What is classified as a confined space in Malaysia?

Under the Industry Code of Practice for Safe Working in a Confined Space 2010, a confined space is any enclosed or partially enclosed space that is not designed for continuous human occupancy, has limited entry/exit, and may have a hazardous atmosphere, engulfment risk, or other serious safety hazards.

Who can authorise a confined space entry permit in Malaysia?

Only a competent person as defined under OSHA 1994 can authorise confined space entry. This person must have adequate training, knowledge, and experience in confined space hazards, gas testing, and emergency procedures.

What gas testing is required before confined space entry?

Before entry, the atmosphere must be tested for oxygen levels (19.5%-23.5%), flammable gases (below 10% LEL), and toxic gases (below permissible exposure limits). Testing must be done by a competent person using calibrated equipment, and continuous monitoring is required during entry.

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Confined Space Entry Permit Requirements Malaysia 2026

Updated: May 2026 · 10 min read · By SafeSyt Editorial

Confined space entry is one of the highest-risk activities in any workplace. In Malaysia, confined space work is regulated under the Industry Code of Practice for Safe Working in a Confined Space 2010 (ICOP 2010), issued under the Occupational Safety and Health Act 1994. Failure to comply with confined space entry requirements has resulted in multiple fatalities in Malaysia.

This guide covers the complete requirements for confined space entry permits, including definitions, the permit to work system, gas testing protocols, rescue planning, competent person requirements, and necessary equipment.

What is a Confined Space?

Under ICOP 2010, a confined space must meet ALL of the following criteria:

Enclosed or partially enclosed space
Not designed or intended for continuous human occupancy
Has limited or restricted means of entry or exit
May have one or more of the following hazards: hazardous atmosphere, engulfment risk, internal configuration that could trap a person, or other recognised serious safety/health hazards

Common Examples of Confined Spaces

Industry	Examples
Construction	Manholes, tunnels, shafts, deep excavations, caissons
Manufacturing	Storage tanks, silos, vats, reactors, boilers, ovens
Oil & Gas	Storage tanks, vessels, pipelines, separators
Utilities	Sewers, water tanks, pump stations, electrical vaults
Maritime	Ship holds, ballast tanks, cargo tanks, chain lockers
Agriculture	Grain silos, manure pits, fermentation tanks

Permit to Work (PTW) System

No person shall enter a confined space without a valid Confined Space Entry Permit. The permit system must include:

Permit application: Submitted by the entry supervisor detailing the work to be done
Hazard assessment: Identification of all potential hazards within the space
Control measures: Documented controls for each identified hazard
Gas test results: Recorded atmospheric test results before and during entry
Authorisation: Signed approval by the competent person/authorising authority
Time limitation: Permits are valid for a maximum of 8 hours (or one shift)
Cancellation conditions: Clear criteria for when the permit must be cancelled

Permit Must Include

Item	Details
Location	Exact identification of the confined space
Purpose of entry	Specific work to be performed
Date and time	Valid from/to (max 8 hours)
Authorised entrants	Names of all persons permitted to enter
Standby person	Name of designated standby person
Gas test results	O2, LEL, H2S, CO readings with time stamps
Ventilation	Type and duration of ventilation provided
PPE required	Specific PPE for the entry
Communication	Method of communication between entrant and standby
Rescue plan	Reference to rescue procedure and equipment location
Emergency contacts	Phone numbers for emergency services

Gas Testing Requirements

Atmospheric testing is mandatory before and during confined space entry:

Parameter	Safe Range	Action if Outside Range
Oxygen (O2)	19.5% — 23.5%	Do not enter. Ventilate and re-test
Flammable gases (LEL)	Below 10% LEL	Do not enter. Identify source, ventilate
Hydrogen Sulphide (H2S)	Below 10 ppm (TWA)	Do not enter without SCBA
Carbon Monoxide (CO)	Below 25 ppm (TWA)	Do not enter. Ventilate and re-test
Other toxic gases	Below PEL as per USECHH 2000	Do not enter without appropriate RPE

Testing protocol:

Test at multiple levels (top, middle, bottom) as gases stratify
Test must be performed by a competent person using calibrated equipment
Equipment must be calibrated as per manufacturer specifications (typically daily bump test)
Continuous monitoring required during entry — alarm set at action levels
Re-test after any break in work exceeding 30 minutes
Record all readings on the entry permit with timestamps

Rescue Plan Requirements

A written rescue plan must be in place before any confined space entry. The plan must include:

Rescue team: Minimum 2 trained rescue personnel on standby at all times during entry
Rescue equipment: Immediately available at the entry point (retrieval system, SCBA, first aid)
Communication: Continuous communication between entrant, standby, and rescue team
Non-entry rescue: Preferred method — retrieval line and mechanical winch to extract without entering
Entry rescue: Only if non-entry rescue is not feasible — requires additional trained personnel
Emergency services: Pre-notification to nearest hospital/BOMBA if high-risk entry
Drill frequency: Rescue drills must be conducted at least every 6 months

Competent Person Requirements

Role	Qualifications	Responsibilities
Entry Supervisor	Trained in confined space hazards, gas testing, permit system	Authorises entry, verifies controls, cancels permit if conditions change
Standby Person	Trained in emergency procedures, communication, non-entry rescue	Maintains communication, monitors entrants, initiates rescue if needed
Entrant	Trained in hazard recognition, PPE use, emergency procedures	Follows permit conditions, monitors own condition, exits if alarm triggers
Gas Tester	Trained and certified in atmospheric monitoring equipment	Conducts pre-entry and continuous testing, records results
Rescue Team	Trained in confined space rescue, first aid, SCBA use	Executes rescue plan, provides first aid, coordinates with emergency services

Required Equipment

Gas detector: 4-gas monitor (O2, LEL, H2S, CO) — calibrated and bump-tested
Ventilation: Mechanical ventilation (blower/extractor) with ducting
Retrieval system: Tripod with mechanical winch and full-body harness
SCBA/Airline respirator: For rescue team and emergency use
Communication: Two-way radio or hardwired communication system
Lighting: Intrinsically safe (explosion-proof) lighting
PPE: Full-body harness, helmet, safety boots, gloves, coveralls
First aid kit: Including oxygen resuscitation equipment
Barricades and signage: To prevent unauthorised entry

Permit Cancellation Conditions

The entry permit must be immediately cancelled if:

Gas alarm activates (any parameter outside safe range)
Ventilation system fails
Entrant feels unwell or disoriented
Communication with standby person is lost
Conditions change from those assessed (e.g., unexpected water ingress)
Rescue team is no longer available
Permit time limit expires

Manage Confined Space Permits Digitally

SafeSyt provides digital permit-to-work forms with automatic expiry alerts, gas test logging, and rescue plan checklists.

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