Technical Name: INTERMEDIATE NR 20 TRAINING COURSE CLASS III FOR WORK WITH FLAMMABLES AND COMBUSTIBLES – TAUGHT IN ENGLISH
Reference: 58882
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Intermediate NR20 Course English
The objective of the Intermediate NR20 Course English is to train workers to operate safely in facilities that handle flammable and combustible liquids, in accordance with the technical criteria established by Regulatory Standard No. 20. Thus, the content covers hazard identification, risk analysis, implementation of control measures, proper use of Personal and Collective Protective Equipment (PPE and CPE), and response to emergency situations.
In addition, the training in the Intermediate NR 20 Course in English also includes the correct issuance, use, and control of the Permit to Work (PT), ensuring legal compliance, document traceability, and operational integrity. The course ensures that the professional is technically qualified to operate in classified areas, with a focus on preventing, controlling, and mitigating critical events involving flammable substances.
Storage of Class 3 flammable liquids with visible GHS identification. In accordance with NR 20, every container holding flammables must display standardized labeling and be stored in a ventilated, segregated area with access control.
What are the fundamental physicochemical parameters for characterizing a liquid as flammable or combustible?
The technical characterization of flammable or combustible liquids is based on the following physicochemical parameters:
| Technical Parameter | Definition |
|---|---|
| Flash Point (°C) | Minimum temperature at which flammable vapors are released with external ignition |
| Ignition Point (°C) | Temperature at which the liquid ignites without an external heat source |
| LEL / UEL | Lower and Upper Explosive Limits (vapor/air mixture) |
| Vapor Density | Indicates whether the vapor tends to rise or accumulate near the ground |
These data determine the degree of hazard of the product, directly influencing storage strategies, ventilation, and isolation of ignition sources.
Intermediate NR20 Course English: Why does the absence of physical barriers and ignition source control turn a routine operation into an imminent critical risk?
In environments where flammable liquids are handled, the continuous or intermittent release of volatile vapors can form potentially explosive atmospheres (PEAs), even in seemingly controlled situations. Therefore, the absence of physical containment barriers, technical enclosure, efficient ventilation or isolation of classified areas compromises risk segregation, favoring the uncontrolled dispersion of these vapors.
Thus, the lack of strict control over ignition sources, such as heated surfaces, electrostatic discharges, equipment sparks or even grounding failures, creates a highly unstable scenario. Therefore, the combination between flammable vapors and uncontrolled ignition transforms a routine operation into a critical rupture point.
How to technically validate the use of PPE in activities involving volatile fuels, considering exposure time and material permeability?
The technical validation of PPE in environments with flammable risks requires an integrated approach based on the following fundamental criteria:
Chemical compatibility of the PPE material with the specific flammable liquid (consult the manufacturer’s chemical resistance table).
Continuous and intermittent exposure time, considering permeation and material degradation.
Certification and testing according to standards such as ABNT NBR 14023 (fire-resistant clothing)
Personal Protective Equipment should not be treated as a static barrier, but as a dynamic barrier conditioned to the operational context. Therefore, its effectiveness is directly related to the energy of the environment, frequency of use and active management of the PPE life cycle.
Mixed storage of flammable and corrosive liquids, requiring physical segregation and distinct signaling. NR 20 requires strict control over chemical incompatibilities and labeling in accordance with the Globally Harmonized System (GHS).
What are the minimum requirements for an emergency response plan involving leakage or fire with flammable liquids?
As established in NR 20 and supported by international best practices, an emergency response plan involving flammable liquids must be structured in a technical, objective and functional manner. The mandatory minimum elements include:
Updated risk map and evacuation route;
Isolation and leak containment procedures;
Identification of brigadiers and critical roles during the emergency;
List of extinguishing agents compatible with the flammables handled;
Integration with external emergency plans (Fire Department, Civil Defense);
Alarm systems, light and sound signaling, and specific PPE.
In addition, the plan must be tested, reviewed periodically and compatible with the real risk scenario of the facility. Its effectiveness depends on continuous operationalization and the familiarity of those involved with the procedures described. Thus, an outdated, unknown or unpracticed plan represents a hidden liability rather than a real protection tool.
Intermediate NR20 Course English: How should the Work Permit (PT) provided for in NR 20 be structured to ensure traceability, legal validity and operational effectiveness?
The Work Permit (PT), as established by NR 20, is a technical-formal instrument that validates the safe execution of activities in areas with flammable risk. To ensure its traceability, legal validity and operational effectiveness, the PT must contain the following mandatory elements:
Detailed description of the activity and location involved
Task-specific Risk Analysis
Implemented control measures (collective and individual)
Technical professional responsible for authorization and execution
Start/end date and time, with validity period
Signatures for acknowledgment and authorization
In addition, the PT must be archived and auditable, ensuring document traceability and legal responsibility. Therefore, operating without a valid, updated and technically grounded PT is not merely an administrative deviation; it is a conscious rupture of the safety system, shifting risk control to chance.
GHS identification of flammable liquid – Class 3. According to NR 20, labeling must be clear, durable and visible. Signage informs, but it is the operator’s attention that transforms the warning into preventive action.
How does the absence of a risk culture compromise even the most robust collective protection systems?
The effectiveness of any collective protection system lies not only in the devices installed but in the operational behavior that sustains them. Therefore, with diluted risk perception, the environment nullifies the practical function of gas sensors, containment barriers, forced ventilation and signaling in classified areas. Safety is not a final product but a living process sustained by continuous attention and a sense of collective responsibility.
In addition, risk culture is the invisible link that connects design, standards and human behavior. Therefore, without it, even systems with high functional reliability become merely scenographic. And there is a silent mental pattern that undermines this link, the automatic thought that “here, this never happens.” This seemingly harmless phrase is the seed of complacency and the statistical beginning of the next serious occurrence.
Intermediate NR20 Course English: What differentiates a certified worker from a truly qualified worker for areas with flammables?
The certificate proves formal participation in a course. True qualification manifests in practice, through how the worker interprets the environment, recognizes subtle variations in operational risk and makes decisions based not only on protocol but on active technical presence. Therefore, they act with predictability, discipline and normative mastery, but also with heightened attention to the dynamics of the field where they operate.
Thus, qualification goes beyond fulfilling workload requirements; it aligns technical knowledge with situational awareness and direct responsibility for the impact of one’s own conduct. Awareness emerges when the operator understands that their attention, or distraction, shapes the behavior of risk.
Click the Link: Criteria for Issuing Certificates according to the Standards
Free Professional Training Basic Notions (Does not replace Academic Education or Technical Training)Certificate of completion
Intermediate NR 20 Course in English
INTERMEDIATE NR 20 TRAINING COURSE CLASS III FOR WORK WITH FLAMMABLES AND COMBUSTIBLES – TAUGHT IN ENGLISH
Total Workload: 16 Hours
Module 1 – Flammables: Characteristics and Risks (2 Hours)
Technical definitions: flammables vs combustibles
Relevant physicochemical properties (flash point, ignition point, LEL/UEL)
Types of flammable products and their physical states
Hazards associated with storage and handling
Module 2 – Collective Control Measures and PPE (2 Hours)
Physical barriers, ventilation and containment
Appropriate Personal Protective Equipment (PPE)
Safety signage and delimitation of classified areas
Good operational practices and safe routines
Module 3 – Ignition Sources and Prevention (2 Hours)
Types of ignition sources (flames, electricity, friction, static electricity, etc.)
Methods for controlling and eliminating ignition sources
Grounding, equipotential bonding and explosion-proof systems
Module 4 – Fire Protection (2 Hours)
Detection and alarm systems
Extinguishing agents suitable for flammables
Procedures for area evacuation and isolation
Coordinated actions with the fire brigade
Module 5 – Emergencies with Flammables (2 Hours)
Identification and response to leaks, fires and explosions
Emergency action plan and risk communication
Evacuation, initial response and containment
Basic first aid for chemical and thermal burns
Module 6 – Detailed Study of NR 20 (2 Hours)
Structure of Regulatory Standard No. 20
Classification of facilities (I, II and III)
Legal and technical responsibilities of employers and workers
Module 7 – Preliminary Hazard/Risk Analysis (2 Hours)
Fundamental concepts of PHA/RA
Identification, assessment and prioritization of risks
Risk analysis exercises in simulated field
Discussion of real cases and incidents
Module 8 – Work Permit for Flammables (2 Hours)
Definition and importance of the Work Permit (PT)
Mandatory elements: activity description, control measures, validity
Issuance, cancellation and filing of the PT
Procedures for releasing and closing critical activities
Completion and Certification:
Practical Exercises (when contracted);
Evidence Recording;
Theoretical Evaluation;
Practical Evaluation (when contracted);
Certificate of Participation.
NOTE:
We emphasize that the General Normative Program Content of the Course or Training may be changed, updated, with items added or removed as necessary by our Multidisciplinary Team. Our Multidisciplinary Team is authorized to update, adjust, modify and/or remove items, as well as insert or remove Standards, Laws, Decrees or technical parameters they deem applicable, whether related or not, and the Contracting Party is responsible for complying with the requirements set forth in the relevant Legislation.
Intermediate NR 20 Course in English
