Certificate Hazardous Areas and Intrinsic Safety

Course Outline

Introduction And Overview

• Explosion- Definition
• Types of Hazards
• Methodology of risk protection
• Overall plant safety strategy

Explosion Protection

• International Electro technical Committee(IEC)- Standard series
• Sources of ignition from electricity
• Heat- Ignition temperature and Flammability
• Limits of flammability
• Principle of protection

DUSTS: IEC61241 And Apparatus Grouping

• Dusts - Properties
• Equipments for protective systems
• Emergence of Apparatus grouping
• Temperature classification
• T Rating for apparatus
• Ambient Temperature Classification System
• Concepts of Explosion Protection

Principle Of Explosion Confinement

• Special Protection Ex ‘s’
• Zones of Protection

• Principles of Overall Safety Assessment
• Design Objective
• Hazardous and Non Hazardous Area
• Systematic Approach to Area Classification
• Standards for Area Classification

• Guidelines in terms of Standards for different industries
• Classification under ‘Source of Release’ method
• Zones of Protection
• ‘Normal’ and ‘Abnormal’ Plant Operation
• Area Classification Process
• Ventilation- Types, Requirements and Availability

• Mathematical Approach
• Release rate of gas or vapour
• Estimation of persistence time
• Area Classification- Dust
• Policy and Guidelines for Implementation

• Tank Area Classification
• Summary of Area Classification

Construction Of Protection Concept ‘d’

• Explosion Containment
• Flameproof- Definition and Illustration
• Ex d Gap Construction

Introduction To Maximum Experimental Safe GAP(MESG) And Cables

• MESG- Definition
• Pressure Pilling
• Cable entries and glands
• Maintenance Procedure
• Grouping and effect of Temperature Classification

Introduction To Intrinsic Safety Ex ‘i’

• Overview of Intrinsic safety
• Energy and Power
• Different types of Intrinsically Safe Apparatus

Ignition Sources Covered By IEC 60079-11 Standards

• Mechanical Ignitions
• Thermal Ignitions
• Types of Electrical Ignitions

Introduction To Hazardous Area Apparatus

• Simple Apparatus
• Safety Description of Apparatus

General Requirements Of Protection Concept ‘e’

• IEC Standards of Europe/Australia and North America
• Construction techniques and arrangements of Ex ‘e’
• Testing requirements of Ex ‘e’ Motor
• Additional requirements for rotating electrical machines
• Starting Current Ratio

Selection And Installation Of Protection Concept ‘n’

• Type of protection ‘n’
• Construction techniques of Ex’ n’
• Selection and installation of Ex ‘n’
• General requirements of construction
• Ex ‘n’- Various techniques

Design Requirements Of Protection Concept Purge ‘p’

• Definitions
• Standards and Certifications in brief
• Construction requirements
• Principles of application
• Other design requirements

• Design requirements of Protection concept ‘o’
• Applications of Protection technique ‘q’ and ‘m’
• General requirements of Protection concept‘s’
• Dust Risks- IEC 61241

• Scope
• Electrical installations in hazardous areas
• Documentation/Information required by Installer
• Provisions made for the use of uncertified apparatus
• Selection of electrical apparatus
• Protection from dangerous sparkling

• Definitions and terms
• Structural Earthing
• Parasitic Capacitance

Recommendations For Inspection And Maintenance Of Electrical Installations In Hazardous Areas

• Requirements of Hazardous areas installations
• Hazardous area rules
• Preventive Maintenance Inspections

Standards And Certification Marking

• ISO and IEC – Overview
• Functions of CENELEC
• Description of System Certificates and Certified Documents
• Explosion Protection Documents and its typesINTRODUCTION AND OVERVIEW OF ATMOSPHERES EXPLOSIVES (ATEX)
• Scope of the directive
• Essential safety requirements of ATEX
• Categories of surface industries
• Fundamental principles for ATEX directives