessel Entry Permit | Annex C | Download (.docx) |
| 4 | Excavation Permit | Annex D | Download (.docx) |
| 5 | Electrical Work Permit | Annex E | Download (.docx) |
| 6 | Work at Height Permit | Annex F | Download (.docx) |
| 7 | Radiography Permit | Annex G | Download (.docx) |
References
- IS 17893 : 2023 — Work Permit System — Code of Practice, Bureau of Indian Standards (BIS), New Delhi. Published June 2023. ICS 13.100. Price Group 15. Prepared by the Chemical Hazards Sectional Committee, CHD 07.
- Relevant clauses referred to in this article: Foreword; Clause 1 (Scope); Clause 2 (General Procedure for Work Permit); Clause 3 (Details of Work Permits for Different Works, sub-clauses 3.1–3.7); Clause 4 (Details and Procedure for Work Permit Formats, sub-clauses 4.1.1–4.1.25); Clause 5 (Personal Protection Equipment); Clause 6 (Gas Test); Clause 7 (Approvals); Clause 8 (Inter Plant Clearances); Clause 9 (Revalidation and Renewals); Clause 10 (Closures and Cancellation); Clause 11 (Audits); Clause 12 (Responsibility); Clause 13 (Records); Annex A (Cold Work Permit); Annex B (Hot Work Permit); Annex C (Confined Space/Vessel Entry Permit); Annex D (Excavation Permit); Annex E (Electrical Work Permit); Annex F (Permit for Working at Height); Annex G (Radiography Permit); Annex H (Committee Composition).
Disclaimer: This article is an independent, simplified explanation of IS 17893:2023 for educational purposes. It does not reproduce the standard verbatim and is not a substitute for the official BIS publication. Organizations implementing a work permit system should procure and refer to the official IS 17893:2023 document from BIS.
Excellent and comprehensive explanation of IS 17893:2023. The article simplifies every permit type with practical examples, making it very useful for EHS professionals, supervisors, and safety officers. Great work!