Hot Work Permit Requirements Malaysia: DOSH Fire Prevention Guide for Welding and Cutting

A welder is cutting a bracket on the second floor of a factory under renovation. Sparks fall through a gap in the floor and ignite solvent-soaked rags stored below. By the time anyone notices, the fire has spread to the raw materials storage area. The contractor had no hot work permit. No fire watch was posted. No combustibles were cleared from the area below. The entire west wing of the factory is destroyed. The fire insurance claim runs into the millions.

This guide covers everything you need to know about hot work permit requirements in Malaysia: when you need one, what it must contain, how to run a proper hot work operation, and what happens to your insurance claim when things go wrong.

This guide covers:

• What counts as "hot work" under Malaysian regulations
• Legal requirements for hot work permits
• The hot work permit process step by step
• Fire watch requirements and duration
• Hot work in hazardous areas and confined spaces
• Fire prevention checklist for hot work
• How fire and CAR insurance respond to hot work incidents
• Common hot work failures that cause fires

What Counts as Hot Work?

Hot work is any activity that produces sparks, open flames, or sufficient heat to ignite flammable materials. It's not limited to welding. Many activities that factory managers don't think of as "hot work" can start fires.

Activity	Hot Work?	Why
Arc welding (SMAW, MIG, TIG)	Yes	Electric arc produces temperatures above 3,000°C; molten metal spatters
Oxy-acetylene cutting	Yes	Open flame and molten slag; sparks can travel 10+ metres
Angle grinding and disc cutting	Yes	Sparks from metal friction; hot metal particles
Brazing and soldering	Yes	Open flame from torch; heated metal
Thermal lance cutting	Yes	Extremely high temperature; used for cutting thick steel and concrete
Heat shrinking with heat gun	Yes	Heat gun temperatures can exceed 500°C; ignites nearby flammables
Drilling into metal	Conditional	May produce sparks and heat; hot work permit needed in hazardous areas
Powered wire brushing	Conditional	Can produce sparks; permit required near flammable materials

The key question isn't whether the activity is on this list. It's whether the activity can produce enough heat or sparks to ignite materials in the surrounding area. If the answer is yes, you need a hot work permit.

Legal Requirements

Hot work permit requirements in Malaysia come from multiple regulatory sources. There's no single "Hot Work Act," but the combined effect of these regulations makes hot work permits mandatory for any workplace handling flammable or combustible materials.

Regulation	Hot Work Requirement	Penalty for Non-Compliance
OSHA 1994 (Section 15)	Employer must provide safe systems of work including fire prevention during hot work	Up to RM500,000 or 2 years imprisonment
Fire Services Act 1988	Premises must have fire prevention measures; hot work near flammables requires controls	Fines under the Act; fire certificate may be revoked
the former FMA 1967 (repealed 1 Jun 2024)	Factory machinery maintenance (including welding) must follow safe procedures	Fines as prescribed under FMA
CIMAH 1996	Hot work in MHI/NMHI facilities requires specific permit with gas testing	Up to RM500,000 under OSHA

Beyond legislation, your BOMBA fire certificate conditions may also require documented hot work controls. A fire caused by uncontrolled hot work can result in your fire certificate being suspended or revoked, shutting down your operations.

The Hot Work Permit Process

A hot work permit isn't just a form you fill in. It's a structured process with defined steps that must happen in order.

Step	Action	Who
1	Applicant identifies the hot work to be done, location, timing, and equipment needed	Welder/contractor (Permit Applicant)
2	Area inspection: check for flammable materials, gases, dusts within 11 metres (35 feet)	Permit Applicant + Area Supervisor
3	Remove or protect combustibles: clear the area, cover what can't be moved with fire blankets	Work team
4	Gas testing if hot work is near flammable storage, pipework, or in confined spaces	Certified Gas Tester
5	Ensure fire fighting equipment is in place: extinguisher, fire blanket, water source if available	Work team
6	Assign fire watch person (must be dedicated; not the welder)	Area Supervisor
7	Issuing Authority reviews all precautions, signs the hot work permit	Issuing Authority (plant manager or delegate)
8	Toolbox talk with all involved workers; everyone signs the permit	Permit Applicant
9	Hot work proceeds within permitted scope, time, and location	Welder/cutter
10	Post-work fire watch maintained for minimum 60 minutes after hot work ends	Fire Watch Person
11	Final area inspection; permit closed and signed off	Permit Applicant + Issuing Authority

Fire Watch Requirements

The fire watch is the single most important safety control during hot work. It's also the one most commonly skipped. A dedicated fire watch person must be present throughout the hot work and for a defined period after work ends.

Fire Watch Requirement	Details
Who	A trained person whose sole duty is watching for fire. The welder cannot be the fire watch.
During hot work	Continuously present throughout the entire hot work activity
After hot work ends	Minimum 60 minutes post-work fire watch. Some sites require 120 minutes for high-risk areas.
Equipment	Must have access to fire extinguisher, fire alarm activation point, and communication device
Authority	Must have authority to stop work immediately if fire risk detected
Coverage area	Must be able to see the hot work area and all adjacent areas where sparks could travel (including floors above and below)

Sparks from welding can travel up to 11 metres horizontally and even further when falling vertically. The fire watch must monitor not just the immediate work area but also areas below, behind walls, and on the other side of partitions where sparks and hot metal can travel through gaps.

Hot Work in Hazardous Areas

Hot work near flammable materials, chemical storage, or fuel systems requires additional precautions beyond the standard permit.

Hazardous Situation	Additional Precautions
Near flammable liquid storage	Gas test for LEL (Lower Explosive Limit) before and during work. LEL must be below 10%. Continuous gas monitoring.
On or near pipework that carried flammables	Pipe must be drained, purged, and gas-free certified. Blanking or disconnection at flanges.
Inside confined spaces	Both confined space entry permit AND hot work permit required. Forced ventilation throughout. Continuous atmospheric monitoring.
On tanks or vessels that held flammables	Tank must be cleaned, gas-free certified, and inerted if necessary. Never cut into a vessel without gas-free certification.
Near dust explosion hazards (grain, wood, metal)	Dust suppression or removal before work. Continuous monitoring for airborne dust concentration.
On roof or near roofing materials	Bitumen and insulation materials are flammable. Fire blankets on adjacent areas. Extended fire watch (minimum 2 hours).

For CIMAH-regulated facilities, hot work in process areas often requires a Gas-Free Certificate issued by a competent person before any hot work permit can be issued. This is a prerequisite to the hot work permit, not a substitute for it.

Hot Work Fire Prevention Checklist

Before Hot Work Starts	Status
Hot work permit issued and signed by Issuing Authority	☐
All combustibles removed or covered within 11-metre radius	☐
Floor openings, gaps in walls/floors covered to prevent spark passage	☐
Gas test completed (if near flammable materials): LEL below 10%	☐
Fire extinguisher (minimum ABC powder or CO2) within reach	☐
Fire blankets available for covering nearby equipment	☐
Fire watch person assigned (not the welder)	☐
Fire alarm location known to fire watch person	☐
Sprinkler system in service (if applicable)	☐
Welding equipment inspected (no gas leaks, cables intact)	☐
Welder wearing appropriate PPE (welding helmet, gloves, fire-resistant clothing)	☐
Toolbox talk conducted; all workers signed permit	☐

After Hot Work Ends	Status
Fire watch maintained for minimum 60 minutes post-work	☐
Area inspected for smouldering materials, hot surfaces, hidden fires	☐
Adjacent areas (above, below, behind walls) checked for fire	☐
Hot work equipment switched off and secured	☐
Gas cylinders valves closed and regulators removed (if oxy-fuel)	☐
Permit formally closed and signed off	☐

Connection Between Hot Work and Insurance

Hot work fires are one of the most common causes of industrial fire claims in Malaysia. Insurance adjusters have seen enough of these to know exactly what to look for: was there a permit, was a fire watch posted, were combustibles cleared?

Free download: Permit to Work & Hot Work Quick Reference — keep this on-site for quick compliance checks.

How Different Insurance Products Respond

Insurance Product	How It Connects to Hot Work	Key Consideration
Fire Insurance	Covers fire damage to building and contents. Hot work fires are a covered peril.	Policy may include "hot work warranty" requiring documented hot work controls. Non-compliance may void the warranty.
IAR	Broader coverage including fire and other perils. Covers building, machinery, stock.	Risk survey may specifically ask about hot work procedures. Poor controls can affect underwriting terms.
CAR/EAR	Covers damage during construction and erection. Hot work is a major activity on construction sites.	CAR policies often have hot work conditions. Fire during welding that damages the works is a common claim type.
CGL	Covers third-party injury and property damage. Hot work sparks damaging adjacent property.	If hot work in your premises causes fire that spreads to neighbouring property, CGL responds to the third-party claim.

With Permit vs Without Permit

Scenario	Without Hot Work Permit	With Hot Work Permit
Welding sparks ignite stored materials	No permit, no fire watch, combustibles not cleared. Adjuster flags gross negligence. Fire policy hot work warranty may be voided.	Permit shows area was cleared, fire watch was posted. Fire started from spark travelling further than expected. Claim supported by evidence of reasonable precautions.
Fire spreads to neighbouring factory	Neighbour sues. No evidence of fire prevention. CGL claim complicated by clear negligence.	Hot work permit documents all precautions. CGL claim is cleaner because employer can show they exercised due diligence.
Contractor welder causes fire on renovation project	No PTW system in place. Both contractor and building owner face liability. CAR claim for damage to existing structure may face scrutiny.	Hot work permit issued jointly. Responsibilities clear. CAR claim proceeds with clear documentation of who was responsible for what.

Many fire insurance policies contain a "hot work warranty" or "hot work condition". This is a specific clause that requires the policyholder to have documented hot work procedures in place. If you can't demonstrate that you had a hot work permit system and it was being followed, the warranty may be breached, which can affect your claim. Check your policy wording.

Common Hot Work Failures That Cause Fires

Failure	Why It Causes Fires	How to Prevent It
No fire watch posted	Smouldering material ignites after welder leaves; nobody notices until fire is established	Dedicated fire watch during and 60+ minutes after hot work
Combustibles not cleared	Sparks land on oily rags, cardboard, plastic wrapping, or timber	Clear everything flammable within 11 metres; cover what can't be moved
Sparks fall through floor openings	Fire starts on the floor below, hidden from the welder	Cover all openings; post fire watch on the floor below as well
Welding on pipeline containing residual fuel	Heat ignites residual fuel or vapour inside the pipe, causing explosion	Pipe must be drained, purged, and gas-free certified before any hot work
Hot work done outside permitted hours	Fire starts during night shift when fewer people are around to detect and respond	Enforce permit time limits; no hot work extensions without re-authorisation
Defective welding equipment	Gas leaks from oxy-fuel hoses, damaged cables causing sparks at connections	Equipment inspection as part of pre-work checks on the permit

Hot Work During Shutdowns and Turnarounds

Plant shutdowns and turnarounds involve concentrated periods of maintenance where dozens of hot work activities may happen simultaneously across the facility. This is when the risk is highest.

Shutdown Hot Work Challenge	Control Measure
Multiple hot work activities in same area	Permit board showing all active hot work permits and their locations; SIMOPS review
Large number of contractors unfamiliar with site	Mandatory hot work orientation for all contractor welders before permits are issued
Production pressure to complete turnaround quickly	Safety team authority to stop hot work if conditions change; no shortcutting permit process
Residual hazards in process equipment	Gas-free certificates for all vessels and pipework before hot work; continuous monitoring

During shutdowns, ensure your CAR insurance covers the maintenance works and that all contractors have valid WC coverage for their workers. The concentrated risk during shutdowns is exactly when insurance coverage matters most.

FAQ

Is a hot work permit legally required in Malaysia?

Yes, in practice. While there's no single "hot work permit law," OSHA 1994 requires employers to provide safe systems of work. DOSH industry codes of practice and guidelines specifically require hot work permits for activities that produce sparks or flames near flammable materials. Operating without one is a breach of employer duty.

How far should combustibles be cleared from hot work?

The standard clearance zone is 11 metres (35 feet) in all directions from the hot work point. This includes above, below, and on the other side of walls or floors. Combustibles that can't be moved must be covered with fire-resistant blankets or sheets.

How long must fire watch continue after hot work ends?

Minimum 60 minutes. For high-risk areas (near flammable storage, chemical plants, roof work), many sites require 120 minutes or more. Smouldering fires from welding sparks can take up to an hour to develop into visible flames. This is why the post-work fire watch is so important.

Can the welder be the fire watch person?

No. The fire watch must be a dedicated person whose only job is watching for fire. The welder can't see behind, below, or through walls while focused on the weld. A separate person with fire extinguisher access must be assigned.

Does my fire insurance cover fires caused by hot work?

Generally yes, fire insurance covers fire damage regardless of cause. But many policies contain a "hot work warranty" that requires documented hot work controls. If the warranty is breached because you had no hot work permit system, it could affect your claim. Check your policy wording for hot work conditions.

What if a contractor's welding causes fire at my factory?

Both the factory owner and the contractor may bear liability. The factory owner's fire insurance or IAR covers the property damage. The contractor's CAR insurance may cover damage to the works. If third parties are affected, CGL responds. A documented hot work permit helps establish who was responsible for what.

Do I need gas testing before hot work in my factory?

Gas testing is required whenever hot work is performed in or near areas that contain or have contained flammable liquids, gases, or vapours. This includes near fuel storage, solvent areas, chemical plants, and any confined space. The gas test must confirm the atmosphere is below 10% of the Lower Explosive Limit (LEL) before work begins.

What about hot work on construction sites?

Construction sites present unique hot work risks because the building is incomplete. Temporary structures, exposed insulation, stored materials, and lack of permanent fire detection systems increase the risk. Construction projects must include hot work permits as part of the site safety plan, and CAR insurance should be in place to cover fire damage during construction.

Foundation Conclusion

Hot work fires are preventable. Every major hot work fire investigation traces back to the same basic failures: no permit, no fire watch, combustibles not cleared. A proper hot work permit system costs almost nothing to implement but can prevent fires that cause millions in damage.

Pair your hot work controls with the right insurance coverage: fire insurance or IAR for property damage, CAR for construction works, and CGL for third-party exposure. The permit system reduces the risk. The insurance covers the residual exposure that no amount of planning can eliminate.

Talk to our risk specialists about fire insurance and hot work coverage for your operations

Disclaimer: This article provides general guidance based on current regulations and official agency information as of March 2026. Regulations may be amended. Always verify current requirements with the relevant agency or qualified professionals before making compliance decisions.